elect all that apply Which of the following couples are buffer systems? (a) KF/HF(b) KBr/HBr(c) Na^CO3/NaHCO3 A. KF/HF B. KBr/HBr □ C. Na2CO3/NaHCO3 □ D. none

Answers

Answer 1

Of the following given compound or couples KF/HF, Na^CO3/NaHCO3 are the  buffer systems as they consist of both weak base or acid.

What is  buffer systems?

Buffer systems is the acid-base homeostatic mechanism. It is helpful in maintaing the pH in blood by balancing the carbonic acid, bicarbonate ion, and carbon dioxide .

Formation of buffer systems:

Buffer systems are made of weak Base-acid mixed with its conjugate base-acid dissolved in water. The conjugate acid-base should be from its Salt.

Hence, Of the following given compound or couples KF/HF, Na^CO3/NaHCO3 are the  buffer systems as they consist of both weak base or acid.

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Related Questions

cobalt has a mass number of 59 and an atomic number of 27. a student wants to create a model of a cobalt atom. which statement about the model is correct?(1 point)

Answers

The statement correct about Cobalt atomic model is that the model should show 27 protons and 32 neutrons. (Option A)

Atomic model is the structure of an atom that consist of a nucleus located at the centre which comprises of the protons (positively charged) and neutrons (neutral) are present and the negatively charged particles called electrons that revolve around the centre of the nucleus. Cobalt is a chemical element with the symbol Co and atomic number 27. The atomic number refers to the number of protons in the nucleus of an atom. The mass number, also known as atomic mass number or nucleon number, refers to the total number of protons and neutrons in an atomic nucleus. As the mass number of Cobalt is 59 and atomic number is 27, the number of neutrons is 59 – 27 = 32. Hence, an atomic model of Cobalt should show 27 protons and 32 neutrons.

Note: The question is incomplete as it is missing options which are A) The model should show 27 protons and 32 neutrons. B) The model should show 59 protons and 27 neutrons. C) The model should show 32 protons and 59 neutrons. D) The model should show 27 protons and 27 neutrons.

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the balanced equation for part 2 of the experiment is: zn (s) cu2 (aq) cu (s) zn2 (aq) this reaction is... group of answer choices not spontaneous because e0cell > 0 spontaneous because e0cell < 0 not spontaneous because e0cell < 0 spontaneous because e0cell > 0

Answers

The above reaction is a spontaneous reaction as E0cell>0 and the reaction proceeds spontaneously.

What is electromotive potential?

The terminal potential difference, also known as EMF or electromotive force, occurs when no current flows.

The half reactions of the equation being

Zn (s) → Zn2+ (aq) + 2e- oxidation half-reaction  (Zn2+ (aq) + 2 e- → Zn (s) -0.76)

Cu2+ (aq) + 2e- → Cu (s) reduction half reaction (Cu2+ (aq) + 2 e- → Cu (s) +0.34)

E°oxid=- E°red= +0.76V

The chemical reaction occurs spontaneously, and an electron participates in it.

Therefore the above reaction is a spontaneous reaction as E0cell>0 and the reaction proceeds spontaneously.

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a sample of an ideal gas has a volume of 3.50 l3.50 l at 12.00 ∘c12.00 ∘c and 1.40 atm.1.40 atm. what is the volume of the gas at 20.80 ∘c20.80 ∘c and 0.986 atm?

Answers

The volume of a fixed amount of gas is directly proportional to its absolute temperature So 5.12 L.

A really perfect gasoline is a theoretical gas composed of many randomly transferring factor debris that is not difficult to interparticle interactions. the proper gas idea is beneficial as it obeys an appropriate fuel regulation, a simplified equation of state, and is amenable to analysis beneath statistical mechanics.

Calculation:-

Volume of ideal gas = 3.50 L

Temperature = 12⁰C = 285 K

Pressure = 1.40 atm

Temperature 2 = 20.80 ⁰C = 293.80 K

Pressure = 0.986 atm

New Volume V 2 = PVT/TP

= 1.40 × 3.50 × 293.80 / 285 × 0.986

= 5.12 L

New volume is 5.12 L.

A really perfect fuel is described as a fuel that obeys gas laws at all conditions of strain and temperature. best gases have speed and mass. They do now not have volume ideal fuel, additionally referred to as ideal fuel, a fuel that conforms, in physical behavior, to a specific idealized relation between strain, extent, and temperature called the appropriate, or trendy, gas regulation.

The gas particles have negligible volume. The fuel particles are similarly sized and do not have intermolecular forces of attraction or repulsion with different gasoline particles. The gasoline debris moves randomly in settlement with Newton's legal guidelines of motion. The gas debris has perfect elastic collisions without an electricity loss.

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you are given a liquid sample that contains methanol (ch3oh), ethanol (ch3ch2oh), or a mixture of both. you combust a 0.336 g sample and obtain 0.462 g of co2 and 0.378 g of h2o. what did you learn about your sample?

Answers

It is methanol when combust to  obtain 0.462 g of co2 and 0.378 g of h2o.

Methanol (CH3OH), commonly known as methyl alcohol, wood alcohol, or wood spirit, is the simplest of a vast series of chemical compounds known as alcohols. It is made up of a methyl group (CH3) joined to a hydroxy group (OH). In the past, methanol was produced by destructively distilling wood. The direct fusing of hydrogen and carbon monoxide gas in the presence of a catalyst is the key to modern methanol manufacturing. Methanol is being made more and more often using syngas, a mixture of carbon monoxide and hydrogen created from biomass.

Pure methanol is a necessary ingredient in chemical synthesis. Myriad key synthetic dyestuffs, resins, pharmaceuticals, and scents are among the numerous compounds produced using its derivatives.

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Ni(s)→Ni2+(aq)+2e−
Ag+(aq)+e−→Ag(s)
Which of the following is the balanced net ionic equation for an oxidation-reduction reaction between Ag+(aq) and Ni(s)based on the half-reactions represented above?

Answers

Ni (s), Ni+2 (aq), and two e- As the Ni releases two electrons to form Ni+2, the Silver ion must accept two electrons to balance the net reaction, therefore two silver ions will absorb two electrons to form silver. 2 e- 2 Ag + 2 Ag+ (aq) (s).

What is Redox reaction?

A chemical process in which electrons are moved between two reactants is referred to as a redox reaction. The alteration in the oxidation states of the reacting species can be used to pinpoint this electron transfer.

Redox reactions are oxidation-reduction chemical processes in which the oxidation states of the reactants change. Redox is a shortened version of reduction-oxidation. Two distinct processes—a reduction process and an oxidation process—can be used to describe all redox reactions.

Redox or Oxidation-Reduction processes always involve simultaneous oxidation and reduction reactions. In a chemical reaction, the material that is being reduced is referred to as the reducing agent, while the substance that is being oxidised is the oxidizing agent.

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ct the bond order for the molecule cs2, which exists in the gas phase at high temperature. would cs2 be paramagnetic or diamagnetic? bond order

Answers

In the gas phase, orbital mixing or sigma pi crossover occurs at high temperatures. Between carbon and oxygen molecules, there are differences in the molecular orbital arrangement.

What do you think of orbital theory?

Every atom has a propensity to cluster together to form molecular orbitals, claims the molecular orbital theory. Because of this arrangement, electrons are commonly connected to various nuclei and can be found in a wide range of atomic orbitals.

How is the theory of molecular orbitals created?

The atomic orbitals of the molecules' atoms are combined to form the molecules' molecular orbitals. Take the H2 molecule as an illustration. The mathematical functions for the two 1s atomic orbitals that combine to produce one of the molecule's molecular orbitals are added together.

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if 7.5l of ethane (c2h6) forms in a reaction between an unknown amount of acetylene gas (c2h2) and 15l of hydrogen gas at a constant pressure and temperature, what is the minimum amount of acetylene gas that must have reacted?

Answers

The balanced reaction equation is:

C2H2(g)+2H2(g)→C2H6(g)

The given volume of ethane product is:

vC2H6) = 7.5 L

We assume that this ethane was formed at constant temperature and pressure conditions. Therefore, we can relate volume values through the given stoichiometry. Assuming complete reaction, the ethane volume was formed from the given volume of hydrogen reactant:

v(H2) = 15 L

Acetylene and hydrogen react in a 1:2 ratio, so the required volume of acetylene is:

v(C2H2) = 7.5 L

Gas-Phase Chemical Reaction:

The volume of a gaseous species is highly sensitive to its temperature and pressure conditions. If these conditions are held constant, then the gas volume will vary proportionally to its molar quantity. If a given reaction system occurs in the gas phase at constant temperature and pressure conditions, then the behavior described here will apply to every gaseous species present. Therefore, the volume of each reactant will decrease over time, while the volume of each product will increase over time. The set of volume values will be related through the balanced stoichiometry.

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For the following reaction, 0.267 moles of carbon dioxide are mixed with 0.263 moles ofpotassium hydroxide.What is the formula for the limiting reagent?What is the maximum amount of potassium carbonate that can be produced?moles

Answers

Potassium hydroxide (KOH) is the limiting reagent in the reaction where 0.263 mol of this compound is mixed with 0.267 mol of carbon dioxide ([tex]CO_{2}[/tex]) to produce 0.1315 mol of potassium carbonate ([tex]K_{2}CO_{3}[/tex])

Calculation of the limit reagent

The limiting reactant is the element that is completely consumed in the reaction.

To determine the limiting reactant, stoichiometric relationships and the balanced equation of the reaction are used.

What is the balanced equation of the reaction?

[tex]CO_{2}[/tex] + 2KOH → [tex]K_{2}CO_{3}[/tex] + [tex]H_{2}O[/tex]

Stoichiometric relationships

If 1 mole of [tex]CO_{2}[/tex] combines with 2 moles of KOH, then 0.267 mole of CO2 combines with_

X moles of KOH = 0.267 mol of [tex]CO_{2}[/tex] x 2 mol of KOH / 1 mol of [tex]CO_{2}[/tex] x 2 mol of KOH / 1 mol of [tex]CO_{2}[/tex]

X moles of KOH = 0.534 moles

Therefore, the limiting reagent is KOH because it runs out first.

Calculation of the maximum amount of potassium carbonate produced

With the quantity of the limit reagent, the quantity of product is calculated stoichiometrically.

If for every 2 moles of KOH, 1 mole of [tex]K_{2}CO_{3}[/tex] is produced, then 0.263 moles of KOH produce:

X moles [tex]k_{2}CO_{3}[/tex]  = 0.263 mol KOH x 1 mol [tex]K_{2} CO_{3}[/tex] / 2 mol KOH

X moles [tex]K_{2} CO_{3}[/tex] =  0.1315 moles

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If 60 g of a radioactive substance naturally decays to 15 g after 16 hours, what is the half-life of the radioisotope?.

Answers

If 60 g of a radioactive source voluntarily declines to 15 g within 16 hours, the radioisotope's half-life is 8 hours.

What are radioisotopes and how are they measured for radioactivity?

The quantity of protons with in atomic nuclei of component atoms of the same chemical is the same, but the neutron count varies. The radioactive materials of an element are called radioisotopes. They can alternatively be described as atoms with excess electricity in their nucleus or unstable neutron-proton combinations. Actual radiation levels are reported using the Contributes to the ongoing (Bq), the global unit, or the Cobalt (Ci), official machine in the U. S.. Alternative photodiode varieties may be used instead of gamma counters, which are widely used to measure environmental parameters.

Briefing:

Half life = total life/2

Half life = 16/2

Half life = 8 hours

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coals and some biofuels are made from plants. explain why coal is non-renewable but biofuels are

Answers

Answer:

Because coal takes millions of years to develop, it is classified as a nonrenewable energy source. Coal contains the energy accumulated by plants that thrived in marshy forests hundreds of millions of years ago. Biofuel, on the other hand, is derived from biomass, such as plant or algal material or animal waste.

Explanation:

pts) a. what would be the expected result if you added concentrated nitric acid (hno3) instead of hydrochloric acid to each test tube in step 7?

Answers

If we added concentrated nitric acid (hno3) instead of hydrochloric acid to each test tube in step 7 Both NaCl(s) and NaC,H,O,(s) would precipitate out of solution.

Salt is another name for sodium chloride. It occurs in sea and inland waters. Additionally, rock salt is obtainable. Seawater contains 1% to 5% sodium chloride. It is a crystalline, white substance. When it is in an aqueous state, it is referred to as a saline solution. This substance is water soluble and contains sodium cation and chloride anion. Sodium and chloride ions are present in a 1:1 ratio. It is commonly known as table salt and is primarily used in the food industry for flavouring and preservation. The pH of sodium chloride is 7.

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list all possible downward transitions for an electron in the 3d state. remember the selection rules!

Answers

All possible downward transitions for an electron in the 3d state are 1s 2s 2p 3s and 3p.

The transition state of a chemical reaction is a particular configuration along the reaction coordinate. It is defined as the state corresponding to the highest potential energy along the  reaction coordinate. It is often marked with the double dagger.

The transition state is a high-energy state, and some amount of energy the activation energy  must be added in order for the molecule reach it. Because the transition state is unstable, reactant molecules don't stay there long, but quickly proceed to the next step of the chemical reaction.

In an atom, electrons can transition up or down depending on whether they absorb energy or emit energy. Electrons naturally want to be in the lowest possible energy state. Downward transitions would be possible to any lower energy level than the one the electron starts in so all possible downward transitions for an electron in the 3d state are 1s 2s 2p 3s and 3p.

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a) Draw the structure of the tetrahedral intermediate INITIALLY-FORMED in the reaction shown.
-You do not have to consider stereochemistry.
-Do not include counter-ions, e.g., Na+, I-, in your answer.
-In cases where there is more than one answer, just draw one.
b) Draw the structures of the organic products of the acyl transfer reaction.
-You do not have to consider stereochemistry.
-Draw the neutral form of the products; no charges.
-Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner.
-Separate multiple products using the + sign from the drop-down menu.

Answers

Triphenyl stereochemistry.  methanol is the product of the Grignard reaction between methyl benzoate and excess phenylmagnesium bromide.

We will have a reduction reaction in this case. We progress from an ester group to an alcohol group. The first step is to transfer a hydride from the LiAlH4 group to the carbonyl group. The ethyl group then separates to form ethanol and an aldehyde, which continues to react with more LiAlH4. In this case, another hydride is transferred to the carbonyl group, resulting in the formation of alcohol. (See Fig.)

Triphenyl methanol is the stereochemistry product of the Grignard reaction between methyl benzoate and excess phenylmagnesium bromide.

As the carbonyl moiety is attacked, the reaction proceeds via nucleophillic reaction. There is the formation of a tetrahedral intermediate. The attack of the first molecule of PhMgBr is accompanied by the loss of the -OMe group.

Trimethyl phenoxide is produced by the attack of a second PhMgBr molecule. Protonation

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the heat of vaporization of h2s, at its boiling point (–61°c) is 18.8 kj/mol. what mass of h2s can be vaporized (at its boiling point) with 100 kj of energy?

Answers

Mass of h2s can be vaporized (at its boiling point) with 100 kj of energy is 181g.

Energy = 100 kj

heat of vaporization of h2s =   18.8 kj/mol

Mass of h2s can be vaporized = Energy x molar mass/ heat of vaporization .

100 x 1 x 34.1g/18.8  = 181g

An object's or a substance's mass is a measurement of how much matter there is in it. Although grams can be used to measure smaller masses instead of kilograms, which is the standard SI unit for mass Using a balance would be necessary to determine mass. The quantity of matter in a specific object is measured by its mass. It will have the same mass regardless of where that object is in the vast universe. A measurement of the gravitational force acting on an object is its weight, on the other hand. Mass/weight units. The metric system uses the mass units gram (g), kilogram (kg), and tonne (t). 1000 g = 1 kg. A ton is 1000 kilograms.

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How many grams of fluorine,
F2, are needed to generate
7.65 moles of carbon
tetrafluoride, CF4?
C+2F2 → CF4
[?]g F2

Answers

581.247 g of fluorine, F₂, are needed to generate 7.65 moles of carbon tetrafluoride, CF₄.

What is a mole?

A mole is a very crucial unit of measurement used by chemists. A mole of a thing means you have 602,214,076,000,000,000,000,000 eggs. Just 12 eggs means she has 12 eggs. Chemists need to measure very small things such as atoms, molecules and other particles in moles. The number of moles, Avogadro's number, relates to the relative sizes of atomic mass units and gram mass units. A hydrogen atom has a mass of about 1 u, while a mole of H atoms has a mass of about 1 gram.

C + 2F₂ → CF₄

Mole ratio of F₂ and CF₄ is 2:1 i.e, the moles of fluorine are twice as much as the moles of carbon tetrafluoride.

Moles of carbon tetrafluoride = 7.65 moles

Moles of fluorine = 2 × 7.65

= 15.3 moles.

For mass of fluorine:

m = n × Mm

Where, m = mass of fluorine

n = moles of fluorine (15.3 moles)

Mm = molar mass of fluorine (37.99 g/mol)

m = 15.3 × 37.99

m = 581.247 g

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Which chemical forms a white precipitate when you test for sulphate ions in solution?

Answers

The chemical that is forms a white precipitate when you test for sulphate ions in solution is called barium sulfate.

What is barium sulphate?

Barium sulfate is described as the inorganic compound with the chemical formula BaSO₄ that is a white crystalline solid that is odorless and insoluble in water. It occurs as the mineral barite, which is the main commercial source of barium and materials prepared from it.

During qualitative analysis of anions, sulphates react with barium chloride to form white precipitate of barium sulphate.

Barium Sulphate is known to be composed of a barium cation and the sulphate anion. The sulphur is seen to be attached to four oxygen atoms. BaSO4 is a sulphate salt of barium and is found as the mineral barite which is a crystalline solid white which is insoluble in water and alcohol but soluble in concentrated acids.

Barium Sulphate is odourless.

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which salt is dissolved in agar to form the salt bridge from the cu chamber? cu(no3)2 no salt cuso4 kno3

Answers

To create the salt bridge from the cu chamber, potassium chloride or potassium nitrate that have gelled in the agar-agar media are dissolved in agar.

What is the salt bridge?

a type of electrochemical cell that joins the oxidation and reduction half cells with the aid of a salt bridge and a weak electrolyte. A salt bridge is a connector that connects an electrolytic solution's anodic and cathodic compartments.

What sort of salt bridge is this?

Salt bridges can be made using KCl, AgNO3, and other substances. Salt bridges are often utilized in a galvanic cell, such as a voltaic cell or Daniel cell. If there is no salt bridge, the solution in the half cell will accumulate the negative charge.

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how much heat is needed to convert 906 of ice at to steam at ? be sure your answer has the correct number of significant digits.

Answers

Amount of heat energy that is required to heat 906 g of ice to steam is 530952 Joules.

Explanation:

Given:

Amount of transferred energy = Q =?

Mass of ice (water) = m = 906 g

Initial temperature of ice = T(i) = -22° C

Final temperature of steam = T(f) = 118°C

Formula for Heat capacity is given by

Q = m×c×Δt ........................................(1)

where:

Q = Heat capacity of the substance (in J)

m=mass of the substance being heated in grams(g)

c = the specific heat of the substance in J/(g.°C)

Δt = Change in temperature (in °C)

Δt = (Final temperature - Initial temperature) = T(f) - T(i)

                                                                          = 118 - (-22) = 140°C

Specific heat of water is c = 4.186 J /g. °C

Substituting these in equation (1), we get

Q = m×c×Δt

   = 906 × 4.186 × 140

   = 530952.24 J

The heat energy required is equal to 530952.24 Joules ≅ 530952 Joules.

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Nuclear decay occurs according to first-order kinetics. A nuclide decays in 23. 0 minutes from 12. 9 g to 2. 04 g. What is the rate constant for the nuclide?.

Answers

The kinetics of first order governs nuclear decay. The nuclide's rate constant is 0.0803 min1, and it decays from 12.9 g to 2.04 g in 23.0 minutes.

By nuclide, what do you mean?

This number of protons, neutron, and the activity state of a nucleus define a species of atom known as a nuclide, also known as a nuclear species. Thus, a nuclide is identified by its atomic number and mass number (A) (Z).

Nuclide example: What is it?

A kind of atom known as a nuclide is one that has a particular number of proton and neutrons with in nucleus, such as carbon-13, which has 6 protons & 7 neutrons. Radionuclides connected to the carrier release ionizing radiation that kills cancer cells.

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Please Help ASAP 100 points
What is the effect of increasing the pressure on the system in an equilibrium state given by the equation 2H2O2(l)

2H2O(g) + O2(g)?

1. The system attempts to increase the number of gas particles by decomposing hydrogen peroxide.
2. The system attempts to increase the number of gas particles by synthesizing hydrogen peroxide.
3. The system attempts to reduce the number of gas particles by decomposing hydrogen peroxide.
4. The system attempts to reduce the number of gas particles by synthesizing hydrogen peroxide.

Answers

If the pressure of the system is increased, the system will attempt to reduce the number of gas particles by synthesizing hydrogen peroxide. Option 4.

Le Chatelier's principle

According to Le Chatelier's principle, a system in equilibrium that is acted upon by one of the constraints that affect the rate of reactions will always try to adjust in order to nullify the effects of the external constraints.

The constraints being referred to by Le Chatelier include temperature, pressure, and concentration of the species in the system.

When the pressure of a system in equilibrium is increased or decreased, the system will adjust to annul the effect by moving towards the reactants or the products as needed.

In this reaction: [tex]2H_2O_2(l) < -- > 2H_2O(g) + O_2(g)[/tex]

There are 2 moles on the reactant's side while 3 moles are on the product's side (2 moles of water plus one mole of oxygen). Thus, it appears the product's side is more populated.

Consequently, an increase in the pressure of the system will shift to synthesize more hydrogen peroxide by reducing the number of gas particles.

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A student needs to dilute a 0.49 M Pb(NO3)2 solution to make 87.0 mL of 0.21 M Pb(NO3)2 . Set up the calculation by placing the values with the correct units into the equation. Then, calculate the volume, in milliliters, of the 0.49 M Pb(NO3)2 solution that is needed.

Answers

The initial volume of the solution of Pb(NO3)2 is 37.29 milliliters required to dilute for mentioned condition.

The volume will be calculated by the formula -

[tex] M_{1}[/tex][tex] V_{1}[/tex] = [tex] M_{2}[/tex][tex] V_{2}[/tex], where we have initial concentration and volume on Left Hand Side and final concentration and volume on Right Hand Side. Now, keeping the values in formula to find the final volume in milliliters.

0.49 × [tex] V_{1}[/tex] = 0.21 × 87

Performing multiplication on Right Hand Side of the equation

0.49 × [tex] V_{1}[/tex] = 18.27

Shifting the numerical value from Left Hand Side to Right Hand Side of the equation

[tex] V_{1}[/tex] = 18.27 ÷ 0.49

Performing division on Right Hand Side of the equation

[tex] V_{1}[/tex] = 37.29 millilitres

Hence, the volume is 37.29 milliliters.

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in which species can we describe the central atom as having sp3d hybridization? select all that apply.

Answers

In which species can we describe the central atom as having sp³d hybridization is SF₄.

The hybridization of SF₄ :

number of electron pair = 1 / 2 [ V + N + C - A ]

where, V = number of valence electron = 6

N = number of molecule = 4

C = cation = 0

A = anion = 0

number of electrons pair = 1 /2 [ 6 + 4 ]

                                       = 5

The , number of electron pair is 5 out which 4 are bonding electrons and one is non bonding electron pair , present as lone pair. the hybridization is sp³d.

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Determine the quantity (g) of pure MgSO4 in 2. 4 g of MgSO4•7H2O. Show your work

Answers

The amount (g) for pure MgSO4 in the following statement is actually 2. 4 g pure MgSO4•7H2O was 1.2 g MgSO4.

How do you use quantity?

A Quick Look at Quantity. When referring to just a single word that CANNOT be measured, use the word amount. - When referring to a solitary or plural term that CAN be counted, use number. – When referring to an inanimate, singular or plurality word that is counted or measured, quantity should be used.

Briefing:

%MgSO4 in MgSO4.7H2O is determined as x 100 = ?

Molar mass of MgSO4.7H2O is 246.4746 g/mol

Molar mass of MgSO4 is 120.366 g/mol.

In MgSO4.7H2O, %MgSO4 = 120.366 / 246.4746 = 0.488 x 100 = 48.8

2.4g × (%MgSO4/100) = 2.4 x (48.8/100) =

2.4 x 0.48

= 1.2g MgSO4

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What is the mass of an atom with 14 protons, 11 neutrons, and 10 electrons?
A. 21 amu
B.
24 amu
C.
27 amu
D.
25 amu

Answers

Answer:

D. 25 amu

Explanation:

Answer:

D

Expla

14 NHÂN 1 + 11 NHÂN 1 = 25 AMU

a popular recipe for chocolate chip cookies requires 4.6 g of baking soda, nahco3. how many moles of baking soda are required for this recipe?

Answers

The answer states that this recipe needs 0.055 moles of sodium bicarbonate.

What is the purpose of baking soda?

Cakes, cupcakes, and cookies are baked foods that contain baking soda as a leavening agent. It is a white, powder that is innately basic or alkaline and is formally known at sodium bicarbonate. When mixed with an acidic component and a liquid, sodium bicarbonate is activated.

Briefing:

We know,

Molecular weight of Baking Soda is 84gm (moles)

Now requirement = 4.6gm

So, moles required = 4.6/Mw

= 4.6/84 = 0.0548 moles ≅ 0.055 moles

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The equation shows reactants to a neutralization reaction. ca2 ohâ€"" h no which describes what will happen to the h when these reactants form products? h binds with no to make a salt. h binds with ca2 to make an acid. h binds with ohâ€"" to make water. h binds with ca2 to make a base.

Answers

Reactants for a neutralization reaction are shown in the equation. When these reactants produce products, H+ will be released and will bind with OH- to form water.

What is neutralization reaction?

In a neutralization reaction, which takes place when an acid and a base react to produce water and a salt, the interaction of H+ ions and OH- ions results in the production of water. The neutralization of a strong acid and strong base yields a pH of 7. Neutralization or neutralisation is the quantitative chemical reaction between an acid and a base. Hydroxide or surplus hydrogen ions are eliminated from the solution by neutralizing the reaction in water.

What is a neutralization reaction example and why it is used?

Strong acid and strong base reactions produce a salt that is neither acidic nor basic in nature, or neutral. For instance, sodium chloride and water are produced when HCl (hydrochloric acid), a powerful acid, combines with NaOH, a powerful base.

Taking a base balances out our stomach's excess acid. Due to the formic acid in the ant sting, it can be painful. Using moist baking soda, which is basic in nature, we can counteract this acid effect and lessen the pain brought on by the sting.

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Write covalent bonding in nitrogen and nitrogen​

Answers

Answer:

Explanation:

When two atoms share one electron pair, they are said to be joined by a single covalent bond.

In a nitrogen molecule, each nitrogen atom has five valence electrons.

Two nitrogen atoms are connected via a triple covalent bond.

Which of the answer choices is a form of nitrogen that can be utilized by plants?
Please choose the correct answer from the following choices, and then select the submit answer button.
NO3-
N2
NO2-
None of the other answer options is correct.
NH4+

Answers

NO3 is a form of nitrogen that can be utilized by plants.

What is an NO3?

The chemical formula for the polyatomic ion nitrate is NO3. The word "nitrates" refers to salts that include this ion. Many fertilizers and explosives have nitrates as a component. Water can dissolve almost all inorganic nitrates.

What is an nitrogen?

In Group 15 [Va] of the periodic table, nitrogen (N) is a nonmetallic element. The most prevalent element in the atmosphere of Earth is this colorless, flavorless, and odorless gas, which is also a component of all living things  nitrogen.

Therefore, NO3 is correct answer.

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the initial temperature of 100.0 ml of water was 23 oc. the water was then heated to 87 oc. how much heat (in j) was required for this temperature change?

Answers

The heat was required for his temperature change  26752 J.

given that :

volume : 100 mL

The initial temperature = 23 °C

The final temperature = 87 °C

ΔT = 87  °C - 23  °C = 64 °C

density = mass / volume

mass = density × volume

         = 1 × 100

         = 100 g

the specific heat expression is given as :

Q = m c ΔT

where,

specific heat capacity , c = 4.18 J/g °C

mass of water , m = 100 g

change in temperature , ΔT = 64 °C

Q = 100 × 4.18 × 64

Q = 26752 J

Thus, the initial temperature of 100.0 ml of water was 23 °C . the water was then heated to 87 °C .heat (in j) was required for this temperature change is 26752 J.

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if 3.33 mol3.33 mol of an ideal gas has a pressure of 2.11 atm2.11 atm and a volume of 60.51 l,60.51 l, what is the temperature of the sample in degrees celsius?

Answers

The temperature of the sample in degrees celsius is 238.89ºC.

The ideal gas equation can be rewritten to demonstrate that the pressure of a sample of gas is directly proportional to the number of moles of the gas present if volume and temperature are held constant:

deal Gas Law

PV = nRT

P = pressure = 2.10 atm

V = volume = 77.27 L

n = moles = 3.86

R = gas constant = 0.0821 Latm/Kmol

T = temperature in Kelvin = ?

Solving for T:

T = PV/nR = (2.10)(77.27)/(3.86)(0.0821)

T = 512.04 K

To convert to ºC, subtract 273.15K

T = 512.04 - 273.15 = 238.89ºC

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