The number of kilowatt-hours of electricity required to produce 4.60kg of metallic sodium from the electrolysis of molten NaCl(s) is 3.13 kWh when the applied emf is 4.50V
An equation for the reaction can be given as follows;
[tex]Na^{+} + e^{-} ---- > Na (s)[/tex]
Hence, the moles of Na is equal to the moles of electron used
Therefore, we can calculate the number of moles of sodium as follows;
No of moles = mass ÷ molar mass
No of moles = 4600 g ÷ 23 g/mol (As 1 kg = 1000 g)
No of moles = 200 mol
As Q = n × F; where F represents Faraday's constant
Q = 200 mol × 96500 C
Q = 19,300,000 mol C
The relation between electrical energy and Q is as follows;
E = Q × V
Now we can substitute the given values into the above formula and then calculate the value of electricity as follows;
E = 19,300,000 × 4.50
E = 86,850,000 J
As 1 J = 2.77 × 10^-7 kWh
Therefore;
86,850,000 ÷ 2.77 × 10^-7 kWh = 3.13 kWh
Hence, we can conclude that 3.13 kilowatt-hours of electricity is required to produce 4.60kg of metallic sodium from the electrolysis of molten NaCl(s)
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Can anyone solve this? Thank you
There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore radioactive decay of lead leads to production of bismuth. the blank can be filled with 210 and 82.
What is nuclear decay?Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.
The balanced reaction can be written as
²¹⁰Pb [tex]_x[/tex] [tex]\rightarrow[/tex] 83[tex]Bi^y[/tex] + ⁰₋₁ e
sum of mass number of reactant side=total sum of mass number of product
210=y+0
y=210
sum of atomic number of reactant side=total sum of atomic number of product
x=83+(-1)
x=83-1
x=82
Therefore radioactive decay of lead leads to production of bismuth. the blank can be filled with 210 and 82.
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Adding NH3 to the stack gases at an electric power
generating plant can reduce NOx emissions. This
selective noncatalytic reduction (SNR) process depends on the
reaction between NH2 (an odd-electron compound) and
NO.
NH2 + NO --> N2 + H2O
The following kinetic data were collected at 1200 K.
Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1
What is Rate of Reaction?
The rate of reaction in a chemical reaction is the speed at which the products are formed from the reactants. It helps us comprehend how rapidly a reaction might happen. For instance, cellulose burns exceedingly quickly in fire and the process is complete in less than a second.
The rate of reaction, also known as reaction rate, is the rate at which reactants transform into products. It should go without saying that different chemical reactions occur at different rates. While certain chemical reactions take place extremely immediately, others usually take some time to reach their final equilibrium.
Rate of reaction = k [NH 3] x [NO] y, where k is the reaction's rate constant, x is the order of the reaction with respect to NH 3, and y is the order of the reaction with respect to NO
Rate of reaction = k [NH 3 ] [ NO ]
Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1
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A veterinarian prescribed 1,500 mg of glucosamine (C6H13NO5) to a golden retriever with an arthritic hip. How many moles is the dog taking each day?
Answer:
30 pts
Explanation:
Identify indicators of a chemical reaction. Check all of the boxes that apply.
Two clear liquids are combined. A green solid forms.
color change
absorption of heat
formation of precipitate
formation of gas
Blobs of green solid are shown in clear liquid in a test tube.
Answer:color change and formation of precipitate.
Explanation: The reaction of products of the chemical reaction may have different properties
the reaction for the oxidation of nh3 is given as: 4 nh3 5 o2 → 4 no 6 h2o under certain conditions the reaction will proceed at 29.8% yield of no. how many grams of nh3 must be made to react with excess oxygen to yield 70.5 g of no?
134g of NH3 is required to react with excess oxygen to make 70.5 g of NO
We need to prepare 70.5 of NO given that the percent yield is 29.8%. Therefore, the molar mass of NO is 30g/mol. Then, the number of moles of NO in 70.5g is given by,
Moles of NO = 70.5/30
Moles of NO = 2.35moles
The actual yield of NO is 2.35 moles. Then theoretical yield can be computed as follows,
The percent yield of NO=( actual yield of NO/theoretical yield of NO ) x 100
Theoretical yield of NO = (actual yield/percent yield/100)
On supplying the values we get,
Theoretical yield= 2.35/0.298
Theoretical yield = 7.88 moles
The reaction is given by
4NH₃+SO₂ ---------> 4NO + 6H₂O
4 moles of Ammonia are required to make 4 moles of NO. Then, moles of NO equals moles of NH₃ which is 7.88
Then molar mass of NH₃ = 17g/mol
Mass of NH₃ = molar mass x no of moles
Mass of NH₃ = 17x7.88
Mass of NH₃ = 134g.
Therefore 134g of NH3 is required to make 70.5g of NO.
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balance the following redox reaction if it occurs in acidic solution. what are the coefficients in front of h+ and fe3+ in the balanced reaction? fe2+(aq) + mno4-(aq) → fe3+(aq) + mn2+(aq)
Redox reaction if it occurs in acidic solution
Fe2+(aq) + MnO4(aq) ----> Fe3+ (aq) + Mn2+(aq)
1-
Fe+2---->Fe+3 ....oxidation
MnO4 ------> Mn2+ reduction
2- Balance the reaction by
Balance oxidation numbers by adding electrons.
Balance charge by adding H+ (acidic solutions) or OH- (basic solutions).
Balance H atoms by adding H2O. Balancing Redox Reactions
Fe2+(aq) ---> Fe3+(aq) + e-
MnO4-(aq) + 8H+(aq) + 5e- ---> Mn2+(aq) + 4H2O
3- Net equation
5Fe2+(aq) + MnO4-(aq) + 8H+(aq) ---> 5Fe3+(aq) + Mn2+(aq) + 4H2O
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the model illustrates a process by which a substance is taken up by a cell. which statements describe the process? select the correct answer. (1 point)
By engulfing molecules, cells absorb them through the process of endocytosis. The substance to be transported is caught in a tiny, inward deformation of the plasma membrane known as an invagination.
Pinocytosis is a process by which the cell absorbs the liquids along with dissolved small molecules. Pino means "to drink" in Greek. As a result of this process, the cell membrane folds forms tiny pockets and collects the cellular fluid and other dissolved materials.
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FILL IN THE BLANK. Accumulators use weights, ___, and compressed gas to provide the energy storage needed to perform their function in hydraulic circuit.
Accumulators store energy in order to carry out their duty in a hydraulic circuit using weights, water, and compressed gas.
What is Accumulators?An accumulator is a type of energy storage system that takes, stores, and then releases energy as needed. Some accumulators take in energy at a low rate over a long period of time and discharge it at a high rate over a brief period of time. The primary function of an accumulator in a CPU is as a register for holding interim logical or numeric data during multistep calculations. It serves as a temporary storage area for such calculations.
What are accumulators used for and its example?In addition to powering chassis suspensions and reducing pressure peaks, they are used to maintain pressure, store and recover energy, and dampen shock, vibration, and pulsations. Accumulators store a volume of fluid under gas pressure that can be re-fed into the hydraulic system as needed.
Variables called accumulaters are employed to combine data from various executors. For instance, this data may relate to data or API diagnosis, such as how many records are corrupted or how frequently a specific library API was used.
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What is the answer i will give brainllest
Answer: oxidation-reduction
Explanation:
what volume (ml) of the sweetened tea described in example 3.14 contains the same amount of sugar (mol) as 10 ml of the soft drink in this example?
0.75 volume (ml) of the sweetened tea described in example 3.14 contains the same amount of sugar (mol) as 10 ml of the soft drink in this example
It is given that the concentration of sugar in a soft drink is 0.375M It means 1L of soft drinks contains 0.375mol of sugar. Then,
1000mL = 0.375mol
1mL =0.375/1000
For 10ml
= 0.375 x 10^-3 x 10
= 0.00375mol sugar
Now, the concentration of sugar in sweetened tea is 0.05M.
This means 12 L solution (tea) contains 0.05mol of sugar.
Now, we need to find the volume of sweetened tea that has the same mass of sugar that is present in 10ml of soft drink
So, the required amount of sugar is 0.05 mol
0.05mol sugar = 1000ml (tea)
1 mol sugar = 1000/0.05 (tea)
So,
0.00375 mol sugar = (1000x 0.00375)/0.05
= 75.0 mL (tea)
The volume of tea required is 0.75ml
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With a pressure of 1.5 atm (atmosphere), a piston pushes in on the gas in a cylinder, compressing it from 5.1 L to 1.8 L. What is the work done on the gas (in joules)?
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, the work done on the gas (in joules) is 4.95 J.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
q = n ×ΔH
where
q = amount of heat
n = no of moles
ΔH = enthalpy
n = w / M.M
Work in thermodynamic= work done on the system =p×change in temperature
work done on the system= 1.5 atm×(5.1 L - 1.8 L. )
work done on the system=4.95 J
Therefore, the work done on the gas (in joules) is 4.95 J.
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extraction is the process of removing compounds from a solution by taking advantage of varying solubilities. the process of extraction for a mixture of diethylamine, phenol, acetic acid, and ammonia involves three steps. 1. add a strong acid and shake the solution. let the aqueous layer drain off. 2. add a weak base and shake the solution. let the aqueous layer drain off. 3. add a strong base and shake the solution. let the aqueous layer drain off.
Which of the four components would be the first to enter the aqueous phase in this extraction? o ethylbenzene o diethylamine o butanoic acid o phenol
In this extraction, acetic acid would be the first substance to mix with water.
How does extraction work?When a substance is "extracted," it is moved from a solid or liquid into a separate solvent or phase. The method most frequently used in chemical labs is liquid-liquid extraction, which takes place in a separatory funnel.
The funnel is filled with a dissolved component solution, an immiscible solvent is added, and the two layers are shaken together. It is most typical for one layer to be an organic solvent and the other to be an aqueous one. When components migrate from one layer to the next, they are "extracted."
By taking use of the different ways that different compounds are soluble in aqueous and organic solvents, extraction is the process of extracting specific components from a mixture.
Three steps are involved in the extraction process for a mixture of diethylamine, phenol, acetic acid, and ammonia. 1. Shake the mixture after adding a powerful acid. Ladder off the watery layer. 2. Include a weak base and stir the mixture. Ladder off the watery layer. 3. Add a solid base and stir the mixture. Ladder off the watery layer.
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A structure containing a central atom with two electron groups, designated ax2, has a _____ shape with a bond angle of _____ degrees.
A structure containing a central atom with two electron groups, designated ax2, has a linear shape with a bond angle of 180 degrees.
In a molecular formula, the center atom is often the one with the lowest subscript and the largest bonding potential. When all of the atoms typically form the same amount of bonds, the central atom is often the one with the lowest electronegative potential. Central ions are the metal ions that the ligands attach to. Example: The core ion in K3[Fe(CN)6] is Fe3+. As Lewis acids, these core atoms and ions serve as acceptors of the electron pair.
Since C is less electronegative than O, it serves as the main atom. 2. C contains four valence electrons, and each O has six, for a total of sixteen valence electrons.
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label the energy diagram. you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop.energy is plotted on the y axis versus the reaction coordinate on the x axis. the curve begins at an energy value approximately half way up the y axis. it then increases to a maximum before decreasing to a final energy that is less than the initial energy. there is a line measuring the vertical distance from the initial energy to the peak energy and a second line measuring the vertical distance from the initial energy to the final energy. answer bank
The reaction profile diagram shows the conversion of reactants to products.
What is the energy diagram?We know that the energy diagram is the diagram that is drawn to show the interaction between species as they move from the reactants to products. We can see that in the reaction profile the energy us plotted on he vertical axis and the reaction pathway is plotted on the horizontal axis.
Now the topmost part of the curve is the activated complex. The activation energy of the reaction is the line that terminates at the curve for the reactants. The corner at the left is for the reactants while the corner at the right is for the products. The enthalpy change is the difference between the energies of the reactants and the products.
All these are shown in the reaction profile attached here.
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A 0.50 M solution of sodium chloride in an open beaker sits on a lab bench. Which of the following would decrease the concentration of the salt solution?
Molarity of NaCl solution = 0.5 M Molarity or Concentration = Moles of solute / Volume of solution 0.5 M solutions of Sodium chloride means 0.5 moles of NaCl in 1 Litre of Sodium chloride solution. In order to decrease the concentration of the solution more water should be added to the solution.
What is Molarity?
Molarity or molar concentration is the number of moles of solute per liter of solution, which can be calculated using the following equation:
[tex]\text{Molarity}= \dfrac{\text{mol solute}}{\text{L of solution}}[/tex]
Molar concentration can be used to convert between the mass or moles of solute and the volume of the solution.
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the electronegativity value for mg is 1.2 and the value for o is 3.5. based on these values, what type of bond is expected for a compound formed between mg and o?
The electronegativity value for mg is 1.2 and the value for O is 3.5 based on these value ionic bond is expected to be formed between mg and o.
It is crucial to understand in this type of investigation that the higher the electronegativity value, the more likely it is that an ionic connection will form between the two elements.
Therefore, to demonstrate that an ionic bond should form between two elements, we need to know the difference in their electronegativity values. This query demonstrates that the electronegativity difference is rather substantial. As a result of this important distinction, it is anticipated that an ionic bond will form. If their strengths are comparable, covalent bonds are possible.
The main interaction in ionic compounds is ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with sharply different electronegativities.
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Drag each tile to the correct location. identify the reactants and the products in this chemical equation. 2fe2o3 3c → 4fe 3co2 c co2 fe fe2o3
On the left side of the chemical process, the reactants are Fe2O3 and C. On the right side of the chemical process, the products are Fe and CO2.
Which of the following claims regarding the response listed below is true: 4Fe(s) + 3O2(g) → 2Fe2O3(g)Because the total mass of iron and oxygen in the reactants and the product are equal, the law of conservation of mass is observed.
How can reactants be recognized?In a chemical equation, the substance or substances to the left of the arrow are referred to as reactants. When a chemical reaction first begins, a substance is said to be the reactant.
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what is oxidation? what is reduction? what are the oxidation states of cu and zn (both species) in the following reaction: cu2 (aq) zn(s) → cu(s) zn2 (aq) what is oxidized? what is reduced?
Oxidation: Oxidation is the loss of electrons during a reaction by a molecule, atom or ion.
Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.
Reduction: Reduction involves a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox). Reduction may be considered the opposite process of oxidation.
Cu(aq) + Zn(s) = Cu (s) + Zn2+ ( aq)
(2+) (0) ( 0) (2+)
In this reaction, Zn is oxidised and Cu is reduced.
What do you mean by redox reaction?
Redox reactions are oxidation-reduction chemical reactions in which the reactants undergo a change in their oxidation states. The term ‘redox’ is a short form of reduction-oxidation. All the redox reactions can be broken down into two different processes – a reduction process and an oxidation process.
The oxidation and reduction reactions always occur simultaneously in redox or Oxidation-Reduction reactions. The substance getting reduced in a chemical reaction is known as the oxidizing agent, while a substance that is getting oxidized is known as the reducing agent.
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enantioselective total synthesis of the antifungal natural products chlorotetaine, bacilysisn, and anticapsin and of related compounds: revision of the relative configuration
Three antimicrobial compounds produced by the Bacillus sp. strain Csat isolated from pozol were identified by using the high-performance liquid chromatography and the mass spectrometry.
The three compounds were iturin, bacilysin, and chlorotetaine. Production of these compounds by CS93 could account for the medicinal properties
attributed to the pozol.
Antifungal drugs work to treat fungal infections. It can kill the fungus directly or it can prevent the growth and reproduction of the fungus.
Antifungals are available over-the-counter or by prescription and come in a variety of forms, including: creams and lotions.
Thyme, cinnamon, oregano, clove, and mint are all some examples of these kinds of oils.
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Equilibrium calculations: Using the equation below for calculating the equilibrium constant for the reaction of PCl3 + Cl2 to produce PCs, make the following substitutions for the reactants and products, and recalculate the equilibrium constant, then comment on the equilibrium constant does it favor products, or reactants? [PCI) = 5.0 mol/L [Cl2] = 5.0 mol/L [PC1s] = 0.1 mol/L [PCI ] 0.050 mol/L K= 9.6 x 10-4 [PC13 ][CI] (7.2 mol/L) (7.2 mol/L) For the steam reformation reaction CH + H2O + CO + 3 H2, calculate the equilibrium constant using the formula and concentrations below, and comment on the equilibrium constant: does it favor products, or reactants? What do you think is the industrial use of this chemical reaction?
The equilibrium constant is 12.5.
The equilibrium constant of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by means of a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency towards in addition trade.
The equilibrium consistent of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency in the direction of further trade.
Calculation:-
CH₄ + H₂O ---------> CO + 2H₂
[CO] = 10⁻² mol/L
= 0.01 mol/l
[H₂] = 5 × 10⁻¹ mol/l = 0.5 mol/l
[H₂O] = 10⁻² mol/l = 0.01 mol/l
[CH₄] = 10⁻² mol/l = 0.01 mol/l
K = [CO][H₂]³/[CH₄][H₂O]
= (0.01) × (0.5)³/(0.01)×(0.01)
Kc = 12.5
Equillibirium constant = 12.5
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when an alkene is subjected to treatment with hg(oac)2 in ch3oh followed by reaction with nabh4, what new class of compound is formed?
An alcohol is created when an alkene undergoes treatment with hg(oac)2 in ch3oh, followed by a reaction with nabh4.
What are the uses of alkene?One of the most adaptable chemical building blocks, alkenes are essential to numerous synthetic reactions. Alkene reactants are used in hydro functionalization processes such olefin hydroalkoxylation and hydroamination, which is a very active area of catalysis.
Alkene vs. alkane: what are they?Alkanes are saturated hydrocarbons because they only have one bond between the carbon atoms. Alkenes have at least one double bond between carbon atoms. Alkynes have one or more triple bonds between carbon atoms. Unsaturated hydrocarbons are the name given to alkenes and alkynes.
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Marcus Theory Intramolecular electron transfer from biphenyl radical anion across a steroid scaffold was investigated with a series of electron acceptor moieties (A). a. Draw a plot ofΔG0vskETb. Based on your plot, estimate the reorganization energy(λ)for this set of electron transfer reactions. Please explain your answer c. Which acceptor moieties lie in the Marcus inverted region for electron transfer? d. Acceptors 3-7 belong to a class of quinone, and important electron acceptor in biology. Draw a Lewis dot structure of5−, a one electron reduction product of 5.
Rudolph A. Marcus created the Marcus hypothesis in theoretical chemistry to explain the speeds of electron transfer processes starting in 1956.
the speed at which an electron can transfer or jump from a chemical species (referred to as the electron donor) to another (called the electron acceptor). Rudolph A. Marcus created the Marcus Hush theory (M-H theory) in 1956. It describes the foundations of redox/ electron transfer processes in terms of the rate at which an electron jumps/moves from an oxidant species (electron donor) to the reductant (electron acceptor). When the free energy is equal to the reorganisation energy and is in the opposite direction, the maximum rate constant for electron transfer occurs. Keep in mind that the reorganisation energy is positive and the free energy for a spontaneous electron transfer is negative.is favourable. In addition to the structural changes mentioned above, substitution, elimination, and isomerization reactions differ from outer sphere redox reactions in that nuclear configurations and charge distribution are always "in equilibrium" and that nuclear movements and charge shifts (charge transfer, CT) occur continuously and concertedly on the reactions path. This is demonstrated by the SN2 substitution of the saponification of an alkyl halide, where a transition state containing a five-coordinated carbon atom must be viewed and where the rear side assault of the OH ion pushes out a halide ion.
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The chemical properties of atoms, ions, and molecules are related to the arrangement of the _______ within them.
Answer: Protons
Explanation:
Protons is the answer because they are unchanging and cannot move compared to electrons.
how many milliliters of a 0.900% (m/v) normal saline solution can be prepared from 2.50 g of sodium chloride, nacl ? note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v).
0.0225 ml of a 0.900% (m/v) normal saline solution can be prepared from 2.50 g of sodium chloride, nacl . note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v).
C = m/V
0.009 = m/V
0.009 = 2.5/V
V = 2.5/0.009 = 0.0225 ml
To help prevent heat cramps brought on by excessive sweating, sodium chloride is used as an electrolyte replenisher. The normal isotonic solution of sodium chloride can also be made using this medication. This medication is accessible over-the-counter.
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7.93 mol of c5h12 reacts with excess o2, how many moles of co2 will be produced by the following combustion reaction?
The following combustion of fuel will result in the production of 39.65 moles, claims the statement.
What is a mole, exactly?A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the high number of electrons, molecules, or other components that make up any substance, the mole is a useful measure to utilize. The mole was initially defined as the quantity of atoms contained in 12 grams of co2, but the General Assembly on Measurement and Weights declared in 2018 that the mole will only contain 6.02214076 1023 of some scientific unit as of May 20, 2019.
Briefing:C₅H₁₂+8O₂→6H₂O+5CO₂
From the equation, we see that 1 mole of C₅H₁₂ reacts with excess of O₂ to produce 5 moles of CO₂.
So, 7.93 moles of C₅H₁₂ will react with excess O₂ to produce (7.93*5) moles = 39.65 moles.
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for molecules with only one central atom, how many pairs isolated in the central atom guarantee molecular polarity?
for molecules with only one central atom, only one pair isolated in the central atom guarantee for molecular polarity.
what is molecular polarity?When a molecule, which can be made up of multiple covalent bonds, has a net polarity, one end has a higher concentration of negative charge and the other end has an excess of positive charge, this is referred to as molecular polarity.
What are the types of molecular polarity?The projected degree of polarity in the bond and, subsequently, the type of connection, are generally indicated by the absolute value of the difference in electronegativity (EN) between two linked atoms. A covalent, nonpolar bond develops when the difference is extremely small or nonexistent. When the bond is large, it is either ionic or polar covalent.
What increases molecular polarity?An rising differential in electronegativity is accompanied by an increase in bond polarity and ionic character. The electrons in compounds with polar covalent bonds are distributed unevenly among the bound atoms. The respective electronegativities of the bound atoms have a significant role in determining the polarity of such a connection.
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a sample of chlorine gas is confined in a 5.0 l container at 328 torr and 37 o c. how many moles of gas are in the sample?
The number of moles of gas in the sample is 0.0862 mol which can be calculated using ideal gas law.
An ideal gas is one that follows all the gas laws at every temperature and pressure condition. A real gas is referred to as a gas that does not act like an ideal gas.
From ideal gas equation, it is stated that
PV=nRT
Here, P represents the pressure of gas, V represents the volume of the gas, T represents the temperature, R is the gas constant and n is the number of moles.
It is given that, Volume of gas is 5.0 L, Pressure is 328 torr and the temperature is 37°C. The number of moles can be calculated as follows:
PV=nRT
328 torr*5.0 L=n*62.364 L Torr/mol/K*(32+273) K
n=328 torr*5.0 L/62.364 L Torr/mol/K*305 K
n=1640/19021.02 mol
n=0.0862 mol
Thus, the moles of gas are 0.0862 mol.
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which of the following aqueous solutions has the highest boiling point? question 3 options: 0.15 m nacl 0.10 m cacl2 0.15 m ba(no3)2 0.20 m nh3 0.10 m al(no3)3
Among the following given options Ba₂(NO₃)₂ has the highest boiling point.
The boiling point of a solvent increases due the addition of a solute in the solvent and it follows the formula:
ΔT = K × m × i
Where K represents the boiling point increasing constant (Depends of the solute), m is molality = molarity when solvent is water, and i is Van't Hoff factor.
This implies that the compound with the higher m × i will be the solution with the highest boiling point,
a. NaCl has i = 2 (NaCl dissociates in Na⁺ and Cl⁻ ions).
m × i = 0.15 × 2 = 0.3
b. CaCl₂; i = 3. (3 ions).
m × i = 0.10M × 3 = 0.3
c. Ba₂(NO₃)₂ dissolves in 5 ions. i = 5
m × i = 0.15 M × 5 = 0.75
d. NH₃ has i = 4:
m × i = 0.2M × 4 = 0.8
e. Al₂(NO)₃ : i = 5
m × i = 0.10 × 5 = 0.5
Hence, the m × i value of Ba₂(NO₃)₂ is highest so it has the highest melting point.
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assuming the magnesium ribbon wasn’t sufficiently polished to remove a coating of magnesium oxide on the surface. how would this affect the volume of hydrogen gas produced? would this error cause r to be overestimated, underestimated, or remain unaffected? explain your reasoning.
The volume of hydrogen gas produced by Magnesium reacts with the oxygen present in the air to form magnesium oxide.
When stored, it reacts with oxygen and forms a layer of magnesium oxide on the surface. This layer of magnesium oxide is very stable and prevents further reactions between magnesium and oxygen. Clean the magnesium ribbon with sandpaper to remove this layer and expose the underlying metal to the air.
Cleaning the surface of the magnesium ribbon removes the oxide layer from the surface and effectively burns the ribbon to the desired result. Magnesium ribbons burn in the air producing intense heat and bright white light. Magnesium ribbons must be air washed before firing because of the reaction between magnesium.
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What effect would the pressure in the Marianas Trench have on most animals and humans?
Answer: we would die
Explanation:
the pressure being so large would squash us flat.