What is the mass of 1.84 mol NaCl? Give your answer to the correct number of significant figures. (Molar mass of NaCl = 58.44 g/mol) 1.84 mol NaCl = g NaCl

Answer:

pseudoscience

Explanation:

srry that this is so late btw, hope this helps...

Answer:

Science

Explanation:

First response is NOT correct

Answer:

The answer to this is A. One kind of atom

Explanation:

The other options make no sense whatsoever. But enjoy.

I hope this helped.

Answer:

A. One kind of atom

Explanation:

Answer:

Explanation:

4). Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2Na(NO₃)₂

  This question is incorrect.

  Since, the final product by reacting Na⁺⁺ and NO₃⁻⁻ is NaNO₃

  Correct equation will be,

  Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2NaNO₃

  This equation is in the balanced form.

5). Ni(NO₃)₂ + KI → NiI + 2K(NO₃)₂

  Correct equation will be,

  Ni(NO₃)₂ + KI → NiI₂ + 2KNO₃

  [Since final product by reacting Ni⁺⁺ and I⁻ is NiI₂]

  Balanced form of this equation will be,

  Ni(NO₃)₂ + 2KI → NiI₂ + 2KNO₃

6). Ni(NO₃)₂ + KOH → NiOH + K(NO₃)₂

   Correct form of the equation will be

   Ni(NO₃)₂ + KOH → Ni(OH)₂ + KNO₃

   [Since reaction of Ni⁺⁺ and OH⁻ gives Ni(OH)₂ and the reaction of K⁺ and NO₃⁻ gives KNO₃]

   Now balancing this equation,

   Ni(NO₃)₂ + KOH → Ni(OH)₂ + 2KNO₃

                              ↓

  Ni(NO₃)₂ + 2KOH → Ni(OH)₂ + 2KNO₃

Answer:

A. Supersaturated

Explanation:

i got it right on edge 2021

The heated solution that holds more dissolved solution than it can hold at a lower temperature is supersaturated solution. Therefore, option A is correct.

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. By introducing a tiny solute crystal known as a seed crystal, the excess dissolved solvent in a super-saturated solution can begin to recrystallize.

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. A solution is considered supersaturated if it contains more solute than is necessary to saturate it.

A solution that contains more solute than it can hold at a specific temperature is said to be supersaturated. Usually, raising a solution's temperature causes more particles to dissolve, increasing the solute concentration.

Thus, option A is correct.

To learn more about supersaturated solution, follow the link;

https://brainly.com/question/1432936

#SPJ6

Answer: [tex]1.07\times 10^{23}[/tex] molecules

Explanation:

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 1 atm ( at STP)

V= Volume of the gas  = 4.00 L

T= Temperature of the gas in kelvin = 273 K ( at STP)

R= Gas constant = 0.0821Latm/kmol

n=  moles of gas= ?

Putting in the values we get:

[tex]1atm\times 4.00L=n\times 0.0821Latm/Kmol\times 273K[/tex]

[tex]n=0.178mol[/tex]

Now 1 mole of any substance contains [tex]6.023\times 10^{23}[/tex] molecules at STP

Thus 0.178 mole of any substance contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.178=1.07\times 10^{23}[/tex] molecules at STP

Thus there are [tex]1.07\times 10^{23}[/tex] gaseous molecules in the flask.

Answer:

Temperature, mass, and the type of material are factors that affect the thermal energy of an object.

Material with the higher specific heat will have more thermal energy than material with lower specific heat if they both have the same mass and temperature.

The thermal energy within the thing increases if the temperature remains constant but the object's mass rises.

If two materials have the same mass and temperature, the material with the greater specific heat will have more thermal energy than the material with the lower specific heat.

How does thermal energy transfer depend on the kind of material?

The speed at which thermal energy moves from one end of a substance to another determines thermal conductivity. Insulators transport thermal energy slowly while conductors transfer thermal energy quickly.

The thermal energy within the thing increases if the temperature remains constant but the object's mass rises.

Conduction, convection, or radiation are all ways that thermal energy can be moved from one location to another.

To learn more about energy refer to:

https://brainly.com/question/26520543

#SPJ2

Answer: because ch4 is not considered a acid they said it is too weak

Explanation:

Answer:

+ 100 Kj

Explanation:

The very minimum energy required to activate atoms or molecules to undergo chemical transformation.

Answer:

It is 60kj.

Explanation:

It is the highest point minus where a+b is at, so it is 60kj.

Answer:

Oxidation with FAD is more favorable energetically.

Explanation:

With FAD as the electron acceptor;

∆E'° = (E'° from reduction reaction) – (E'° from oxidation reaction)

∆E'° = (-0.219) - 0.031 = -0.25 V

The standard free energy change, ∆G'° = -nF∆E'° ; where n is number of moles of electrons = 2, F is Faraday's constant = 96.5 KJ/V.mol

∆G'° = -2 × 96.5 KJ/V.mol × (-0.25)

∆G'° = 48.25 KJ/mol

With NAD+ as electron acceptor

∆E'° = (E'° from reduction reaction) – (E'° from oxidation reaction)

∆E'° = (-0.320) - 0.031 = -0.351 V

The standard free energy change, ∆G'° = -nF∆E'° ; n = 2, F = 96.5 KJ/V.mol

∆G'° = -2 × 96.5 KJ/V.mol × (-0.351)

∆G'° = 67.74 KJ/mol

From the above values obtained, the oxidation by FAD is more favorable energetically as the free energy is less positive than with NAD+

Answer:

The enzyme's active site must be the mold shape of the substrate.

Explanation:

An enzyme and a substrate bind together in order to work. If the shapes of the 2 are different, they will not be able to bond together. If the shapes of the 2 fit glove-in-hand, then they will be able to bond together.

Answer:

The answer is option B.

Hope this helps you

Answer:

equal number of electrons and protons

Explanation:

electron is negatively charged and proton is positively charged for an atom to stay neutrality # of electrons and protons must be equal.

Answer:

Option C. 8.91g

Explanation:

The balanced equation for the reaction is given below:

2Pb(NO3)2 —> 2PbO + 4NO2 + O2

Next, we shall determine the mass of Pb(NO3)2 that decomposed and the mass PbO produced from the balanced equation.

This is illustrated below below:

Molar mass of Pb(NO3)2 = 207 + 2[14 + (16x3)]

= 207 + 2[14 + 48]

= 207 + 2[62] = 207 + 124

= 331g/mol

Mass of Pb(NO3)2 from the balanced equation = 2 x 331 = 662g

Molar mass of PbO = 207 + 16 = 223g/mol

Mass of PbO from the balanced equation = 2 x 223 = 446g

Summary:

From the balanced equation above,

662g of Pb(NO3)2 decomposed to produce 446g of PbO.

Finally, we can obtain the maximum mass of lead(II) oxide, PbO produced from 13.23g of lead (II) nitrate, Pb(NO3)2 as follow:

From the balanced equation above,

662g of Pb(NO3)2 decomposed to produce 446g of PbO.

Therefore, 13.23g of Pb(NO3)2 will decompose to produce = (13.23 x 446)/662 = 8.91g of PbO.

Therefore, 8.91g of PbO were obtained from the decomposition of 13.23g of Pb(NO3)2

Tetraamminedichloridoiron(3) nitrate

Answer:

b

Explanation:

a drug problem consumes the bulk of a persons income because drugs are expensive to buy

A drug problem can quickly consume the bulk of a person income

A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drug abuse or substance abuse refers to the use of certain chemicals for the purpose of creating pleasurable effects on the brain.

Drug use can have significant and damaging short-term and long-term effects. Taking some drugs can be particularly risky, especially if you take high doses or combine them with other drugs or alcohol.

People of any age, sex or economic status can become addicted to a drug. Certain factors can affect the likelihood and speed of developing an addiction.

The best way to prevent an addiction to a drug is not to take the drug at all. If your doctor prescribes a drug with the potential for addiction, use care when taking the drug and follow the instructions provided by your doctor. Thus you can save your income.

The correct answer is option B.

Learn more about drug problem, refer:

https://brainly.com/question/23284149

#SPJ2

Answer:

glamorize

Explanation:

There are many stories about celebrities being on drugs, and the media seems to deliver the stories in a way that acts as drugs are beneficial and further glamorizes them.

News coverage tends to glamorize drug use.

An examination performed by the national middle on addiction and Substance Abuse at Columbia college discovered that young adults who frequently use popular social media outlets have been more likely to drink, use pills, and buy tobacco than adolescents who both did no longer use social media or used it less regularly.

The effects display that the media impact on the human populace cannot exchange the stabilities of equilibria however can affect the number of drug addicts. Sensitivity analyses are performed to search for powerful control measures for drug treatment.

Learn more about drug use here https://brainly.com/question/26254731

#SPJ2

Answer:

Option B.

Kb = [CH3NH3+] [OH-] / [CH3NH2]

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CH3NH2(aq) + H2O(l) <=> CH3NH3+(aq) + OH- (aq)?

The expression for the equilibrium constant, Kb is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

Thus, the expression for the equilibrium constant, Kb fo th above reaction can be written as follow:

Kb = [CH3NH3+] [OH-] / [CH3NH2]

Option B gives the correct expression for Kb.

Answer:b

Explanation:AP EX

Answer:

A

Explanation:

The purpose of the periodic table was to organize elements as they were discovered into periods and groups, according to their properties. It was not just a naming of elements, as a list.

The purpose of the periodic table was to organize elements as they were discovered. Thus option A is correct.

Periodic table is defined as an arrangement of all known elements in order of increasing atomic number and recurrent chemical attributes.

It can also be defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.

It helps us to learn about an ordered grouping of the 118 known chemical elements.

The periodic table contains alkali metal, alkaline earth metal, transition elements, noble gas, post transition element etc. and many more elements are arranged in periodic table in groups.

Thus, the purpose of the periodic table was to organize elements as they were discovered. Thus option A is correct.

To learn more about periodic table, refer to the link below:

https://brainly.com/question/11155928

#SPJ5

Answer:

Alkaline earth metals

Explanation:

Group 2 has 2 valence electrons that they lose when being ionized, thus making  their charge 2+.

Answer:

alkali earth metals

Explanation:

ed tell chem

Answer:

About 19.64 pounds of carbon dioxide are produced from burning a gallon of gasoline. On the other hand, 22.38 pounds of carbon dioxide are produced from burning a gallon of diesel. So, different fossil fuels will give different amounts of carbon dioxide to be released.

Explanation:

Answer:

B

Explanation:

Please take a look at the picture attached for the drawings and structures.

C2H4 is a alkene (C-C double bond). When steam (water) is added, it turns into an alcohol, where the double bond breaks and a (-OH) functional group is attached to one of the Carbons. In this case, C2H4 ethene is turned into ethanol.

When an alcohol undergoes oxidation, primary alcohols turn into aldehyde (-CHO) or carboxylic acids (-COOH). Secondary alcohol turns into ketone. Ethanol is a primary alcohol. And since it later reacts with propanol, it can only form carboxylic acid when it oxidizes. The product in this reaction is ethanoic acid.

Carboxylic acid reacts with alcohol to form an ester (-COO-). the -COOH group from acid combines with the -OH group from alcohol to form an ester bond -COO- while eliminating H2O. Therefore, when propanol undergoes esterification with ethanoic acid, propyl ethanoate is produced. It is the answer of B.

Answer:

x = 25.02 or 25°c

Explanation:

Given:

mass of water : 7.50×10² =750 gm

Ccal = 8.20× 10² = 820 J/°c

Let assume final temp = x°c

then, heat gained by the water + heat gained by calorimeter

= 25400 J

⇒ Mw × Cw× ΔTw+ Ccal ×ΔT = 25400

⇒ 750× 4.184 × (x - 18.6) + 820 ×(x-18.6) = 25400

⇒ x = 25.02 or 25°c

Answer:

(c) 82%

Explanation:

Using the chemical reaction:

3CH₃OH + 4MnO₄⁻ → 3HCOOH + 4MnO₂ + 4e⁻

3 moles of methanol produce 3 moles of formic acid (Reaction 1:1)

To find the percent yield we need to calculate theoretical yield of the reaction when 12g of methanol (Molar mass: 32.04g/mol) are reacting, thus:

12g ₓ (1mol / 32.04g) = 0.3745 moles of methanol are in 12g.

As 1 mole of methanol produce 1 mole of formic acid, assuming a 100% of yield in the reaction (Theoretical yield) moles produced of formic acid are 0.3745 moles.

Using molar mass of formic acid (46.03g/mol), mass of the acid in 0.3745moles are:

0.3745 moles ₓ (46.03g/mol) = 17.2g of formic acid are theoretical yield

Percent yield is calculated as:

(actual yield / Theoretical yield) × 100

As actual yield of the reaction is 14g. Theoretical yield is:

(14g / 17.2g) × 100 = 81.2% ≈ 82%

Right answer is:

The percentage yield of the reaction is 82%

The correct answer to the question is Option C. 82%

We'll begin by writing the balanced equation for the reaction.

3CH₃OH + 4MnO₄⁻ → 3HCOOH + 4MnO₂ + 4e⁻

Molar mass of CH₃OH = 12 + (3×1) + 16 + 1 = 32 g/mol

Mass of CH₃OH from the balanced equation = 3 × 32 = 96 g

Molar mass of HCOOH = 1 + 12 + 16 + 16 + 1 = 46 g/mol

Mass of HCOOH from the balanced equation = 3 × 46 = 138 g

From the balanced equation above,

96 g of CH₃OH reacted to produce 138 g of HCOOH

From the balanced equation above,

96 g of CH₃OH reacted to produce 138 g of HCOOH.

Therefore,

12 g of CH₃OH will react to produce = (12 × 138)/96 ≈ 17g of HCOOH.

Actual yield of HCOOH = 14 g

Theoretical yield of HCOOH = 17 g

Percentage yield = Actual / Theoretical × 100

Percentage yield = 14/17 × 100

The correct answer to the question is Option C. 82%

Learn more: https://brainly.com/question/25656650

Answer:

make reclamation compulsory after bauxite has been removed

Explanation:

Available options:

choose other infertile and uninhabited locations for bauxite mining

allow agriculture and mining to take place simultaneously in the location

ask farmers in the location to help in mining bauxite

make reclamation compulsory after bauxite has been removed

The correct option and the best plan to solve the problem of permanent dislocation of farmers would be to make reclamation compulsory after the bauxite has been removed.

Reclamation would involve restoring the agricultural land back to its original status prior to the commencement of bauxite mining. By doing this, the farmers can return to their farmland after being temporarily displaced due to the mining activities.

answer is b

please mark brainliest

option A is the correct one

It represents Mp orBp of a substance at a specific pressure

Answer:

A, a solution made by dissolving 60g of sodium hydroxide in 2000cm³

Explanation:

Concentration = no. of moles / volume (in dm³)

1 dm³ = 1000cm³

no. of moles = mass / molar mass

molar mass of NaOH = 23.0+16.0+1.0 = 40 g/mol

Let's find the concentration of each of the solutions:

A:

= 60/40 /2

= 0.75 mol/dm³

B:

= 40/40 /1

= 1 mol/dm³

C:

= 10/40 / 0.25

=1 mol/dm³

D:

= 20/40 / 0.5

= 1 mol/dm³

Since 0.75mol/dm³ is the lowest concentration out of 4, it is the most dilute.

Answer:  A.  1.07 x 10∧ -18 J

Explanation:

The energy can be calculated by using this relation; E = hc / ∧

Where E = energy

            h = Planck's constant = 6.626 x 10-34joules

            c  = speed of light =  3.00 x 10∧8 m/s

            ∧  = wavelenght  = 185 nm = 185 x 10∧ -9m

Therefore;  E=  hc / ∧

                     =  (6.626 x 10-34 j/s)  x  ( 3.00 x 10∧8 m/s)  /  185 x 10∧ -9m

                     =    1.987 x 10 ∧ -25 / 185 x 10∧ -9m

                     =  1.07 x 10∧ -18 J

Answer:A

Explanation:

They are very reactive is a characteristic property of halogen.

Hence, Option (A) is correct answer.

Halogens are non metallic elements in periodic table. It belongs to group 17 in the periodic table. Halogen family consists six elements that is Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At) and Tennessine (Ts).

Thus, from the above conclusion we can say that They are very reactive is a characteristic property of halogen.

Hence, Option (A) is correct answer.

Learn more about the Halogen here: https://brainly.com/question/2731466

#SPJ2