What is the mass, in grams, of 6.82 L of nitrogen monoxide at STP? R = 0.0821 L atm / mol K

Answers

Answer 1

Answer:

Answer: 9.13g NO

Explanation:

First, I list what I know, which is the values of STP, the volume, the constant R, and the molar mass of NO; I also include what I'm looking for, which is n, the number of moles of NO.

STP = 273.15K, 1 atm

P = 1 atm

V = 6.82L

R = 0.0821 L*atm/mol*K

T = 273.15K

n = ?

NO mass: 30.01 g/mol

Then, I use the ideal gas law, PV = nRT, to find the number of moles of NO:

(1 atm)(6.82 L) = n( $(0.0821 L*atm)/(mol*K)$ )(273.15K)
(1 atm)(6.82 L) = n( $(22.43 L*atm)/(mol)$ )
(1 atm)(6.82 L) / ( $(22.43 L*atm)/(mol)$ ) = n => divided both sides by 22.4L*atm/mol
n = 0.304 mol NO

Then, I use the molar mass of NO, 30.01 g/mol, to convert from mol NO to g NO:

g NO = 0.304 mol NO( $(30.01g NO)/(mol NO)$ )
= 9.13 g NO

I hope this helps! :)

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Determine the percent yield for the reaction between 46.5 g of ZnS and 13.3 g of oxygen if 18.l4 g of ZnO is recovered along with an unknown quantity of sulfur
dioxide.
please show work thank you

Answers

The percentage yield of the reaction has been 46.74%.

Percentage yield can be given as the ratio of the actual yield to the theoretical yield.

For the theoretical yield, the balanced equation will be:

$\rm 2\;ZnS\;+\;3\;O_2\;\rightarrow\;2\;ZnO\;+\;2\;SO_2$

Thus, 2 moles of ZnS will give 2 moles of ZnO.

The moles of 46.5 g ZnS:

Moles = $\rm (weight)/(molecular\;weight)$

ZnS = $\rm (46.5)/(97.474)$

ZnS = 0.477 mol

The moles of 13.3 grams Oxygen:

Oxygen = $\rm (13.3)/(32)$

Oxygen = 0.415 mol.

The moles of 18.14 grams ZnO:

ZnO = $\rm (18.14)/(81.38)$

ZnO = 0.222 mol

According to the balanced chemical equation,

2 moles ZnO = 2 moles ZnS

0.222 mol ZnO = 0.222 mol ZnS

2 moles ZnO = 3 moles Oxygen

0.222 mol ZnO = 0.334 mol of Oxygen

Since, both the reactants are in enough concentration,

The theoretical yield can be calculated with any of the reactants. The theoretical yield of ZnO from 46.5 grams of ZnS can be given as:

1 mole ZnS = 1 mol ZnO

0.477 mol of ZnS = 0.477 mol of ZnO.

The mass of 0.477 mol of ZnO:

Mass = moles $*$ molecular weight

Mass of ZnO = 0.477 $*$ 81.38

Mass of ZnO = 38.818 grams.

The theoretical yield of ZnO = 38.818 g.

The actualyield of ZnO = 18.14 g.

Percentage yield = $\rm (18.14)/(38.81)\;*\;100$

Percentage yield = 46.74 %

The percentage yield of the reaction has been 46.74%.

For more information about the percentage yield, refer to the link:

brainly.com/question/11715808

Found an answer sheet :)

2NaCl + H2SO4 --> 2HCl + Na2SO4How many grams of HCl can be prepared from 2.00 mol H2SO4 and 2.56 mol NaCl?

a. 7.30 g
b. 93.3 g
c. 146 g
d. 150 g
e. 196 g

Answers

$\frac{2.00}1=2.00,(2.56)/(2)=1.28<2.00$ hence NaCl is the limiting reagant.

One mole of NaCl yields one mole of HCl, hence we'll make at most $2.56*(1.00+35.5)=93.4g$

That would be answer B (the difference probably comes from the molar mass of Cl that I chose, 35.5, whereas some prefer to take 35.4)

Final answer:

The question tackles stoichiometry, a Chemistry concept used to calculate reactant or product amount. Given 2 moles of H2SO4 and 2.56 moles of NaCl, the H2SO4 is limited, resulting in 4 moles of HCl. The weight of 4 moles of HCl is 146 g, thus, the answer is c. 146 g.

Explanation:

The subject of this question is stoichiometry, a method used in Chemistry to calculate the amount of reactants or products in a particular chemical reaction. According to the balanced equation, 2 moles of NaCl react with 1 mole H2SO4 to yield 2 moles of HCl. Meaning, 1 mole of H2SO4 can only react effectively with 2 moles NaCl. However, we have 2.56 mol of NaCl. This means that the H2SO4 is the limiting reagent. Thus, 2 mol H2SO4 will yield 4 mol of HCl (since it's 2:2 ratio).
The molecular weight of HCl is 36.5 g/mol. Therefore, the weight of 4 moles of HCl is 4 mol * 36.5 g/mol = 146 g. Thus, the correct answer is c. 146 g.

Learn more about Stoichiometry here:

brainly.com/question/30218216

#SPJ11

How many atoms are in 5 moles of CH4

Answers

molar mass CH4 = 12 + 1 . 4 = 16 g/mol

1 mole CH4 ------------ 16 g
5 moles CH4 ---------- x g

x = 5 . 16

x = 80 g

16 g CH4 ------------------ 6,02.10²³ atoms
80 g CH4 ------------------ y atoms

16 . y = 80 . 6.02x10²³

16 y = $4,81.10 ^(25)$

y = $(4,81.10 ^(25) )/(16)$

y = $3,01.10 ^(24)$ atoms

hope this helps

A change of phase never accompanies a. a change in volume b. a change in pressure
c. a change in temperature
d. a change in density
e. a change in structure

Answers

(b) there will be no change in pressure

Why must soft iron be used with an electromagnet?

Answers

The soft iron inside the coil makes the magnetic field stronger because it becomes a magnet itself when the current is flowing. Soft iron is used because it loses its magnetism as soon as the current stops flowing.

Answer: it is easily magnetized

Explanation:

Look at this picture of a whale shark.Which question about whale sharks is nonscientific?

A) What do whale sharks eat?

B) How big is the average whale shark’s mouth?

C) Does a whale shark like having a large mouth?

D)What happens to the water that enters a whale shark’s mouth?

Chemistry Honors College level

10th grader

Answers

Answer:

The nonscientific question about whale sharks is

C) Does a whale shark like having a large mouth?

This question asks for the subjective preference of a whale shark, which cannot be determined scientifically since we cannot directly communicate with the animal. Scientific questions are typically based on observable facts and measurable data.

Explanation:

Have a good day <3

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