Free Printable Reactions, Mole Ratio, Mole Conversions Version A

Worksheets

Reactions, Mole Ratio, Mole Conversions Version A

Total questions: 51

Worksheet time: 2hrs 10mins

Name

Class

Date

Which of the following statements regarding the mole is INCORRECT?

A mole is a unit of quantity equal to 6.02 x 10²³ particles.

The number of particles in a mole is known as Avogadro’s number.

A mole of particles of an element is numerically equal to the atomic mass of the element.

none of the above

N₂ + 3H₂ --> 2NH₃
What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

6.7

2.0

3.0

15.0

2Na + S -->Na₂S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?

0.5

What is the mass of one mole of silver?

32.06 g

107.87 g

14.01 g

22.99 g

48.86 g of cobalt is equal to how many moles of cobalt?

2879 moles

8.291 moles

.8291 moles

.829 moles

How many molecules of water are in a 821.3 g sample?

45.58 molecules

8.232 x 10²⁵ molecules

8.909 x 10²⁷ molecules

2.744 x 10²⁵ molecules

How many formula units of calcium chloride are in a 25.69 g sample?

1.394 x 10²³ F.U.'s

2851 F.U.'s

.2315 F.U.'s

3.845 x 10²⁵ F.U.'s

Convert 86.235 g of diphosphorus pentaoxide to moles.

12240 moles

1.8747 moles

.608 moles

.60755 moles

In the equation 2 Al2O3 --> 4 Al + 3 O2, what is the mole ratio of aluminum to oxygen?

10:6

3:4

4:3

2:3

10.

Given the reaction: 4Al + 3O₂ --> 2Al₂O₃
How many moles of Aluminum oxide do you have if you have 2 moles of Al?

3 mole

2 mole

1 mole

0.5 mole

11.

6CO₂+ 6H₂O --> C₆H₁₂O₆ + 6O₂
What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

2.5

12.

4NH₃+ 5O₂-->4NO + 6H₂O
What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

13.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

14.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

15.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C₂H₆). What is the second step in setting up the problem?

16.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

A problem asks how many moles of oxygen gas are needed to react completely with 6 moles of ethane (C₂H₆). What is the final answer for this problem?

13 mol C₂H₆

3 mol O₂

21 mol O₂

42 mol O₂

17.

Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"

1 mol = 22.4 L

1 mol = 39.95 g

1 mol = 6.02x10²³ atoms

More than 1

18.

How many moles are in 22 g of argon?

880 moles

0.55 moles

1.81 moles

5 moles

19.

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

1 mole = 78.12 g

1 mole = 22.4 L

1 mol = 6.02x 10²³ particles

more than one

20.

True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed.

true

false

21.

The left side of the equation below is called

Products

Reactants

22.

The right side of the equation below is called the

products

reactants

23.

A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

Coefficient

reactant

subscript

product

24.

What type of reaction is illustrated below?
FeS + Hal --> H₂S + FeCl

synthesis

decomposition

single replacement

double replacement

25.

Which of the following answers will balance the equation below?
__K + __Br₂ --> __KBr

2, 1, 1

2, 3, 2

2, 1, 2

1, 2, 3

26.

Which of the following options correctly balances the equation below?
__HNO₂+ __O₂ --> __HNO₃

4, 1, 4

1, 2, 1

2, 1, 2

27.

What type of reaction is illustrated below?
2HI --> H₂+ I₂

synthesis

decomposition

single replacement

double replacement

28.

What type of reaction is illustrated below?

Zn + H₂S --> ZnS + H₂

synthesis

decomposition

single replacement

double replacement

29.

Mole Ratios used for conversions are derived from:

the molar mass of the reactants in the balanced chemical equation

the coefficients of the balanced chemical equation

the subscripts of the products in the balanced chemical equation

the group number of each element in the balanced chemical equation

30.

What are the missing coefficients for the unbalanced equation below?

Cr_(s)+ Fe(NO₃)_2(aq) → Fe_(s) + Cr(NO₃)_3(aq)

2,3,3,2

1,3,3,1

2,3,2,3

2,3,1,2

31.

Mg_(s) + HCl_(aq) →MgCl_2(aq) + H_2(g)

The reaction of 2.5 mol of HCl will produce ______ mol of MgCl_2.

2.5

1.25

5.0

1.0

32.

If there are 2 moles of oxygen available, which mole ratio will tells how much water is produced?

C₃H₈ +5O₂ → 3CO₂ + 4H₂O

4 mol H₂O/ 5 mol O₂

5 mol O₂/ 4 mol H₂O

2 mol O₂/ 4 mol H₂O

4 mol O₂/ 2 mol H₂O

33.

If there are 10 moles of propane, C₃H₈, which mole ratio will tells how much oxygen is required for the reaction to take place?

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

1 mol C₃H₈/ 5 mol O₂

5 mol O₂/ 1 mol C₃H₈

5 mol O₂/ 10 mol C₃H₈

10 mol C₃H₈/ 5 mol O₂

34.

Which mole ratio tells how much aluminum oxide is produced from 3 moles of aluminum?

4Al + 3O₂ → 2Al₂O₃

3 mol Al/ 2 mol Al₂O₃

2 mol Al₂O₃/ 4 mol Al

4 mol Al/ 2 mol Al₂O₃

2 mol Al₂O₃/ 3 mol Al

35.

What is the mass of one mole of silver?

32.06 g

107.87 g

14.01 g

22.99 g

36.

48.86 g of cobalt is equal to how many moles of cobalt?

2879 moles

8.291 moles

.8291 moles

.829 moles

37.

How many molecules of water are in a 821.3 g sample?

45.58 molecules

8.232 x 10²⁵ molecules

8.909 x 10²⁷ molecules

2.744 x 10²⁵ molecules

38.

What is the mass of 4.98 x 10²⁴atoms of Zn?

541 g

8.27 g

.122 g

4.59 x 10⁴⁶ g

39.

How many moles of sodium chloride are in a 321.8 g sample?

18810 moles

3.315 x 10²⁴ moles

5.507 moles

4.767 moles

40.

How many formula units of calcium chloride are in a 25.69 g sample?

1.394 x 10²³ F.U.'s

2851 F.U.'s

.2315 F.U.'s

3.845 x 10²⁵ F.U.'s

41.

how many atoms are contained in a 456 g sample of carbon dioxide?

10.34 atoms

6.237 x 10²⁴atoms

1.871 x 10²⁵atoms

2.079 x 10²⁴ atoms

42.

What would be the mass of 9.76 x 10²² formula units of SrCl₂?

.1622 g

25.7 g

20.0 g

.3589 g

43.

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

theoretical yield

mole ratio

actual yield

percentage yield

44.

What is the measured amount of a product obtained from a chemical reaction?

mole ratio

theoretical yield

percentage yield

actual yield

45.

Mole ratios are obtained from the

balanced chemical equation

periodic table

molar mass

46.

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

47.

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

749 g

225 g

479 g

814 g

48.

When does a chemical reaction stop?

When the lab is finished

When the excess reactant is used up

When the limiting reactant is used up

Chemical reactions never stop

49.

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.

Mg + 2HCl --> MgCl₂ + H₂

MgCl2

HCl

50.

9. Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%

actual yield; theoretical yield

theoretical yield; actual yield

51.

11.
LiOH + KCl → LiCl + KOH

b) I actually produced 6 grams of lithium chloride and I began this reaction with 20 grams of lithium hydroxide. What is my percent yield?

16.9%

5.91%

1.88%

12.3%

Reset

Reactions, Mole Ratio, Mole Conversions Version A

Total questions: 51

Worksheet time: 2hrs 10mins

Similar Resources on Wayground