Free Printable Stoichiometry without limiting reagents

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Stoichiometry without limiting reagents

Total questions: 35

Worksheet time: 3hrs 56mins

Name

Class

Date

Mole ratios are obtained from the

balanced chemical equation

periodic table

molar mass

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation? P₄O₁₀ + 6 H₂O --> 4 H₃PO₄

6:4

4:6

1:3

3:1

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 6 moles H₂?

4 moles Fe

6 moles Fe

9 moles Fe

2 moles Fe

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

6.7 mol

1.0 mol

10.1 mol

4.5 mol

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

13.7 mol

2.75 mol

6.11 mol

6.85 mol

What is the first thing you must do to solve a stoichiometry problem?

Write a Balanced Equation

Panic

Write an Unbalanced Equation

Ask for help

True or False. You must use the mole ratio from a balanced equation to do stoichiometry.

True

False

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

256 g of O₂

576 g of O₂

288 g O₂

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

256 g of O₂

576 g of O₂

288 g O₂

10.

If you start with atoms of NaOH and are going to moles of NaOH, how many steps is it?

11.

How many molecules are in 1 mole of CO₂?

4.6 molecules

4.6 grams

6.02 x 10 ²³ molecules

1.806x 10 ²⁴ atoms

12.

What is stoichiometry?

The study of how the quantities of reactants and products are related in chemical reactions

The study of the speed of reactions

The study of how chemical reactions occur

The study of types of reactions

13.

What is the molar mass of C₆H₁₂O₆?

150.0

160.0

170.0

180.0

14.

N₂ + 3H₂ → 2NH₃
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

15.

Balance the following reaction :

CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

1,2,2,2

1,2,1,1

2,1,1,1

2,1,2,1

16.

How many steps will it take me to go from grams to grams?

17.

I use molar mass to convert to moles when the problem gives me grams?

False

True

18.

I use 6.02 x 10²³ molecules in one mole to convert to moles when the problem gives me molecules?

True

False

19.

How many particles are in 13.5 grams of Beryllium?

1.5 particles

9 particles

4x10²³ particles

9x10²³ particles

20.

What does the Greek word "Stoichio" mean in English?

Element

Compound

Mixture

Solution

21.

Unit of chemistry that deals with the quantitative measurements between reactants and products that can be determined using balanced chemical equations.

atomic theory

nomenclature

balancing equations

stoichiometry

22.

Metry means

Measure

Meter

Millimeter

Meater

23.

How many molecules are in 1 mole of CO₂?

4.6 molecules

4.6 grams

6.02 x 10 ²³ molecules

1.806x 10 ²⁴ atoms

24.

N₂ + 3H₂ → 2NH₃
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

1 mol NH₃ / 2 mol N₂

1 mol N₂ /2 mol NH₃

2 mol N₂ /3 mol NH₃

1 mol N₂ / 3 mol NH₃

25.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

124 g O₂

26.

How many grams are in 7.8 moles of NaCl?

476grams

450 grams

456 grams

462 grams

27.

Cl₂ + 2KBr → Br₂ + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

749 g

223 g

479 g

814 g

28.

Name the following compound: SnO₂

tin (II) oxide

tin (IV) oxide

tin (II) oxygen

tin oxide

29.

SiO₂ + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?

_{96 g}

0.67 g

2.67 g

48 g

30.

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

5.2 g

2.6 g

690 g

45 g

31.

How many water molecules are in 5.2 moles of water?

6.02 x 10²³

5.2

3.1304 x 10²⁴

8.638 x 10^-24

32.

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

33.

What does the mole ratio of a balanced equation allow us to do?

tell the amount of product produced from a specific amount of reactant

tell the amount of reactant needed to make a certain amount of product

tell the amount of reactant needed to react with a specific amount of reactant to make the product

all of the previous answers are true

34.

If I have 2.0L of a gas at STP, what conversion factor would I need to use to convert this volume to mols of gas?

1 mol = 22.4 L

1 L = 22.4 mol

1 L = 1,000 ml

1,000 L = 1 Kl

35.

How many liters of carbon dioxide gas are formed by the combustion of 300.63 grams of liquid heptane (C₇H₁₆)?

471.39 liter

67.341 liters

925.94 liters

382.6 liters

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Stoichiometry without limiting reagents

Total questions: 35

Worksheet time: 3hrs 56mins

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