Free Printable Stoichiometry Practice

Worksheets

Stoichiometry Practice

Total questions: 25

Worksheet time: 2hrs 12mins

Name

Class

Date

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

256 g of O₂

576 g of O₂

288 g O₂

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

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
About how many grams of H₂O will be produced from 150 grams of Fe₂O₃?

50 grams H₂O

60 grams H₂O

5000 grams H₂O

6000 grams H₂O

Given the following reaction, 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

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

How do I move from grams to moles

multiply by molar mass

divide by molar mass

multiply by Avo number

divided by Avo number

Use the following equation:
2NaOH(aq) + H₂SO₄(aq) --> 2H₂O(l) + Na₂SO₄(aq)
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide?

150.22 g Na₂SO₄

593.44 g Na₂SO₄

330.04 g Na₂SO₄

297.65 g Na₂SO₄

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

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

10.

151 grams of Al₂O₃ are produced. How many grams of Al was needed in the reaction? Al + O₂ -------> Al₂O₃ balance first.

79.91 g

22.4 liters

57.8 g

142.8 g

11.

What Mass of sulfur must burn to produce 3.42 L of SO₂ @ 273K and 101 kPa?

Use the following Equation : S + O₂ --> SO₂

2.45 g S

5.00 g S

4.88 g S

12.

Use the following equation:
2NaOH(aq) + H₂SO₄(aq) --> 2H₂O(l) + Na₂SO₄(aq)
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide?

150.22 g Na₂SO₄

593.44 g Na₂SO₄

330.04 g Na₂SO₄

297.65 g Na₂SO₄

13.

How many molecules are there in 122 g of NO2

1.60 X 10^24 Molecules

1.0 X 10^24 molecules

1.6 X 10^25 Molecules

2.0X 10^24 molecules

14.

How many molecules are there in 237 g of CCl4?

9.8 X 10^23 molecules

10. X 10^23 molecules

9.0 X 10^23 molecules

9.8 X 10^24 molecules

15.

How many moles are there in 24.0 grams of FeF3?

.213 moles

.4 moles

.3 moles

.2 moles

16.

When you are solving for molecules, atoms, and particles you always use what number?

6.02 X 10²³

Lucky 7

Guess

17.

If you have moles on top, what do you need on the bottom of the conversion factor to be?

atoms

particles

grams

moles

18.

If you have grams on top, what do you need on the bottom of the conversion factor to be?

atoms

particles

grams

moles

19.

If you have particles on top, what do you need on the bottom of the conversion factor to be?

atoms

particles

grams

moles

20.

If you have moles on top, what do you need on the bottom of the conversion factor to be?

atoms

particles

grams

moles

21.

How many molecules are in 27.5 grams of NaOH

41.4 molecules

4.14 x 10²³ molecules

4.14 x 10²⁵molecules

1.83 x 10^-21molecules

22.

How many moles are in 2.85 x 10¹⁸atoms of iron, Fe?

41.4 molecules

4.14 x 10²³ molecules

4.14 x 10²⁵molecules

1.83 x 10^-21molecules

23.

How many moles are in 3.01 x 10²²atoms of magnesium, Mg?

0.05 moles

1.81 X 10⁴⁶ moles

5.00 x 10²¹moles

5 moles

24.

How many atoms are in 6.5 moles of zinc, Zn?

4.2 atoms

3.91 X 10^-24 atoms

3.91 x 10²⁴atoms

5 x 10²⁴ atoms

25.

When you are solving for molecules, atoms, and particles you always use what number?

6.02 X 10²³

Lucky 7

Guess

100 %

Stoichiometry Practice

Total questions: 25

Worksheet time: 2hrs 12mins

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