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Stoichiometry Review

Authored by Rebecca Younger

Chemistry

10th Grade

Used 3+ times

Stoichiometry Review
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19 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

___KNO3 → ___KNO2 + ___O2

What coefficients are needed to balance the reaction?

2, 2, 1

2, 3, 2

1, 2, 2

1, 3, 1

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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

10:6

3:4

4:3

2:3

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Mole ratios are obtained from the

balanced chemical equation
periodic table
molar mass

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a Limiting Reactant?

the amount you end with

the chemical you run out of first

the unreacted chemical you have left over

the amount you start with

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