Question 1

What coefficient should be used to make the following equation balanced?
N2+O2--> _NO

Accepted Answer

2

Answer

3

Answer

1

Answer

4

Question 2

Mole ratios are obtained from the

Accepted Answer

balanced chemical equation

Answer

periodic table

Answer

molar mass

Question 3

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

Accepted Answer

2 moles NH3 / 1 moles N2

Answer

1 moles NH3 / 2 moles N2

Answer

1 moles N2 / 3 moles NH3

Question 4

For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

Accepted Answer

3mol Mg / 2 mol Fe

Answer

2 mol Mg/ 3 mol Fe

Answer

3 mol MgO / 2 mol Fe

Question 5

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

Accepted Answer

Write a Balanced Equation

Answer

Write the mass given

Answer

Write the moles given

Question 6

2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?

Accepted Answer

8 moles

Answer

2 moles

Answer

4 moles

Answer

16 moles

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