
Stoichiometry Molecules and Liters
Authored by Charles Martinez
Chemistry
9th Grade - University
NGSS covered

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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Molar masses are determined from
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Stoichiometry is based on the law of conservation of
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2H2 (_____) + O2 (_____)→ 2H2O (_____)
How many moles of water can be produced if 8 moles H2 are used?
4 moles
8 moles
16 moles
2 moles
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
N2 (_____) + 3H2 (_____)→ 2NH3 (_____)
How many moles of hydrogen are needed to react with 5 moles of nitrogen?
6
2
3
15
Tags
NGSS.HS-PS1-7
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
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
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
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
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
C3H8 (_____) + 5 O2 (_____)→ 3 CO2 (_____) + 4 H2O (_____)
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed?
0-5
6-10
10-15
>15
Tags
NGSS.HS-PS1-7
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