Mastering Stoichiometry Concepts
Authored by NOOR FARAHIN BAIN
Chemistry
University
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the number of particles in one mole of a substance?
6.022 x 10^23
1.00 x 10^24
3.14 x 10^22
6.022 x 10^22
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you convert grams of a substance to moles?
moles = grams / molar mass
moles = grams + molar mass
moles = grams - molar mass
moles = grams * molar mass
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Balance the following equation: C3H8 + O2 → CO2 + H2O.
C3H8 + 3 O2 → 2 CO2 + 3 H2O
C3H8 + 5 O2 → 3 CO2 + 4 H2O
C3H8 + 4 O2 → 2 CO2 + 5 H2O
C3H8 + 6 O2 → 4 CO2 + 2 H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the limiting reactant in the reaction: 2H2 + O2 → 2H2O if you have 3 moles of H2 and 1 mole of O2?
H2O
O2
2H2
H2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the number of moles in 50 grams of NaCl.
1.2 moles
0.855 moles
0.5 moles
0.75 moles
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If 4 moles of A react with 3 moles of B, how many moles of C are produced in the reaction A + 2B → C?
2 moles of C
1.5 moles of C
4 moles of C
3 moles of C
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent yield if 10 grams of product were obtained from a theoretical yield of 15 grams?
66.67%
80%
75%
50%
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