
Stoichiometry and Molar Ratios

Interactive Video
•
Chemistry, Science, Mathematics
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving a stoichiometry problem involving grams of a substance?
Convert grams to moles
Convert grams to molecules
Convert grams to liters
Convert grams to atoms
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you find the molar mass of a compound?
By adding the atomic masses of the elements
By adding the atomic numbers of the elements
By dividing the atomic masses of the elements
By multiplying the atomic masses of the elements
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When converting grams to moles, what information do you need from the periodic table?
Molar mass
Electron configuration
Atomic number
Valence electrons
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a balanced chemical equation, what do the coefficients represent?
The number of grams of each substance
The number of moles of each substance
The number of atoms of each substance
The number of molecules of each substance
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mole ratio of N2 to NH3 in the reaction N2 + 3H2 -> 2NH3?
1:1
1:2
1:3
2:3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molar mass of NH3?
20.04 g/mol
18.02 g/mol
17.04 g/mol
14.01 g/mol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you start with 5.4 moles of N2, how many moles of H2 are required to react completely?
21.6 moles
16.2 moles
10.8 moles
5.4 moles
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