
Percent Composition and Molecular Structure
Interactive Video
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Chemistry
•
9th - 10th Grade
•
Practice Problem
•
Medium
Liam Anderson
Used 2+ times
FREE Resource
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of finding the percent composition by mass in a compound?
To determine the number of atoms in a molecule
To find the percentage of each element in a compound
To measure the volume of a compound
To calculate the density of a compound
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molar mass of C2H2?
24.06 grams per mole
26.04 grams per mole
28.02 grams per mole
30.00 grams per mole
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many carbon atoms are present in C2H2?
Four
One
Two
Three
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent composition by mass of carbon in C2H2?
92.24%
90.00%
95.00%
85.00%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the atomic mass of hydrogen used in the calculation?
1.02 grams per mole
1.03 grams per mole
1.01 grams per mole
1.00 grams per mole
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many hydrogen atoms are present in C2H2?
Four
Two
One
Three
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent composition by mass of hydrogen in C2H2?
8.76%
7.76%
5.76%
6.76%
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