CHEM 4.6: Percent Composition
Science
9th - 12th Grade
NGSS covered
Used 10+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Carbon monoxide, a deadly gas, has a chemical formula of CO (one carbon atom with one oxygen atom). If you look at the total atomic mass of CO, does carbon or oxygen make up more of the mass?
carbon
oxygen
they are exactly the same
it is impossible to tell
Tags
NGSS.MS-PS1-1
2.
MATH RESPONSE QUESTION
5 mins • 1 pt
What percentage of carbon monoxide (CO) is carbon? Round your answer to the nearest tenth.
Mathematical Equivalence
ON
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which compound below has a %Cl of 42%?
HClO (molar mass = 52 g/mol)
HClO2 (molar mass mass = 68 g/mol)
HClO3 (molar mass mass = 84 g/mol)
HClO4 (molar mass mass = 100 g/mol)
4.
MATH RESPONSE QUESTION
5 mins • 1 pt
What is the percentage of oxygen in water, H2O? Round your answer to the nearest tenth.
Mathematical Equivalence
ON
Tags
NGSS.MS-PS1-1
5.
MATH RESPONSE QUESTION
5 mins • 1 pt
What is the percent by mass of HYDROGEN in sugar, C12H22O11?
Round your answer to the nearest hundredth.
Mathematical Equivalence
ON
6.
MATH RESPONSE QUESTION
5 mins • 1 pt
What is the percent by mass of OXYGEN in the compound, C10H18O ?
Round your answer to the nearest tenth.
Mathematical Equivalence
ON
Tags
NGSS.HS-PS1-7
7.
MATH RESPONSE QUESTION
5 mins • 1 pt
What percentage of glucose (C6H12O6) is oxygen?
Round your answer to the nearest tenth.
Mathematical Equivalence
ON
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