CHEM 4.6: Percent Composition

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

What percentage of carbon monoxide (CO) is carbon? Round your answer to the nearest tenth.

Mathematical Equivalence

ON

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)

What is the percentage of oxygen in water, H₂O? Round your answer to the nearest tenth.

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

What is the percent by mass of HYDROGEN in sugar, C₁₂H₂₂O₁₁?

Round your answer to the nearest hundredth.

Mathematical Equivalence

ON

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

What percentage of glucose (C₆H₁₂O₆) is oxygen?

Round your answer to the nearest tenth.

Mathematical Equivalence

ON

What percentage of glucose (C₆H₁₂O₆) is carbon? Round your answer to the nearest tenth.

Mathematical Equivalence

ON

What is the percentage of potassium in KMnO₄? Round your answer to the nearest tenth.

Mathematical Equivalence

ON

What is the percentage of oxygen in Al(OH)₃? Round your answer to the nearest tenth.

Mathematical Equivalence

ON