Percent Mass

What would the percent by mass be of Oxygen in a compound that has a formula of C₁₀H₁₈O ?

• 154.0

• 77.9

• 10.4

• 11.7

What is the percent by mass of Cu in CuBr₂?

• 50%

• 71.6%

• 28.4%

• 44.3%

What is the percent by mass of Br in CuBr₂?

• 50%

• 71.6%

• 28.4%

• 44.3%

Tags

NGSS.HS-PS1-7

What is the percent by mass of Na in NaOH?

• 40%

• 2.5%

• 22.9%

• 57.5%

What is the percent by mass of H in NaOH?

• 40%

• 2.5%

• 22.9%

• 57.5%

Tags

NGSS.HS-PS1-7

What is the percent by mass of O in NaOH?

• 40%

• 2.5%

• 22.9%

• 57.5%

What is the percent by mass of H in (NH₄)₃PO₄?

• 1%

• 8%

• 12%

• 21%

What is the percent by mass of N in (NH₄)₃PO₄?

• 28%

• 8%

• 12%

• 21%

Tags

NGSS.HS-PS1-7

What is the percent by mass of O in (NH₄)₃PO₄?

• 8%

• 43%

• 12%

• 21%

What is the percent by mass of oxygen in MgO? Hint: The attached image is an example of a worked problem other than this one.

• 20%

• 40%

• 50%

• 60%