Finding Percents

What is the percent by mass of Cu in CuBr₂?

• 50%

• 71.6%

• 28.4%

• 44.3%

Tags

NGSS.HS-PS1-7

Find the percent composition of CaCl₂?

• Ca: 36.11%; Cl: 63.88%

• Ca: 53.12%; Cl: 100%

• Ca: 36.11%; Cl: 83.56%

• Ca: 46.11%; Cl: 63.88%

What is the percent composition of Benzene, C₆H₆?

• C = 50%
  H = 50%

• C = 85.7 %
  H = 14.3%

• C = 92.2%
  H = 7.8%

• C = 71.9%
  H = 28.1%

What is the percent by mass of Na in NaCl?

• 39.3%

• 60.7%

• 23.0%

• 76.0%

Find the percent composition of water in a hydrate if the hydrate is 36% water by mass.

• 36%

• 64%

• 50%

• 72%

• 88.8%

• 11.2%

• 33.3%

• 66.7%

• 27.3%

• 72.7%

• 44.0%

• 56.0%

Tags

NGSS.HS-PS1-7

• 25.0%

• 75.0%

• 12.5%

• 87.5%

• 82.4%

• 17.6%

• 14.3%

• 85.7%

• 32.7%

• 67.3%

• 16.3%

• 83.7%