Understanding Percent Composition in Chemistry

What is the mass of chlorine in the compound lithium chloride (LiCl)?

• 6.941 g

• 35.453 g

• 42.394 g

• 17 g

Tags

NGSS.HS-PS1-7

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%

Tags

NGSS.HS-PS1-7

What is the total mass of the compound lithium chloride (LiCl)?

• 6.941 g

• 35.453 g

• 42.394 g

• 1

Tags

NGSS.HS-PS1-7

• 27.29%

• 72.71%

• 44.01%

• 12.01%

• 11.19%

• 88.81%

• 5.59%

• 18.02%

• 98.08 g/mol

• 100.10 g/mol

• 96.07 g/mol

• 102.14 g/mol

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

• 82.24%

• 17.76%

• 14.01%

• 28.02%

If the molar mass of a compound is 180 g/mol and it contains 40% carbon by mass, what is the mass of carbon in one mole of the compound?

• 72 g

• 60 g

• 45 g

• 36 g

What is the molar mass of Mg₂P₂?

• 110.54 g/mol

• 55.28 g/mol

• 141.53 g/mol

• 134.87 g/mol