Lesson: Percent Composition

Percent Composition

Goal

By the end of this lesson. you will be able to calculate the persent composition fo each element in a compound.

​Percent Composition

​Summary:

​Write a summary of how to caclulate the percent composition of an element in a compound.

Multiple Choice

What is thpercent composition of each element in Sodium Hydroxide, NaOH?

• Sodium: 50.00%, Oxygen: 30.00%, Hydrogen: 20.00%
• Sodium: 60.00%, Oxygen: 35.00%, Hydrogen: 5.00%
• Sodium: 45.00%, Oxygen: 45.00%, Hydrogen: 10.00%
• Sodium: 57.48%, Oxygen: 40.00%, Hydrogen: 2.52%.

Multiple Choice

What is the percent composition of each element in C₆H₁₂O₆?

• C: 40.00%, H: 6.71%, O: 53.29%
• C: 30.00%, H: 10.00%, O: 60.00%
• C: 50.00%, H: 5.00%, O: 45.00%
• C: 25.00%, H: 15.00%, O: 60.00%

Multiple Choice

What percentage of the total atomic mass of magnesium bromide (MgBr₂) is composed of magnesium?

• 13%

• 43%

• 63%

• 87%

Multiple Choice

What is the percent composition of the elements in Benzene, C₆H₆?

• C = 50%

  H = 50%

• C = 85.7 %

  H = 14.3%

• C = 92.2%

  H = 7.8%

• C = 71.9%

  H = 28.1%

Multiple Choice

Find the percentage composition of Mg in Mg₃(PO₄)₂.

• 27.48% Mg

• 43.11% Mg

• 16.00% Mg

• 12.63% Mg