Question

A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound

Answer 1

For Edmentum/Plato users, the correct answer is B. 19.44%

Answer 2

♥ Gather information we know:
Total Mass:
`14.5+3.5`
Solve:

`=18g`
Gather more information and solve:
Percent of Oxygen:
`(3.5)/(18)`
`* 100`


Final answer: 19.44%