Question

Large amounts of an unknown compound were isolated from seawater. The compound contained 32.0 grams ofbromine and 4.9 grams of magnesium. What is its percent composition?

Answer 1

87% bromine and 13% magnesium

Step-by-step explanation:

The compound contained 32.0 grams of bromine and 4.9 grams of magnesium.

We need to find its percent composition.

Mass of the sample = mass of bromine + mass of magnesium

= 32 g + 4.9 g

= 36.9 g

Percentage composition of bromine,

`\%=(32)/(36.9)* 100\\\\=86.7\\\\=87\%`

The percentage composition of magnesium,

`\%=(4.9)/(36.9)* 100\\\\=13.27\\\\=13\%`

So, its percent composition is 87% bromine and 13% magnesium.