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?

Question

asked Oct 22, 2022 136k views

1 Answer

Russell Vea · Answer 1 · 2022-10-27T11:48:34+0000

Answer:

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.