Question

What is the percent by mass of water in Na2SOa 10H20?total mass of element in compoundUse%Elementx 100molar mass of compoundO 5.59%O 11.26%44.08%O 55.92%

Answer 1

The answer is D.55.92%

Step-by-step explanation:

Answer 2

Molar mass Na₂SO₄. 10H₂O = 322.19 g/mol

Molar mass H₂O = 18.0

% Element = molar mass / total mass x 100

% Element = 18 / 322,19 x 100

% Element = 5.59 %

Answer A

hope this helps!