Question

Determine the mass by mass percentage concentration of a 100g salt solution which contains 20g salt.

• A. 30%
• B. 20%
• C. 80%
• D. none of these

Answer 1

Answer: (B)

20%

Solution:- (B) $20\%$

As we know that,

$\text{mass by mass percent}=\frac{\text{Wt. of salt}}{\text{Total wt. of salt}}\times 100$

Given that:-

Weight of salt = 20 g

Total weight of salt = 100 g

$\therefore \text{mass by mass percent}=\frac{20}{100}\times 100=20\%$