Question

Pls hurry!!
If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in solution?
8.0 g
50 g
80 g
800 g

Answer 1

Percent Mass of solute is 4% ==> 4g of solute is present in 100g of the solution. 

given mass of solution is 200g therefore mass of solute 
= 4% of 200g 
= 8g 
therefore mass of solute = 8g 

Answer 2

Answer : The correct option is, (a) 8.0 g

Solution : Given,

Percent of solute = 4 %

Mass of solution = 200 g

Mass by mass percent (m/m)% : It is defined as the mass of solute present in the mass of solution.

Formula used :

$(m/m)\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

Now put all the given values in this formula, we get the mass of solute.

$4\%=\frac{\text{Mass of solute}}{200g}\times 100$

$\text{Mass of solute}=8.0g$

Therefore, the mass of solute in solution is, 8.0 g