Question

PLEASE I REALLY NEED ANSWER REAL QUICK

1. 800g of solution of NaCl has 5% of the percent by mass. Find mass of water is required?
a. 780g
b. 760g
c. 740g
d. 720g
e. Other.. and give solution.​

Answer 1

b. 760 g

Step-by-step explanation:

The mass of the solution = 800 g

5% of NaCl by mass of the solution can be determined as follows;

5% of 800 =
`(5)/(100)` × 800

= 5 × 8

= 40 g

The mass of NaCl in the solution is 40 g.

The mass of water = mass of solution - mass of NaCl

= 800 - 40

= 760 g

Therefore, the mass of water required is 760 g.