Question

Show an equation and a solution for the problem. Arnold needs a 25% solution of nitric acid. He has 20 ml of a 30% solution. How many ml of a 15% solution should he add to obtain the required 25% solution?
A. 20 ml
B. 15 ml
C. 25 ml
D. 10 ml

Answer 1

Let x = amount of 15% solution to add
.30(20)+.15x=.25(20+x)

Answer 2

ty Mertsj

Answer 3

yw

Answer 4

I have more :D

Answer 5

Like what?

Answer 6

I'll ask another question so you can get a medal

Answer 7

ok

Answer 8

What is the answer out of those choices