Doreen Schmidt is a chemist. She needs to prepare 28 ounces of a 11% hydrochloric acid
solution. Find the amount of 14% solution and the amount of 7% solution she should mix to
get this solution
Concentration
Ounces of Solution Ounces of Pure Acid
rate
First Solution
7%
0.07x
Second
1 14% 1 y
Solution
0.14
Mixture Needed
0.11(28)
28
How many ounces of the 14% acid solution should be in the mixture?
ounces

the answers c

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

what's the question?

step-by-step explanation:

there is no question.

answer: your correct answer is b. d.

step-by-step explanation: