Question

mixture of liquid and B contains 70% of b by volume liquid of c us added till the finnal solution contains 12% by volume of A . what is the ratio of B to C in final mixture​

Answer 1

Answer:

7 : 15

Step-by-step explanation:

Mixture Contains  70% of B  by Voilume

Let say Mixture = M

Then B = (70/100)M = 0.7M

& A = M - 0.7M = 0.3M

Let Say C is added = C

Then Final mixture = M + C

A is 12 %

=>  (0.3M/(M + C)  * 100 = 12

=> 0.3M = 0.12M + 0.12C

=> 0.18M = 0.12C

=> C = 1.5M

Final Mixture = M + 1.5M = 2.5M

A = 0.3M

B = 0.7M

C = 1.5M

the ratio of B to C in final mixture​  0.7M : 1.5M

=> 7 : 15