Achemist currently has a solution of 30% hydrochloric acid and a solution of 15% hydrochloric acid. he mixes the two solutions together to create 24 oz of a 25% hydrochloric acid solution. how many ounces of the 30% hydrochloric acid solution did he use in order to obtain the 25% solution

16 ounces of the 30% hydrochloric acid solution is used in order to obtain the 25% solution.

Step-by-step explanation:

Let amount of 30% ounces be 'x' and that of 15% ounces by 'y'.

Given:

Total amount on mixing both the solution = 24 oz

∴

Also, the total acid content in the resulting 25% solution is equal to the sum of the acid contents in 30% and 15% solutions.

∴

Now, plug in 'x' from equation (1) into equation (2). This gives,

ounces

Therefore, ounces

Hence, 16 ounces of the 30% hydrochloric acid solution is used in order to obtain the 25% solution

a. the are of the rectangle is 18.25

b. 18.25 times two is 36.50

rae me : d