Let the required number be x<span>, that is </span><span>720=x⋅<span>110</span></span><span>, which means that </span><span>x=720</span>×<span>10=7200</span>.
<span>Answer: </span><span>7200</span>
1/3+a=5/4. : a = 11/12 = 0.917.
Answer:
<u>16 ounces</u> 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