In this item, we are going to use the concepts of total mass balance and component mass balance. We let the amount of the pure acid be equal to x.
Total mass balance:
7 + x = 7 + x
Hence, the total amount of the resulting solution is 7 + x
Component mass balance,
(1)(x) + (0.4)(7) = (0.7)(7 + x)
The value of x from the component mass balance is equal to 7.
<em>Answer: 7 gallons</em>
K is less than -10, you would divide by -9 on each side and when you divide by a negative then you turn the sign around.
Answer:
$72
Step-by-step explanation:
First yard:
weeded and mowed
12 + 20 = 32
Second yard:
mowed and edged
20+ 15 = 35
Then he got a tip of 5
Total
32+35+ 5
72
Answer: 1.5
Step-by-step explanation: To find 5% of 30, first write 5% as a decimal by moving the decimal point 2 places to the right to get <em>.</em>05.
Next, the word "of" means multiply, so we have (.05)(30) which is 1<em>.</em>5.
So 5% of 30 is 1<em>.</em>5.
The answer is A. The square root of 100 is ten because ten times ten is 100.