Answer:
D. 9
Step-by-step explanation:
9 is odd, however it is a composite number. That is the opposite of what the conditional is saying.
It is (18,9) b/c 8-(-10) would be -18 and 0-9 would be -9 but you have to get the absolute value of it so it is (18,9)
Answer:
4%
Step-by-step explanation:
A 20% solution with a total volume of 400 mL has 20% * 400 mL of solute.
20% * 400 mL = 80 mL
When you dilute the solution to 2 L, you introduce additional water, but no additional solute, so now you have the same 80 mL of solute in 2 L of total solution.
The concentration is:
(80 mL)/(2 L) = (80 mL)/(2000 mL) = 0.04
As a percent it is:
0.04 * 100% = 4%
It’s C because if you look at the problem and solve it the right way it’ll be 10.50
