For i: 33mL
For ii: 87-88mL
For iii:22.3mL
For which of the following activities might you want to hire a chemist?
Answer: D. testing a rock sample for gold content
Which of the following procedures involves a physical change in one of the substances?
Answer: C. separating a salt solution by evaporating the water
I just took that quiz , it’s A
The answer is B because isotopes have the same number of protons and neutrons.