This is due tonight and I need help. (Please don’t delete answers or spam. Thank you! )

I’ll mark brainliest :)

What is the percent by volume (v/v) of a solution with 1.08 mL of formaldehyde
dissolved in 198.92 mL of water?

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

What happens when the temperature of a solution increases?