7. What are the coefficients when the equation below is balanced? CH4 + 02 → __CO2 + H2O
A)1,2,1,2
B)1,3,4,1
C)1,2,3,4
D)2, 2, 1, 2

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?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.