Methane is a combustible gas. How does the number of atoms present before a chemical reaction compare to the number of atoms after the reaction is complete?

d is the correct answer

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.