WILL MARK YOU THE BRAINLIEST IF YOU ANSWER THESE TWO QUESTION CORRECTLY :)

1. what is the formula of a compound that contains only hydrogen and carbon atoms, its molar mass is 58.12, and the mass percent composition of CARBON is 82.66.

2. what is the formula of a compound that contains only hydrogen and carbon atoms, its molar mass is 44.09, and the mass percent composition of HYDROGEN is 18.29.

1. HYDROCARBONS? 2. ALKANES?

i'm not exactly AMAZING at this but i did some research and this is what i think it is i'm also not in this grade but i tried.

lithosphere and asthenosphere

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.