Please help #5. Number 4 too if you feel the need to help people today. I’m struggling a lot with chemistry

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.