What else is produced during the combustion of propane, c3h8?

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

answer: 45

explanationyou have to add as well to be it could be

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.