I need help I'm doing a comulative exam The Earth is able to sustain life because its atmosphere allows in much of the radiation from the Sun. Please select the best answer from the choices provided T F

its science

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.

What is the reduction potential of a hydrogen electrode that is still at standard pressure, but has ph = 5.65 , relative to the she?