The reaction that takes place in a hydrogen-oxygen fuel cell is 2H2(g)+O2(g)⟶2?

Select the major product of the reaction and determine whether the reaction is exothermic or endothermic.

H2O2 , endothermic

H2O2 , exothermic

H2O , endothermic

H2O , exothermic

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.