7.4 Hydrogen peroxide decomposes to produce water and oxygen. The equation is:
2H, O2(g) → 2H, O(g) + O2(g)
Using the following values, calculate the heat
change for the reaction and say whether it is
exothermic or endothermic.
Bond energies:
H—H = 436 kJ/mol
00 = 144 kJ/mol
0=0 = 498 kJ/mol
0-H = 464 kJ/mol

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.

Moles = mass/molar mass the molar mass of c20 = 12.011*20 = 240.22 g per mole therefore, the number of moles is 20 g / 240.22 g per mol = 0.0833 moles.