How many moles of H2 are contained in a balloon that has a volume of 28.3 cm3 at 25.0oC and a total pressure of 1.001 atm?

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more

Fine out your self ponk

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

13) a 14) a15) b16) i don't know sorry17) a (maybe)