Methane is just a general word for the substance, while methane ice is frozen methane, in it's solid form. It has to be quite cold for this to happen, it's a gas at normal earth temperatures and pressures.
The number of carbon atoms and therefore size of the molecules (Methane=CH4, Propane=C3H8)
PROPANE IS A BY-PRODUCT OF CRUDE OIL REFINING. METHANE IS A GAS THAT WILL COME FROM ANYTHING THAT WILL...
Methane has a carbon atom, ammonia has none Ammonia has a nitrogen atom, methane has none Methane has a neutral static charge Ammonia has a positive static charge Methane is energetically stable...