given the following equation: CH4 + 2O2 -> CO2 + 2H2O How many grams of CH4 are needed to react with 3.2 grams of O2

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.