Can someone help me please

How does decreasing the gas volume affect the pressure of a gas?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.