Given the balanced equation below, calculate the mass of methane (CH4) at STP required to react with 20.0 g of magnesium carbide. Mg2C(s) + 4 H2O(g) --> 2 Mg(OH)2(s) + CH4(g)

In a buffer system of hf and its salt, naf, the f- neutralizes added base the hf is not necessary the hf neutralizes added base the hf neutralizes added acid the f- neutralizes added h2o