How many grams of H2SO4 are contained in 4.5L of .30 N sulfuric acid?

Technically this question can't be answered because you didn't provide the reaction in which H2SO4 is used. If you are neutralizing BOTH H ions in H2SO4, then grams = mL x N x milliequivalent weight = ??

mew = 0.049 which is molar mass of 98/2000.