2. Find the volume of gas in each problem below. Assume they are gases at STP, a. 4.35 moles of H2
b. 66.5 grams of O2
C. 0.00245 moles of CO2
d. 5.25 x 1026 molecules of CH4
e. 24.5 g of Cl2

Iknow the answer is a but i don't know why

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?