Option 1 states that there are 12 x 10^24 atoms of H2. To determine the mass of this option, we need to consider the molar mass of H2, which is 2 grams per mole. Since H2 has a molar mass of 2 grams, 12 x 10^24 atoms of H2 would have a mass of 12 x 10^24 / Avogadro`s number (6.02 x 10^23) grams, which is approximately 20 grams.

Option 2 states that there is 20 grams of S, so the mass in this option is simply 20 grams.

Option 3 states that there are 2 grams equivalents of Na2CO3. The term "gram equivalents" refers to the amount of a substance that contains one mole of equivalents, which is equal to the number of moles multiplied by the number of equivalents per mole. Without knowing the number of equivalents of Na2CO3, we cannot accurately determine the mass in this option.

Option 4 states that there are 4 moles of CO2. The molar mass of CO2 is 44 grams per mole, so the mass in this option is 4 moles x 44 grams/m