Calculate the mass, in grams, of 2.95 mol of argon, Ar. mass of Ar:
Calculate the mass, in grams, of 0.627 mol of nitrogen dioxide, NOZ.
mass of NO2:

118 g of Ar; 28.8 g of

Explanation:

To convert from moles to grams, you simply multiply by the atomic mass. So the conversion table looks as follows:

The mol units cancel, and you are left with 118 g of Argon (117.8525 without sig-figs).

As for the next part of our problem, the first thing we need to do is find the molar mass of . e can do this by adding the weight of all the atoms within the compound:

N + 2(O) = (14.01) + 2(16) = 46.01 g

Then, we repeat the above process, except we use the molar mass we just found instead of the atomic weight:

Once again, the mol units cancel, and we are left with 28.8 g of (28.84827 before sig-figs).

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