# Chemistry Dr. Bob

Balanced Equation:
2PbS+ O2 --> 2PbO +2SO2

How many grams of oxygen are required to react with 0.124mole lead(II) sulfide?

Ummmm.. I tried to convert it to grams?
0.124 mol * molar mass of PbS (239.3) = 29.67 g of PbS then tried to plug it into the equation..
1/2 * 29.67/239.3 *32 = 1.98 g?? but that's wrong?? Help please?

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1. You don't convert anything to grams. Use mols to convert from what you have to what you want. Then convert to grams. Reactions go by mols, not grams.

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