What is the mass in grams of 18.9 mmol of PbO?
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1 point
0.0422 g PbO
4.22 g PbO
4.32 g PbO
42.2 g PbO
The molar mass of PbO (Lead(II) oxide) is 223.2 g/mol.
To convert mmol to grams, multiply by the molar mass:
18.9 mmol x (223.2 g/mol) = 4222.88 g
Therefore, the mass of 18.9 mmol of PbO is 4.22 g PbO.
So the correct answer is 4.22 g PbO.