• The molar mass of a compound is equal to the sum of the molar masses of the atoms in the molecules or ions in the compound. Example: molar mass of water (H2O) MH2O = 2(MH) + (MO) = 2(1.01g/mol) + 1(16.0 g/mol) =18.02 g/molQ1 a) Find the molar mass of H2CO2b) Calculate the molar mass of magnesium if 0.330mol has a mass of 8.02gc) Calculate the mass, in grams, of 2.00 mol of calcium atoms. d) How many atoms of gold are in a 232.8g of pure gold?e) How many atoms of oxygen are in a 230.0g of oxygen gas?
• The molar mass of a compound is equal to the sum of the molar masses of the atoms in the molecules or ions in the compound.
Example: molar mass of water (H2O)
MH2O = 2(MH) + (MO)
= 2(1.01g/mol) + 1(16.0 g/mol)
=18.02 g/mol
Q1
a) Find the molar mass of H2CO2
b) Calculate the molar mass of magnesium if 0.330mol has a mass of 8.02g
c) Calculate the mass, in grams, of 2.00 mol of calcium atoms.
d) How many atoms of gold are in a 232.8g of pure gold?
e) How many atoms of oxygen are in a 230.0g of oxygen gas?
• The molar mass of a compound is equal to the sum of the molar masses of the atoms in the molecules or ions in the comp
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