Final answer:
To determine the molecular mass of a compound, you need to calculate the sum of the atomic masses of all the atoms in the compound. This can be done by using the periodic table and multiplying the atomic mass of each element by the number of atoms present in the compound.
Step-by-step explanation:
To determine the molecular mass of a compound, you need to calculate the sum of the atomic masses of all the atoms in the compound. This can be done by using the periodic table and multiplying the atomic mass of each element by the number of atoms present in the compound.
a. CO2: The molecular mass of carbon (C) is 12.01 g/mol, and the molecular mass of oxygen (O) is 16.00 g/mol. So, the molecular mass of CO2 is (12.01 + (16.00 x 2)) g/mol = 44.01 g/mol.
b. NaCl: The molecular mass of sodium (Na) is 22.99 g/mol, and the molecular mass of chlorine (Cl) is 35.45 g/mol. So, the molecular mass of NaCl is (22.99 + 35.45) g/mol = 58.44 g/mol.
c. H2O: The molecular mass of hydrogen (H) is 1.01 g/mol, and the molecular mass of oxygen (O) is 16.00 g/mol. So, the molecular mass of H2O is (1.01 x 2) + 16.00 g/mol = 18.02 g/mol.
d. CaCO3: The molecular mass of calcium (Ca) is 40.08 g/mol, the molecular mass of carbon (C) is 12.01 g/mol, and the molecular mass of oxygen (O) is 16.00 g/mol. So, the molecular mass of CaCO3 is (40.08 + (12.01 x 1) + (16.00 x 3)) g/mol = 100.09 g/mol.