Final answer:
To find the mass of 5.02 moles of Pb(NO3)2, multiply the number of moles by the molar mass of Pb(NO3)2. The mass is 1662.64 grams.
Step-by-step explanation:
To calculate the mass of 5.02 moles of Pb(NO3)2 in grams, we will need to know the molar mass of Pb(NO3)2. The molar mass is calculated by summing the atomic masses of all the atoms in a molecule of Pb(NO3)2. This includes one lead (Pb) atom, two nitrogen (N) atoms, and six oxygen (O) atoms.
The atomic masses are approximately: Pb = 207.2 g/mol, N = 14.01 g/mol, and O = 16.00 g/mol. Thus, the molar mass of Pb(NO3)2 is:
(1 × 207.2 g/mol) + (2 × 14.01 g/mol) + (6 × 16.00 g/mol)
This gives us a molar mass of 331.2 g/mol for Pb(NO3)2. Multiplying the molar mass by the number of moles gives us:
5.02 moles × 331.2 g/mol = 1662.64 grams of Pb(NO3)2