Answer:
a) The molecular mass of each compound dinitrogen pentaoxide is 108 g/mol.
b) The molecular mass of each compound lead(ll) nitrat is 331 g/mol.
c) The molecular mass of each compound calcium peroxide is 72 g/mol.
Explanation:
a) Molecular mass of dinitrogen pentaoxide that
be M.
Mass of nitrogen atom = 14 g/mol
Mass of oxygen atom = 16 g/mol
![M=2\times 14 g/mol+5\times 16 g/mol=108 g/mol](https://tex.z-dn.net/?f=M%3D2%5Ctimes%2014%20g%2Fmol%2B5%5Ctimes%2016%20g%2Fmol%3D108%20g%2Fmol)
b) Molecular mass of lead(ll) nitrate that
be M.
Mass of lead = 207 g/mol
Mass of nitrogen atom = 14 g/mol
Mass of oxygen atom = 16 g/mol
![M=1\times 207 g/mol+1\times 2\times 14 g/mol+3\times 2\times 16 g/mol=331 g/mol](https://tex.z-dn.net/?f=M%3D1%5Ctimes%20207%20g%2Fmol%2B1%5Ctimes%202%5Ctimes%2014%20g%2Fmol%2B3%5Ctimes%202%5Ctimes%2016%20g%2Fmol%3D331%20g%2Fmol)
c)Molecular mass of calcium peroxide that
be M.
Mass of calcium atom = 40 g/mol
Mass of oxygen atom = 16 g/mol
![M=1\times 40 g/mol+2\times 16 g/mol=72 g/mol](https://tex.z-dn.net/?f=M%3D1%5Ctimes%2040%20g%2Fmol%2B2%5Ctimes%2016%20g%2Fmol%3D72%20g%2Fmol)