Calculate the molecular mass of NaNO3, Na2 CO3 and CaCl2.(Ca = 40u, Cl = 35u, Na = 23u, O = 16u, N = 14u C = 12u)

Sure, let's calculate the molecular mass of each compound:

1. NaNO3: The molecular mass is calculated by adding the atomic masses of each atom in the compound. For NaNO3, we have one sodium atom (Na = 23u), one nitrogen atom (N = 14u), and three oxygen atoms (O = 16u * 3 = 48u). So, the molecular mass of NaNO3 is 23u + 14u + 48u = 85u.

2. Na2CO3: For this compound, we have two sodium atoms (Na = 23u * 2 = 46u), one carbon atom (C = 12u), and three oxygen atoms (O = 16u * 3 = 48u). So, the molecular mass of Na2CO3 is 46u + 12u + 48u = 106u.

3. CaCl2: For this compound, we have one calcium atom (Ca = 40u) and two chlorine atoms (Cl = 35u * 2 = 70u). So, the molecular mass of CaCl2 is 40u + 70u = 110u.