How many mol are present in 7.0g of NH3
To determine the number of moles in 7.0g of NH3 (ammonia), we need to use the molar mass of NH3.
The molar mass of NH3 is:
(1 x molar mass of N) + (3 x molar mass of H)
(1 x 14.01 g/mol) + (3 x 1.01 g/mol)
14.01 g/mol + 3.03 g/mol
17.04 g/mol
Now we can calculate the number of moles by dividing the given mass by the molar mass:
7.0 g / 17.04 g/mol
The approximate number of moles is 0.41 mol.