How many grams of nh3 are needed to provide the same number of molecules as in 0.35 g of sf6 ?

Explanation:

Using the molar mass of the chemical formula SF₆ you can find the number of moles of molecules in 0.35 g of such substance. Then, using the molar mass of NH₃, you can find mass in grams corresponding to the same number of molecules.

1. Find the molar mass of SF₆:

Atom   atomic mass          number of atoms   total mass in 1 mole

S           32.065 g/mol                     1                                       32.065 g

F            18.998 g/mol                     6                 6 × 18.998 = 113.988 g

                                                          molar mass of SF₆ =    146.053 g/mol

2. Find the number of moles in 0.35 g of SF₆:

3. Find the molar mass of NH₃:

Atom   atomic mass          number of atoms   total mass 1 mole                

N           14.007 g/mol                     1                                       14.007 g

H             1.008 g/mol                    3               3 × 1.008 g = 113.988 g

                                                         molar mass of NH₃ =    17.031 g/mol

4. Find the mass in 0.0024 mol of NH₃:

5. Conclusion:

There are 0.041 g of NH₃ in the same number of molecules as in 0.35 g of SF₆.