Calculate the molar masses for NH₃ and SF₆. How many grams of NH₃ are needed to provide the same number of molecules as in 0.184 g of SF₆?
a) NH₃: 17 g/mol, SF₆: 146 g/mol; 0.105 g
b) NH₃: 34 g/mol, SF₆: 146 g/mol; 0.210 g
c) NH₃: 17 g/mol, SF₆: 146 g/mol; 0.210 g
d) NH₃: 34 g/mol, SF₆: 69 g/mol; 0.105 g