Question

Determine the volume in liters occupied by 14.0g of nitrogen gas at STP?

Answer 1

Mol = mass/ molar mass

So look up the molar mass of nitrogen on your periodic table, which is 14

But REMEMBER it's asking for nitrogen gas which is N2

So, molar mass= 2*14= 28 g/mol

mol= (14g)/ (28 g/mol)= 0.5 mol

So now you got your number of moles

at STP mol= volume/ 22.4 dm^3

so (0.5)(22.4)= 11.2 dm^3 which is 11.2 L

yo, just memorize them mole formulas and you'll be good fam-- just make sure to pay attention to STP or SATP, and if they're asking for "gas" or just the atom!