Find the mass {in g} of 2.0L of nitrogen at STP?

Question

Process and answer needed!

Answer 1

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1. Step 1. Rearrange PV = nRT for n

n = PV/RT



1. Step 2. Plug it in

STP: P = 1 atm; T = 273.15 K

moles of N₂= (1 atm * 2.0 L)/(0.08206 L*atm/mol*K *273.15 K) = 0.0892 mol of N₂

1. Step 3. Convert moles to mass

mass of N₂ = 0.0892 mol of N₂* 28.02 g/mol = 2.5 g of N₂

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