How many grams of NaN3 will make 4.0 gal of nitrogen gas

Answer 1

You are missing three things to solve this problem

1). You need the density of N2

2). The balanced chemical equation

3). Conversion for gallons to ml (1 gal = 3785 ml)

For now, I will write the balanced equation and I will let the density of N2 = 0.543 g/ml

Balanced chemical equation:

2 NaN3 ---------> 2 Na + 3 N2

Start with what's given:

4.0 gal N2 x 3785 ml N2/1 gal N2 = 15140 ml N2

Use the density of N2 to get the grams of N2:

0.543 g/ml x 15140 ml = 8221 g N2

Convert grams of N2 to moles of N2:

8221 g N2 x 1mol N2/28 g N2 = 294 mol N2

Mole-to-mole conversion of N2 to NaN3:

294 mole N2 x 2 mol NaN3/3 mol N2 = 196 mol NaN3

Convert moles of NaN3 to grams of NaN3:

196 mol NaN3 x 65 g NaN3/1 mol NaN3 = 12740 grams

Answer 2