Question 1
Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg(
s) + O
2(
g) → 2MgO(
s)
How many moles of O
2 are consumed when 0.850 mol of magnesium burns?
◦ 1.70
◦ 0.425
◦ 0.0350
◦ 0.850
◦ 0.559
Question 2
Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:
2NaN
3(
s) → 2Na(
s) + 3N
2(
g)
How many grams of sodium azide are required to produce 37.0 g of nitrogen?
◦ 0.881
◦ 85.9
◦ 1.98
◦ 129
◦ 57.2