God, please help. I don't understand this and it was due 20 minutes ago. Serious answers only.
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Can someone me with these questions plz.

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude