How many N atoms are in 2.05× 10^{22} N_{2}O molecules?
Each molecule of N_{2}O contains 2 atoms of nitrogen.
10 molecules of N_{2}O contain 20 atoms of nitrogen.
100 molecules of N_{2}O contain 200 atoms of nitrogen.
1000 molecules of N_{2}O contain 2000 atoms of nitrogen.
2.05 × 10^{22} molecules of N_{2}O contain how many atoms of nitrogen?