Calculate the mass of 11.2 liters of oxygen under normal conditions.

Given:
V (O2) = 11.2 l

Find:
m (O2) -?

Solution:
1) n (O2) = V (O2) / Vm = 11.2 / 22.4 = 0.5 mol;
2) m (O2) = n (O2) * M (O2) = 0.5 * 32 = 16 g.

Answer: The mass of O2 is 16 g.



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