po=1.2 кг/м3 M=0.032 кг/моль Na=6*10^23 n=?
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n=po*Na/M=1.2*6*10^23/0.032=2.25*10^25
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po=1.2 кг/м3 M=0.032 кг/моль Na=6*10^23 n=?
===
n=po*Na/M=1.2*6*10^23/0.032=2.25*10^25
==========================