p2=5p1
p1V=n1RT1; V=n1RT1/p1 ;n=m1/M1=5*10^-3/4*10^-3=1.25 моль
p2V=n2RT2; V=n2RT2/p2; n2=m2/28*10^-3
n1RT1/p1=n2RT2/5p1
1.25*673=m2*323/28*10^-3*5
m2=28*10^-3*5*1.25*673/323=0.36 кг
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p2=5p1
p1V=n1RT1; V=n1RT1/p1 ;n=m1/M1=5*10^-3/4*10^-3=1.25 моль
p2V=n2RT2; V=n2RT2/p2; n2=m2/28*10^-3
n1RT1/p1=n2RT2/5p1
1.25*673=m2*323/28*10^-3*5
m2=28*10^-3*5*1.25*673/323=0.36 кг