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ρ =1.15kg/m³
V=60m³
Vazotu=60*78,1/100=46,86m³
ρ=m/V→m=V*ρ=46,86*1.15=53,889kg
ODP
masa azotu wynosi 53,889kg
pozdrawiam
Hans
Odp: W sali znajduje się 46,86kg azotu.