Answer to Question #276731 in General Chemistry for roro chuchu

Question

3.Calculate the volumeoccupied by 5.0 moles of nitrogen gas (N2) at 28°C and 2.05 atm in a disinfectant

aerosol spray.

2. Calculate the number of moles of oxygen(O2) in a 35.0 L ventilator cylinder at STP.

Answer 1

$1)\\P=2.05atm$

$V=$

$n=5moles$

$R=0.0821. \frac{atmL}{molK}$

$T=(28+273)K=301K$

$PV=nRT\implies\>V=\frac{nRT}{P}$

$V=\frac{5×0.0821×301}{2.05}$

$=60.27L$

$2)\\\>P=1atm\\V=35L\\n=\\R=0.0821\>\frac{atmL}{molK}$

$T=273$

$PV=nRT\implies\>n=\frac{PV}{RT}$

$n=\frac{1×35}{0.0821×273}\\\\=1.5616moles$