Question

An empty water bottle is full of air at 15°C and standard pressure. The volume of the bottle is 0.500 liter. How many moles of air are in the bottle?

Answer 1

Answer: the water bottle contains 0.0211 mole of air

Step-by-step explanation:

Answer 2

Answer: 0.02 moles

Explanation: Using ideal gas equation:

`PV=nRT`

`n=(PV)/(RT)`

P = pressure = standard pressure= 1 atm

V = volume = 0.500L

n = no of moles = ?

R = gas constant =0.0821 Latm\molK

T= temperature =
`15^0C` = (15+273)K= 288K

`n=(1* 0.500)/(0.0821* 288)=0.02moles`