An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. if

Question

3 years ago

15

An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. if

the flask volume is 1.50 l, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?

Chemistry

1 answer:

OLga [1] · Answer 1 · 2022-08-14T11:13:35+03:00

OLga [1]3 years ago

7 0

Use ideal gas law PV=nRT
at STP, pressure is 1atm and temperature is 273K (0 Celsius)
1×1.5L=n × 0.0821 × 273
n is moles and R is ideal gas law constant, always 0.0821
moles= 14.9422(6.02×10^23 molecules)=9.0×10^24 molecules