4. which of the following is not a pure substance? (1 point)
o milk
o oxygen
o water
o carbon dioxide
mm

What is the pressure of 0.500 moles of carbon dioxide gas in a 2.5 l tank and at a temperature of 301 k? (r=0.0821 l·atm/mol·k) 3.08 atm 1.2 atm 0.23 atm 4.01 atm 4.94 atm