Suppose that two gases with unequal molar masses were injected into opposite ends of a long tube at the same time and allowed to diffuse toward the centre. They should begin to mix a. in approximately five minutes. b. closer to ...

In the ideal gas law, what is the value that must be calculated from other measurements? a. P b. V c. T d. R

a. –7ºC b. 11ºC c. 15ºC d. 288ºC

A 1.00 L sample of a gas has a mass of 1.92 g at STP. What is the molar mass of the gas? a. 1.92 g/mol b. 19.2 g/mol c. 22.4 g/mol d. 43.0 g/mol  

a. all particles move in the same direction. b. all particles have the same kinetic energy. c. the particles cannot diffuse. d. the particles exert attractive forces on each other.

If gas A has a molar mass greater than that of gas B and samples of each gas at identical temperatures and pressures contain equal numbers of molecules, then a. the volumes of gas A and gas B are equal. b. ...

a. pressure b. density c. mass d. formula

a. measured at constant temperature and pressure. b. that equal 1 L. c. that equal 22.4 L. d. measured at STP.