The four flasks below are of the same size and temperature but different in pressure. Which one contains the greatest number of molecules? 1 atm 2 atm 3 atm 4 atm Flask 1 Flask 2 Flask 3 Flask 4 Flask 1 Flask 2 Flask 3 Flask 4

What is the volume occupied by 1.40 moles of He gas at standard pressure and temperature? 44.8 L 11.2 L 5.60 L 22.4 L 31.4 L

Equal moles of three different ideal gases (A, B, and C) are prepared in separate sealed chambers at different temperatures. The velocity distributions for molecules of the three gases are shown below. The gases have different molecular masses which are not known. Which of the following statements about these gases MUST BE true? Number of Molecules B C Velocity Gas C has the greatest temperature. Gas A has the greatest average kinetic energy per molecule. O Gas C has the greatest average kinetic energy per molecule. O Gas A has the greatest molecular mass. O Gas C has the greatest rms speed. Next.

A quantity of mercury occupies 400.0 cm³ at 0°C. What volume will it occupy when heated to 50°C? Mercury has a volume expansion coefficient of 180 x 10-6 K-1. 450 cm3 401.8 cm3 O403.6 cm³ O409.7 cm3

An ideal gas is kept at constant pressure while increasing its volume from an initial volume of 2 liters to a final volume of 6 liters. The initial temperature of the gas is 300K, what is the final temperature? O 100K O 900K O 1200K O 300K O oo O

How far does the piston move?