PLEASE HELP 2. A 20.0 gram sample of oxygen gas (O2) is collected at 27 oC and 0.910 atm. What volume of oxygen is this?
A.16.9 L
B.1.22 L
C.1.52 L
D.20.9 L

4.What is the molecular weight of a gas with a density of 1.20 g/L at 750 mmHg and 20 oC?

A. 9.20 g/mol
B.19.2 g/mol
C.49.2 g/mol
D.29.2 g/mol

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .