1. A rigid steel cylinder with a volume of 30 L is filled with nitrogen gas to a final pressure of 123 atm at 30 C. How many moles of N 2 gas does the cylinder contain? PV = nRT
K= + 273 =
C + 273 =
R=0.0821 L x atm/K x mol
PV = nRT
n=P XV=
R XT

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

hloride, what is the mass of calcium in

explanation: