What element in what group and period shares the same physical and chemical properties as chlorine

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

No copying 15 pts how does a free-body diagram tell you about the net force on an object?