I NEED THIS ASAP PLEAS Which of the following contains the largest number of atoms?
O 82.0 mole of Kr
O 0.842 mole of C2H4
o 36.0 moles of N2
O 0.5 moles of water

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.