A sealed container of nitrogen gas contains 70,000 molecules. As the temperature increase, the mass of the nitrogen will .

increase
decrease
stay the same

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Which element would mostly likely have an electron affinity measuring closest to zero

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?