A118.63 g sample of srcl2·6h2o was heated and 34.81 grams of water were recovered from the sample. what percent of the original h2o remains in the sample following this heating?

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

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?