A 13.5g sample of gold is heated and then placed in a container of 60.0g H20. The
temperature of water increases from 19.0°C to 20.0°C. What was the initial
temperature of the gold metal sample? (The specific heat of gold is 0.13J/gºC).

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?