Calculate the amount of heat required to raise the temperature of a 22-g sample of water from 7 degrees celsius to 18 degrees celsius?

An observation that requires measurement is called quantitative observable or qualitative

What is the independent variable in this investigation? mass volume sample number substance density

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).