Which of the following is not an example of a physical change? a. mixing c. grinding b. melting d. decomposing

Identifying limitations of kinetic-molecular theorya chemist is studying the properties of a gas under various conditions. he observes that when the gas is at room temperature and low pressure, it behaves as an ideal gas. when the gas is cooled to 10 kelvin and is placed under high pressure, however, it deviates significantly from an ideal .

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer