a gas with a pressure of 1 atm and a temp of 273.15k occupies a volume of 224L. How many moles are present ?

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How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.