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What is the mass of 99.0 L of NO2 at STP

User WelcomeTo
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Under STP, the gas has a rule which is for every gas, one mole will have a volume of 22.4 L. So the 99.0 L of NO2 is 4.42 mol. The gram formula mass of NO2 is 46. So the mass is 203.32 g,
User Matei Radu
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