Problem: Xenon is the heaviest stable noble gas with a molar mass of 131 g/mol.Table 10.1 Some Common Compounds That Are Gases at Room TemperatureFormulaNameCharacteristicsHCNHydrogen cyanideVery toxic, slight odor of bitter almondsH2SHydrogen sulfideVery toxic, odor of rotten eggsCOCarbon monoxideToxic, colorless, odorlessCO2Carbon dioxideColorless, odorlessCH4MethaneColorless, odorless, flammableC2H4Ethene (Ethylene)Colorless, ripens fruitC3H8PropaneColorless, odorless, bottled gasN2ONitrous oxideColorless, sweet odor, laughing gasNO2Nitrogen dioxideToxic, red-brown, irritating odorNH3AmmoniaColorless, pungent odorSO2Sulfur dioxideColorless, irritating odorDo any of the gases listed in the table above have molar masses larger than Xe?

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We’re being asked to determine if the gases listed in the table has a molar mass greater than Xe

HCN, H2S, CO, CO2, CH4, C2H2, C3H8, NO, NO2, NH3, SO2

 

We will determine the molar mass of each given gas and compare it to the molar mass of Xe. The given molar mass of Xe is 131 g/mol.


For each gas, we will multiply each atomic mass by the number present in the chemical formula and then add them together to get the molar mass.


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Problem Details

Xenon is the heaviest stable noble gas with a molar mass of 131 g/mol.


Table 10.1 Some Common Compounds That Are Gases at Room Temperature
FormulaNameCharacteristics
HCNHydrogen cyanideVery toxic, slight odor of bitter almonds
H2SHydrogen sulfideVery toxic, odor of rotten eggs
COCarbon monoxideToxic, colorless, odorless
CO2Carbon dioxideColorless, odorless
CH4MethaneColorless, odorless, flammable
C2H4Ethene (Ethylene)Colorless, ripens fruit
C3H8PropaneColorless, odorless, bottled gas
N2ONitrous oxideColorless, sweet odor, laughing gas
NO2Nitrogen dioxideToxic, red-brown, irritating odor
NH3AmmoniaColorless, pungent odor
SO2Sulfur dioxideColorless, irritating odor


Do any of the gases listed in the table above have molar masses larger than Xe?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.