# To three significant figures, calculate the density of each gas at STP in g L-1:?

Ne

O2

CH4 (methane)

CF4

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- Trevor HLv 75 years agoFavorite Answer
At STP , 1 mol of gas has volume of 22.4L

Molar mass Ne = 20.180g/mol

Mass of 1.0L at STP = 20.180/22.4 = 0.901g

Density at STP = 0.901g/L

Molar mass O2 = 32.0 g/mol

Mass of 1.0L at STP = 32/22.4 = 1.43g

Density at STP = 1.43g/L

Molar mass CH4 = 16.043g/mol

Mass of 1.0L at STP = 16.043/22.4 = 0.716g

Density at STP = 0.716g/L

Molar mass CF4 = 88.003g/mol

Mass of 1.0L at STP = 88.003/22.4 = 3.93g

Density at STP = 3.93g/L

Mass

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the answer was correct:) thanks so much:)