# How many grams of carbon dioxide are contained in 550 mL of this gas at STP?

I know the answer is 1.1 g .. how do I get that answer?!? please help!!!

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- chemmieLv 41 decade agoFavorite Answer
STP = 1 atm and 273K.

PV=nrT

(1) (.550)* = n (.0821) (273)

(*converting mL to L)

Solve for n, then multiply n (number of moles) by the molar mass of CO2.

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- 1 decade ago
use factor label as shown here:

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