Convert 18.82 L NO gas (At STP) to grams:

(Answer) grams (4 SF)

Explanation:

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In this case, since the STP conditions are known as 273.15 K of temperature and 1.00 atm of pressure, we can use the ideal gas equation to compute the moles of NO gas first:

Next, since the molar mass of NO is 30.01 g/mol the resulting mass in grams is:

Which has four significant figures.

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