Question

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

(Answer) grams (4 SF)

Answer 1

`m=25.20gNO`

Step-by-step explanation:

Hello!

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:

`PV=nRT\\\\n=(PV)/(RT)=(1.00atm*18.82L)/(0.08206(atm*L)/(mol*K)*273.15K)=0.8396molNO`

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

`m=0.8396 molNO*(30.01gNO)/(1molNO)\\\\m=25.20gNO`

Which has four significant figures.

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