Question
Asked Sep 21, 2019

8. A certain anesthetic contains 64.9 percent carbon, 13.5 percent hydrogen, and 21.6 percent oxygen by mass. At 120°C and 750 mmHg, 1.00 L of the gaseous compound weighs 6.90 g. What is the molecular formula of the compound?

check_circleExpert Solution
Step 1

Given:

Temperature T = 120 ℃ = 393 K.

Pressure = 750 mmHg = 0.987 atm.

Mass = 6.90 g.

Volume = 1.00 L.

Step 2

Calculation for number of moles:

РXV3nXRxT
РXV
R x T
0.987 atm X 1.00 L
0.0821 L.atm.mol-1.K-1 x 393 к
n 0.0306 moles
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РXV3nXRxT РXV R x T 0.987 atm X 1.00 L 0.0821 L.atm.mol-1.K-1 x 393 к n 0.0306 moles

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Step 3

Calculation for molar m...

Mass
Number of moles
Molar mass
Mass
Molar mass
number of moles
6.90 g
Molar mass
0.0306 mol
Molar mass
225.5 g/mol
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Mass Number of moles Molar mass Mass Molar mass number of moles 6.90 g Molar mass 0.0306 mol Molar mass 225.5 g/mol

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