4. Compute the approximate density of methane, CH4 at STP. I 5. A gas occupying a volume of 725 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? 6. A sample of gas occupies a volume of 625 mL at 22.0 degree C and 1.12 atm. Calculate the new temperature if the volume is changed to 1.15 liter and the pressure is changed to 75.2 cm Hg 7. If the density of carbon monoxide is 3.17 g/L at -20 OC and 2.35 atm, what is the approximate molecular weight?

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Chapter1: Chemical Foundations
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HANDWRITTEN THEN BOX THE FINAL ANSWERS

ASSIGNMENT: GAS LAWS
id wilçuld
14
15
7. If the density of carbon monoxide is 3.17 g/L at -20 OC and 2.35 atm, what is the
approximate molecular weight?
16
Solve the following:
1. A 2.00 gram sample of gas at 27.0 °C and 1.00 atm occupies 1.00 L. What is the
molecular weight of the gas?
2. Compute the volume of 14 grams of nitrous oxide, N₂O, at STP?
3. An electronic vacuum tube was sealed off during manufacture at a pressure of 1.8 x 10-5
torr at 27 °C. Its volume is 100 cm³. Compute the number of gas molecules remaining in
the tube. (6.02 x 10 23 molecules/mole)
4.
Compute the approximate density of methane, CH4 at STP.
I
5. A gas occupying a volume of 725 mL at a pressure of 0.970 atm is allowed to expand at
constant temperature until its pressure reaches 0.541 atm. What is its final volume?
6. A sample of gas occupies a volume of 625 mL at 22.0 degree C and 1.12 atm. Calculate
the new temperature if the volume is changed to 1.15 liter and the pressure is changed
to 75.2 cm Hg
17
18
Transcribed Image Text:ASSIGNMENT: GAS LAWS id wilçuld 14 15 7. If the density of carbon monoxide is 3.17 g/L at -20 OC and 2.35 atm, what is the approximate molecular weight? 16 Solve the following: 1. A 2.00 gram sample of gas at 27.0 °C and 1.00 atm occupies 1.00 L. What is the molecular weight of the gas? 2. Compute the volume of 14 grams of nitrous oxide, N₂O, at STP? 3. An electronic vacuum tube was sealed off during manufacture at a pressure of 1.8 x 10-5 torr at 27 °C. Its volume is 100 cm³. Compute the number of gas molecules remaining in the tube. (6.02 x 10 23 molecules/mole) 4. Compute the approximate density of methane, CH4 at STP. I 5. A gas occupying a volume of 725 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? 6. A sample of gas occupies a volume of 625 mL at 22.0 degree C and 1.12 atm. Calculate the new temperature if the volume is changed to 1.15 liter and the pressure is changed to 75.2 cm Hg 17 18
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