10. What would be the partial pressure of hydrogen in a mixture of nitrogen, oxy
ID: 549817 • Letter: 1
Question
10. What would be the partial pressure of hydrogen in a mixture of nitrogen, oxygen, and hydrogen with an overall pressure of 20 atm if the partial pressure of the nitrogen was 15 atm and the partial pressure of the oxygen was 3 atm? (4 points) 11. If a 250 mL sample of gas at 100°C is allowed to cool to 0.0 °C, at constant pressure, what would be the new volume? (4 points) 12. What is the molecular weight of a gas if 0.376 grams of the gas was found to occupy a volume of 0.250 L at 373 K and 1 atm pressure? (4 points) 13. If you measured the boiling point of water at 10,00 ft, the boiling point would be (3 points) (a) lower than at sea level (b) higher than at sea level (c) the same both places it's still waterExplanation / Answer
10)
Total pressure is sum of individual pressures
So,
Ptotal = pH2 + pN2 + pO2
20 atm = pH2 + 15 atm + 3 atm
pH2 = 2 atm
Answer: 2 atm
11)
we have:
V1 = 250 mL
T1 = 100 oC
= (100+273) K
= 373 K
T2 = 0.0 oC
= (0.0+273) K
= 273 K
we have below equation to be used:
V1/T1 = V2/T2
250 mL / 373 K = V2 / 273.0 K
V2 = 183 mL
Answer: 183 mL
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