2. Anna the Analyst obtained a sample of a very cold liquid. By performing a mas
ID: 715673 • Letter: 2
Question
2. Anna the Analyst obtained a sample of a very cold liquid. By performing a mass spectrometry measurement, she determined that the liquid contained only nitrogen and helium, but it was not possible to determine the ratio precisely because the mass spectra in this case were not quantitative. Thus, she performed an additional nt in which she was able to precisely vaporize 10 grams of the liquid into a 10 L flask attached to a barometer, as we discussed in lecture. a. If the liquid was pure nitrogen, what pressure would you expect Anna would measure? b. If the liquid was pure helium, what pressure would you expect? c. In fact, Anna measured a pressure of 0.90 atm. What is the molar ratio of nitrogen to helium in the sample?Explanation / Answer
Your question lacks proper data. You must specify temperature conditions whever you talk about pressure and experimental data.
Still I am suggesting a solution to your question that you may find helpful. You can use IdeaI Gas Equation i.e.
PV=nRT
where
P= Pressure of gas
V= volume of gas
R= Gas constant
T= Temperature
n=no. Of moles of gas
No. Of moles of a gas= mass of gas in gram÷ molar mass of gas
In present question you have for Nitrogen-
Volume = 10 litres
n = 10÷28
R=0.0821 litre atomsphere degree--1 mol--1
P=?,
T= you must have skipped this value in question.
Similarly you can proceed for Helium.
Hope this was helpful.
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