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Author Question: A sample of gas (1.9 mol) is in a flask at 21 C and 697 mm Hg. The flask is opened and more gas is ... (Read 108 times)

Deast7027

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on: Aug 27, 2018
A sample of gas (1.9 mol) is in a flask at 21 C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new pressure is 841 mm Hg and the temperature is now 26 C. There are now ________ mol of gas in the flask.
 
  A) 1.6
  B) 2.3
  C) 2.9
  D) 3.5
  E) 0.28

Question 2

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 4.554 g of CO2 and 2.322 g of H2O. What is the empirical formula of the compound?
 
  A) CH2
  B) C2H5
  C) C4H10
  D) C5H2
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
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dawsa925

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Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

B


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