The mole fraction of nitrogen in dry air near sea level is ...

[elizabeth18]

The mole fraction of nitrogen in dry air near sea level is 0.78084, where the molar mass of nitrogen is 28.013. The partial pressure of nitrogen when the total atmospheric pressure (dry air) is 97.5 kPa is ________ kPa.
 
  A) 126
  B) 4.51
  C) 77.0
  D) 2.16  103
  E) 2.75

Question 2

Once ATP is depleted, the next available energy source for muscle is from
 
  A) glucose.
  B) glycogen.
  C) fats.
  D) protein.

[patma1981]

Answer to Question 1

C

Answer to Question 2

B