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

[appyboo]

The mole fraction of krypton in dry air near sea level is 0.00000114 where the molar mass of krypton is 83.80. The concentration of krypton in the atmosphere is ________ ppm.
 
  A) 8.77  1011
  B) 1.14  10-4
  C) 1140
  D) 1.14
  E) 1.14  10-12

Question 2

If sufficient oxygen is available to muscles during energy conversion, the by-products of energy production are water and
 
  A) pyruvic acid.
  B) lactic acid.
  C) carbon dioxide.
  D) ATP.

[joanwhite]

Answer to Question 1

D

Answer to Question 2

C

[appyboo]

TY

[joanwhite]

You're welcome