The Mole Fraction of Neon in Dry Air near Sea

Multiple Choice

The mole fraction of neon in dry air near sea level is 1.818 × 10^{- 5} where the molar mass of neon is
20) 183. The concentration of neon in the atmosphere is _ _ ppm.

A) 1.818 × 10^{- 11}
B) 1.818 × 10⁴
C) 18.18
D) 5.50 × 10¹⁰
E) 0.001818