Question

The mole fraction of argon in dry air near sea level is 1.819 × 10⁻⁵, where the molar mass of argon is 39.948. The concentration of argon in the atmosphere is ________%.

a. 0.005
b. 0.018
c. 0.500
d. 1.819

Answer 1

The concentration of argon in the atmosphere is approximately 0.001819%.

Step-by-step explanation:

The mole fraction of argon in dry air near sea level is 1.819 × 10⁻⁵. To find the concentration of argon in the atmosphere, we can convert the mole fraction to a percentage. Multiply the mole fraction by 100 to get the percentage:

Mole fraction of argon = 1.819 × 10⁻⁵
Percentage of argon = (1.819 × 10⁻⁵) × 100 = 0.001819%

Therefore, the concentration of argon in the atmosphere is approximately 0.001819%.