Calculate the number of particle in 8 g `O_(2)` molecules (number of molecules from mass)

Explanation

The number of molecules = `("given mass")/("molar mass") xx ` Avogadro number
`implies N = (m)/(M) xx N_(0)`
Atomic mass of oxygen = 16 u
`therefore` Molar mass of `O_(2)` molecules = `16 xx 2 = 32` g
`implies N = (8)/(32) xx 6 *022 xx 10^(23)`
`= 1*51 xx 10^(23)`