Amount of Substance and the Mole (OCR A-Level Chemistry A): Flashcards

Amount containing exactly $6.02 imes 10^{23}$ particles

$6.02 imes 10^{23}$ mol$^{-1}$

Mass per mole of a substance (g mol$^{-1}$)

n = rac{m}{M}

Its relative atomic mass ($A_r$) in grams

H = atoms; H₂ = molecules (H₂ has twice as many H atoms)

$14.0 + 16.0 imes 2 = 46.0$ g mol$^{-1}$

$m = n imes M$

M = rac{m}{n}

g mol$^{-1}$