A 5.67⋅g mass of chromium metal represents what molar quantity?

1 Answer
anor277
May 9, 2016

Moles=MassMolar Mass

Explanation:

Moles of Chromium=Mass of chromiumMolar mass of chromium

= 5.67⋅g51.99⋅g⋅mol−1 = 0.109⋅mol

So what is a mole? It is simply a number, 6.022×1023. It is a fact that Avogadro's number of chromium atoms have a mass of 51.99⋅g. Thus Avogadro's number, NA, is the link between the micro world of atoms and molecules, to the macro world of grams and litres, that which we can suitably measure in a lab.

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