How many moles do 8.1×1018 calcium atoms represent?

1 Answer
anor277
Jan 30, 2016

Approx. 1100000th of a mole.

Explanation:

In 1 mol of particles there are 6.022 × 1023 individual particles. So we just divide the quoted number by this, Avogadro's number, to get an answer in mol.

8.1×1018 calcium atoms6.022×1023 calcium atoms⋅mol−1 = ?? mol

What is the mass of this number of calcium atoms?

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