Question

0.68 moles of calcium to calcium atoms​

Answer 1

`0.68 \: moles \: calcium * \frac{6.02 * {10}^(23) \: calcium \: atoms }{1 \: mole \: calcium} \\`

The (( mole calcium ))s are simplified so the answer is based on the number of calcium atoms.

`0.68 * 6.02 * {10}^(23) = 68 * {10}^( - 2) * 602 * {10}^( - 2) * {10}^(23) \\`

`= 68 * 602 * {10}^( - 4) * {10}^(23) = 40936 * {10}^(19) \\`

`calcium \: atoms = 40936 * {10}^(19) \\`

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And we're done.

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