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Explanation: One mole of anything, no matter what the element is, is Avogadro's number, which is 6.02 * 10^23 atoms.
One mole of Calcium is equal to it's atomic weight in grams :
1 mole Ca = 40.08 g = 6.02 * 10^23 atoms
There is a 1000mg in a gram. 1000mg * 40.08g =
=40,080mg of Ca per mole
If you have 8.6mg of Ca that is 8.6mg / 40,080mg = .00021457 of a mole of calcium
so just multiply that by Avogadro's number to give you number of atoms:
.00021457 * 6.02 * 10^23 atoms = 1.292 * 10^20 atoms of Ca
A mole is the amount (10) of material containing [tex]6.02214 * 10^{23}[/tex] particles.
1 mol = [tex]6.02214 * 10^{23}[/tex] particles. This number is also called Avogadro's number
One mole of Calcium is equal to it's atomic weight in grams :
[tex]\text{1 mole Ca} = 40.08 g = 6.02 * 10^{23} \text{ atoms}[/tex]
a) 1g=1000mg
[tex]1000\text{ mg} * 40.08g = 40,080 \text{ mg of Ca per mole}[/tex]
If you have 8.6mg of Ca that is
[tex]\frac{8.6mg}{40,080mg} =0 .00021457 \text{ mole of Ca}[/tex]
In terms of Avogadro number:
[tex]0.00021457 * 6.02 * 10^{23} atoms = 1.292 * 10^{20} \text{ atoms of Ca}[/tex]
b) The number of moles of H₂O will be:
[tex]3.4*10^{26}*6.022*10^{23}\\\\20.47*10^{49} \text{moles}[/tex]
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