how do you find how many atoms are in 3 x 10^-10?

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how do you find how many atoms are in 3 x 10^-10?

2006-12-11 13:07:38 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

3 answers

You haven't said 3 x 10^-10 of what, so I shall suppose that you mean mols of gold. Also, to make things clearer, I shall make that 30 x 10^-11 mol Au.

30 x 10^-10molAU x 6 x 10^23atomsAu/1molAu = 5 x 10^13 atoms Au

2006-12-11 13:14:23 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

You have 6.02 x 10^23 atoms per mole of an element, the Avogadro no. So you can calculate from this.

2006-12-11 21:13:21 · answer #2 · answered by DC 4 · 0⤊ 0⤋

the units are moles u would multiply by 6.02 * 10^23, avagados number, if those are grams which i doubt u need to covert to moles first.

2006-12-11 21:11:04 · answer #3 · answered by Jake L 3 · 0⤊ 0⤋