You know that there are 12 items in a dozen. No matter what the item, a dozen is equal to 12. A gross is another unit of grouping. There are 144 items in a gross. A score, another set group, is equal to 20 items. You can have a score of years or a score of rocks, but it will always be 20 items. Now, a mole is a unit of grouping, just like these examples. The only difference is that a mole represents a large number of items, 602 000 000 000 000 000 000 000 (or 6.02 x 1023) items to be more specific. What the items are doesn't matter. You can have a mole of molecules, a mole of ions, or a mole of stars. The number of items in a mole will always be 6.02 x 1023 . This number is known as Avogadro's number.
6.023 x 10 to the power of 23 is the number of Atoms in a Mole (A mole is the amount of a substance that contains the same number of units of atoms or molecules or ions, as there are atoms in 12 g of Carbon)
6.023 x 10 to the power of 23 is called Avogadro's Number.
For more information see http://www.tutorvista.com/content/chemistry/chemistry-ii/stoichiometry/mole-concept.php
602,000,000,000,000,000,000,000
Avogadro's number
15 moles3 moles potassium3 moles nitrogen9 moles oxygen15 X 6.022 X 10 to the 23rd power
Using avagadro's number of 6.022 x 10 to the 23rd atoms/mole. The answer is 1.99 moles of gold
6.02*10(to the 23rd)
6.7x10-10, 6.7 x 10-10, 6.7x10 -10, 6.7 x 10 -10
First, look up the atomic mass of calcium: 40.08 grams per mole 143 grams, divided by 40.08 grams per mole, results in 3.57 moles. Since you specifically asked for the number of ATOMS, multiply by Avogadro's number, 6.02 x 10-to-the-23rd-power atoms per mole. Final answer: 2.15 x 10-to-the-24th power atoms.
602 = (6 x 100) + (0 x 10) + (2 x 1)
6.02 x 10^2
327,000,000,000,000,000,000,000
602,000,000,000,000,000,000,000
602 = 6.02 x 10^2
602,000,000,000,000,000,000,000
You have a few choices:1 x 602 x 303 x 204 x 155 x 126 x 10
8.859 x 10-24 feet
541198
2 x 7 x 43
50.1667
6 + 1,800 = 1,806