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There are 1.895X10^23 atoms in 12.3 grams of potassium. Potassium is a chemical element with the symbol K and the atomic number 19. The Atomic Mass of potassium is 39.0983 unified atomic mass units.

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Q: How many atoms are in 12.3 g of potassium?

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5,868.1023 atoms

449 (g K) / 39.1 (g/mol K) = 11.5 mol K

449 g K x 1 mole K/39 g K = 11.5 moles (3 sig figs)

there are 500210 g of atoms

51.06 g (6.02 x 1023 atoms) / (196.97 g) = 1.56 x 1023 atoms Au

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5,868.1023 atoms

.01456 g (6.02 x 1023 atoms) / (39.1 g) = 2.24 x 1020 atoms

The number of K atoms is 1,9253.10e23.

2.81 x 1023 atoms

The number of potassium atoms is 2,04.10e21.

The molar mass of potassium is 39,0983(1) g.

6.023×10^23

7.20 moles K x 39.1 g/mole = 281.52 g K = 282 g K (to 3 significant figures)

300 g of potassium is equal to 7,67 moles.

123 g = 4.33869 oz123 g = 4.33869 oz123 g = 4.33869 oz123 g = 4.33869 oz123 g = 4.33869 oz123 g = 4.33869 oz

two elements and two atoms (potassium and chlorine)In one molecule of KCl, there are two elements (potassium and chlorine).The molecular weight of KCl is 74.55 g / mol.So, 74.55 g of KCl will contain 6.023 x 1023 molecules or 12.046 x 1023 atoms.

The atomic mass of potassium is 39 ,therefore the number of mole is 39 /39,which is 1then multiple by Avogadro number you get 6.022*10^24

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