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What is the mass in grams of 11 atoms of potassium?

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1 mol of K = 39 grams (39 is the atomic weight of potassium) 6023 x 10E23 atoms of K = 39 grams 1 atom of K = 39 grams / (6023 x 10E23) 11 atoms of K = 429 / (6023 x 10E23) = 71227 x 10E-23 grams. read more

So, here is how you would figure out the mass of 11 atoms of Potassium. 1 atom of Potassium is 39 amu- this is the mass, in grams, of one mole of Potassium. Mass of one atom= mass of mole of atoms/ 6.022 x 10 to the 23rd. Mass of the mole of one Potassium atom = 39 so , to complete the equation: 39 / 6.022 x 10–23rd. That will give you the conversion to the weight, in grams, for each atom of Potassium. read more

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. read more

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