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The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W?

Blair Lewis

in Chemistry

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1 answer

Caroline Campbell on September 25, 2018

From the density, 19.3 g/cm3, each cubic centimeter of tungsten (W) has a mass of 19.3 grams. Determine the amount of substance in moles by dividing the mass by the molar mass, (19.3 g) x (1 mol/ 183.84 g) = 0.1044 molesThe the number of atoms is calculated by multiplying the amount in moles by the Avogadro's number. (0.1044 moles) x (6.022x10^23 atoms / mol) = 6.29x10^22 atoms. Therefore, there are about 6.29x10^22 atoms of W.

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