l14l2017 11:55 PM 9.215 5/10/2017 10:14 PM Print Calculator Periodic Table Incor
ID: 528918 • Letter: L
Question
l14l2017 11:55 PM 9.215 5/10/2017 10:14 PM Print Calculator Periodic Table Incorrect Sapung Learning The density of solid Wis 19.3 g/cm How many atoms are present per cubic centimeter of w? 2.24 x 10 atoms cm 3 To convert from grams to moles, use the molar mass of the metal. To convert moles ot atoms, use Avogadro's number. As a solid, W adopts a cubic unit How many unit cells are present per cubic centimeter of W? 4.14 x 10 unit cells/cm What is the volume of a unit cell of this metal? 2.42 x 10 Ghat euhe edge length of a unit cell of w? 2.89 x 10 e Previous Gve up s View soluton Tr Again e Neot Edt (9Explanation / Answer
The density of w is 19.3 g/cm^3 how many atoms are present per cubic centimeter of W
From the given density, 19.3 g/cm³,
tungsten (W) has a mass = 19.3 grams.
Determine the amount of substance in moles by dividing the mass by the molar mass,
=
(19.3 g) x (1 mole/ 183.84 g) = 0.1044 moles
=number of atoms = amount in moles * the Avogadro's number.
= (0.1044 moles) x (6.022x10^23 atoms / moles) = 6.29x10^22 atoms.
= 6.29x10^22 atoms of W. -answer
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