Wileyplus Chem Help! The structures of solid ionic strength?
A packing element CCP with a face-centered cubic unit cell. Its density is 12000 kg / m 3 and the unit cell volume is 5.89 x 10-26 L. Calculate the molar mass (g / mol) of element three significant digits. how it was done would great, but only one answer is perfect! thanks
like their other two questions … (g / cm ³) x (cc / cell) x (cell / atoms) x (atoms / Mol) = g / mol know the first two and last .. But what about atoms / cell phone? *** Atoms / Cell *** This is one side of centered cubic mesh .. It has 8 corner atoms and 6 atoms in the face .. each corner atom is 8 adjacent cells .. So 1 / 8 of each atom in the corner in a given cell. each face atom exists in two adjacent cells. So 1 / 2 of atoms of each side is in a given cell. 8×1 / 8 + 6×1 / 2 = 4 atoms / cells Now we need to do unit conversions … 12000 kg / m³ x (1 m / 100 cm) ³ x (1000 g / 1 kg) = 1.2 g / cm ³ and 5.89×10 ^ -26 X L (1000 mL / 1 L) x (1 cm ³ / 1 ml) = 5.89×10 ^ -23 cm ³ finally … (1.2 g / cm ³) x (5.89×10 ^ -23 cm ³ / Cell) x (cell 1 / 4 atoms) x (6.022×10 ^ 23 atoms / mol) = 10.6 g / mol
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