Calculate each of the following using Avogadro\'s number: A.) number of Li atoms

Question

Calculate each of the following using Avogadro's number: A.) number of Li atoms in 4.5 moles of Li B.) Number of CO2 molecules in 0.0180 mole ofCO2 C.) Moles of Cu in 7.8 x 10 21 atoms ofCu D.) moles of C2H6 in 3.75 x1023 molecules of C2H6 Calculate each of the following using Avogadro's number: A.) number of Li atoms in 4.5 moles of Li B.) Number of CO2 molecules in 0.0180 mole ofCO2 C.) Moles of Cu in 7.8 x 10 21 atoms ofCu D.) moles of C2H6 in 3.75 x1023 molecules of C2H6 C.) Moles of Cu in 7.8 x 10 21 atoms ofCu D.) moles of C2H6 in 3.75 x1023 molecules of C2H6 D.) moles of C2H6 in 3.75 x1023 molecules of C2H6

Explanation / Answer

A) Number of Li atoms = 4.5 x 6.022 x 1023 = 2.71 x1024 atoms B) Number of CO2 molecules = 0.018 x 6.022 x1023 = 1.08 x 1022 molecules C) n(Cu) = (7.81 x 1021)/(6.022 x 1023) =0.01297mol D) n(C2H6) = (3.75 x 1023) /(6.022 x 1023) = 0.623mol Hope this helps!

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