Calculate the indicated quantities for each example. (a) mass, in grams, of 4.87

Question

Calculate the indicated quantities for each example. (a) mass, in grams, of 4.87 x 10-3 mol ofCdS       _____ g (b) number of moles of NH4Cl in 117.9 g of thissubstance       _____ mol (c) number of molecules in 1.326 x 10-2 molC6H6      _____ molecules (d) number of O atoms in 5.97 x 10-3 molAl(NO3)3      _____ O atoms Calculate the indicated quantities for each example. (a) mass, in grams, of 4.87 x 10-3 mol ofCdS       _____ g (b) number of moles of NH4Cl in 117.9 g of thissubstance       _____ mol (c) number of molecules in 1.326 x 10-2 molC6H6      _____ molecules (d) number of O atoms in 5.97 x 10-3 molAl(NO3)3      _____ O atoms      _____ O atoms

Explanation / Answer

a) MW = 144.5 g/mol 4.87e-3 mol *(144.5 g/ mol) = 0.704 grams b) MW = 14 + 4*1 + 35.5 = 53.5 g/mol 117.9 g *( 1mol/53.5 g) = 2.20373832 ~ 2.204 moles c) 1.326e-2 moles*(6.022 e23 molecules/mol) = 7.985 x10^21molecules d) 5.97e-3 mol Al(NO3)3 *(9 mol O / 1mol Al(NO3)3) *(6.022e23 atoms /mol) = 3.24 x 10^22 O atoms EDIT: add sig figs for b and c For d), are you just pasting 3.24x10^22 ? You might need to put it in this form, 3.24e22, but I don't knowhow your program works. Let me know

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