From the periodic table: mass of carbon = 12 grams mass of hydrogen = 1 gram mass of chlorine = 35.5 grams Therefore, molar mass of CH2Cl2 = 12 + 2(1) + 2(35.5) = 85 grams
number of moles = mass / molar mass number of moles of CH2Cl2 = 66.05 / 85 = 0.777 moles
One mole of CH2Cl2 contains two moles of Cl and each chlorine mole has Avogadro's number of atoms in it. Therefore, number of chlorine atoms in 0.777 moles of CH2Cl2 can be calculated as follows: number of atoms = 0.777 * 2 * 6.022 * 10^23 = 9.358 * 10^23 atoms
Now, we will take log base 10 for this number: log (9.358 * 10^23) = 23.97119
