Determine the number of formula units of Cr (ClO2) 3 and moles of Oxygen contained in 6.85 moles of Cr (ClO2) 3

The formula units of Cr (ClO2) 3 that are in 6.85 moles of Cr (Clo203 is 4.1237 x10^24 formula units

calculation

the formula units are calculated using of Avogadro's law constant

that is according to Avogadro's law 1 mole = 6.02 x10 ^23 formula units

6.85 moles=? formula units

by cross multiplication.

= (6.85 moles x 6.02 x10^23 formula units) / 1 mole = 4.1237 x 10 ^24 formula units

The moles of Oxygen contained in 6.85 moles of cr (ClO2) 3 is 41.1 moles

calculation

moles of oxygen = number of oxygen atom in Cr (ClO2) 3 x 6.85 (moles of Cr (ClO2) 3

calculate the number of oxygen atoms that are in Cr (ClO2) 3

that is 2 x 3 = 6 atoms of Oxygen.

moles is therefore = 6 x 6.85 moles = 41.1 moles