Contrast the magnitudes, to three significant figures, (I) molecules in two moles of CO, (II) molecules in two moles of CO₂, and then select an appropriate response from the response list.

Question

Quizplus · Accepted Answer

The number of molecules in a mole of any substance is defined by Avogadro's number, which is approximately 6.022 x 10^23 molecules per mole. Therefore, two moles of any substance, regardless of its chemical composition, will contain 2 x 6.022 x 10^23 molecules. This means that both (I) two moles of CO and (II) two moles of any other compound, including COS with any isotopes or modifications as suggested by the notation, will have the same number of molecules.

Contrast the Magnitudes, to Three Significant Figures, (I) Molecules in Two