Using avogadro's number (6.02*10^23): calculate the number of molecules in 3.00 moles h2s . express your answer numerically in molecules.. calculate the number of moles of cl atoms in 1.81×10^24 formula units of magnesium chloride, mgcl2 .

Explanation:

For this question we have to take into account that the ratio between moles and molecules:

Then, using this ratio we can do the conversion:

For the next question we have to keep in mind that the formula units are a synonym for molecules and we have to use two ratios:

Using these two ratios:

icc, international association for cereal chemistry