The Concept Of Mole
Calculate the mass of one molecule of sodium hydroxide (NaOH).
Calculate the number of moles in 109.5 grams of hydrogen chloride.
Just like the last example, we have to find the molar mass of the molecule. The molar mass is 35.5 + 1 = 36.5 g/mol.
So, 109.5 grams of HCl correspond to 3 moles of HCl.
You should be able to do these types of conversions back and forth, from grams to moles and moles to grams.
Try the next problem to see whether you have mastered the idea.
Calculate the number of grams in 8 moles of sulfur dioxide.
If your answer is close to 512.8 g, you solved the problem correctly.