What factor was most important to Mendelev in knowing when to end a row (period) and start a new one?

Ineed with my science work! it’s due tomorrow!

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

An experimental procedure requires a 10 ml of acid to be dissolved