What is the Roman numeral for Hg(C2O4)

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?

Compare and contrast physical changes with chemical changes.

Which of the following units is not an official si unit