Is oxygen gas an element or a compound?

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?

What three things determine the shape and size of a puddle when water is poured out onto a surface

How do dying stars contribute to the formation of planets