The density of a substance having a mass of 9 x 105 g and a volume of 3 × 10-1 cm3

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?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

How are isotopes of the same chemical element alike? how are they different?