How many formula units are in 1.50 moles of NaCl?

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?

Which element would mostly likely have an electron affinity measuring closest to zero

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?