How might cancer of the testes affect a man's ability to make sperm

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?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What is the percent by mass of magnesium sulfate in mgso4.7h2o