a u. s. quarter (5.670 g) contains 91.67% cu and a u. s. dollar coin (8.100 g) contains 88.5% cu. which coin contains the greater mass of cu and how much copper is in that coin?

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 of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

Consider the story you just read. all but one of the choices below indicate that something is living.