Suppose that 70g of a substance is dissolved in 100cm^3 of water at 80°c. how much of the substance, in grams, will precipitate when the solution is cooled down to 30°c?

a. 55
b. 45
c. 10
d. 30
e. 25

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Can someone me with questions 12 and 13 plz.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?