Samantha bought 450 rolls of toilet paper for her family to use while they are stuck at home. There are 4 people in her family. If each person uses an average of 20 squares of toilet paper a day and each roll has 950 squares, how many days will Samantha's stock of toilet paper last?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids