if you had a 200 gram sample of gold and a 7 gram sample of gold, how would the densities of the two samples compare? Explain your answer.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Substance 33°f 100°f peanut oil solid liquid margarine solid liquid chocolate chips solid liquid which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.