You add 8.0 g of iron to 29.00 mL of water and observe that the volume of iron and water together is 30.02 mL . Calculate the density of iron.

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

How are isotopes of the same element alike?

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose