9. When an irregularly shaped object is placed into a graduated cylinder, the water level rises from 50.0 mL to 75.0 mL. The object placed on triple beam balance shows a mass of 32.5 gram.
What is the density of the object?

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Which statement describes james chadwick’s discovery.