I didn’t get any help my recent question so I’m posting it again to see if anybody sees it this time Question!!!
Determine half life exploration of isotopes

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

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.