Which level of organization best describes the human body shown in the diagram? a. organ b. tissue c. organ system d. cell

How many moles of al3+ ions are in 1.25 moles of al2o3

Drug abuse will not lead to physical and psychological dependence. true or false ?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided