How many atoms in 12 moles of oxygen

Draw the structure for 5-isopropyl-2-methyl-3-nonene

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Select the statement that describe chemical properties a. antacid tablets neutralize stomach acid b. helium is the lightest monatomic element c. water freezes at 0 celsius d. mercury is liquid at room temperature