PLEASE HELP ME WITH THIS

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

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned