How many moles of ammonia could be obtained from a maximum of 5.0 moles of nitrogen?

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.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?