A chemist burns 160 g of Al in excess air to produce aluminum oxide, Al203. She produces 260 g of aluminum oxide. The molar mass of aluminum oxide is 101.96 g/mol. Write a balanced equation for the reaction. AL + O, E ALO, (a) Determine the theoretical yield (b) Determine the percent yield.

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?

15. what volume of cci, (d = 1.6 g/cc) contain6.02 x 1025 cci, molecules (ci = 35.5)(1) 10.5 l(2) 250 ml(3) 9.625 l(4) 1.712 lplz answer with step by step explanation