31. If 6 moles of oxygen reacts with an excess amount of aluminum, how many grams of aluminum oxide will be produced?

How many grams of n2h4 will be consumed by 23 g of n2o4

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?