Which type of molecule is shown below?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

How many moles are in 123.0 grams of kclo4?