Solve the following using dimensional analysis.
1) If 6.70 moles of aluminum reacts with an excess of chlorine, how many moles of aluminum chloride is produced?
2Al + 3Cl2 ->2AICl3
2) When sodium hydroxide reacts with sulfuric acid, sodium sulfate and water is produced. How many moles of sodium hydroxide would be needed to produce 20.0 moles of sodium sulfate?
2NaOH + H2SO4 -> Na2SO4 + 2H2O
3) Determine the number of moles of chromium(III) oxide produced when 4.58 moles of chromium is allowed to react.
4Cr + 302 -> 2Cr2O3
4) A piece of magnesium burns in the presence of oxygen, oxide? forming magnesium oxide. How many moles of oxygen are needed to produce 4.0 moles of magnesium
2Mg + O2 -> 2MgO

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