2Al(s) + Fe2O3(s) → Al2O3(s) + 2Fe(s) H = -850 J 1. How much energy would be released if 5.2 moles of aluminum reacted with excess iron (III) oxide?

2. If you started this reaction with 4.9g of aluminum, how much energy would be produced?

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.