How many moles of h2o will be produced from 42.0g of h2o2? i need the equations for what to do because i am not sure how to do it.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Based on its chemical properties, identify the position of each chemical family on the periodic table.

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.