How does the ratio of h to o atoms in starch compared with the ratio in water?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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.