Heat is added to a 200.-gram sample of h2o(s) to melt the sample at 0°c. then the resulting h2o (image) is heated to a final temperature of 65°c. determine the total amount of heat required to completely melt the sample.

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.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Connect the whole numbers on the periodic table to indicate what they represent?