Which of the following would convert chemical energy to mechanical energy? Group of answer choices
Jet Ski

Cars

Humans

All of the above

What must happen before a body cell can begin mitotic cell division

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

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.