Why does an astronaut weigh less on the Moon than on Earth?
A) The astronaut has less mass on the Moon.
B) The astronaut is farther from Earth's center.
C) The gravitational field strength is less on the Moon's surface than on Earth's surface.
D) The astronaut is in a state of free-fall.

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.