Question The relative molecular mass of the oxalic acid is 90 and its composition by mass is Carbon = 26.7% Hydrogen = 2.2% Oxygen = 71.1%
Calculate the empirical and molecular formula?

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.

How does climate change cause the ocean's thermohaline current to slow down?

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver