The Bohr Model of atom is a planetary model in which the negatively charged electrons orbit a small, positively charged nucleus similar to the planets orbiting the sun.
A True
B False

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.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate