What defines a mixture? a) a mixture contains different substances that are chemically combined. b) a mixture contains different substances that are not chemically combined and can be broken down into its basic substances through physical means. c) a mixture is created through a chemical reaction.

What happens when light is scattered?

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.

The sum of the oxidation numbers in a neutral compound is always