Which geological features most likely prompted the development of the theory of plate tectonics?
a) river deltas
b) glacier fields
c) mountain ranges
d) tropical rainforests

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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 is the way a mixture is combined different from how a compound is combined?