6) A student performed an analysis of a sample for its calcium content and got the following results: 14.92%, 14.91%, 14.88%, 14.91%
The actual amount of calcium in the sample is 15.70%. What conclusions can you draw about the accuracy and
precision of these results?

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

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.

Draw the structure for 5-isopropyl-2-methyl-3-nonene