Chemistry, 17.09.2019 06:00 raeprince9213
By making several measurements with the same balance, a chemist obtained values of 5.224 g, 5.235 g, and 5.259 g for the mass of a sample. without knowing the actual mass of the sample, we can tell that these measurements have .
a) good precision
b) good accuracy
c) poor precision
d) poor accuracy
Answers: 2
Chemistry, 22.06.2019 12:10, yootmytoot
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.
Answers: 1
Chemistry, 23.06.2019 11:50, halllawson
What is the oxidation half-reaction for this unbalanced redox equation? cr2o72– + fe2+ → cr3+ + fe3+ cr3+ → cr2o72– cr2o72– → cr3+ fe3+ → fe2+ fe2+ → fe3+?
Answers: 2
By making several measurements with the same balance, a chemist obtained values of 5.224 g, 5.235 g,...
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