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All of the following statements are incorrect except
A. precision and accuracy should go side by side in a scientific work B. scientific work must be precise, accuracy is not essential C. scientific work must be accurate, precision is not essential D. calculations must be made before any experiment
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Correct Answer: A. precision and accuracy should go side by side in a scientific work
Bismark brown is a dye. Its molar mass is 228.3 g/mol. When the dye was analyzed by a scientist, it was found that it contains 30.68% nitrogen. How many nitrogen atoms are there in each Bismark brown molecule?