12 report sheet · basic laboratory techniques\n8. why should you never determine the mass of a hot…
12 report sheet · basic laboratory techniques\n8. why should you never determine the mass of a hot object?\n9. why is it necessary to calibrate a thermometer and volumetric glassware?\n10. what is precision?
Answer
Brief Explanations:
- Question 8: A hot object can damage weighing equipment and cause inaccurate mass readings due to air - current effects and thermal expansion.
- Question 9: Calibrating thermometers and volumetric glassware ensures accurate temperature and volume measurements respectively, as manufacturing tolerances and environmental factors can affect their accuracy.
- Question 10: Precision refers to the degree of agreement among repeated measurements under the same conditions, indicating the reproducibility of a measurement.
Answer:
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- A hot object can damage weighing equipment and give inaccurate mass readings due to air - current and thermal expansion effects.
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- To ensure accurate temperature and volume measurements as manufacturing tolerances and environmental factors can affect accuracy.
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- Precision is the degree of agreement among repeated measurements under the same conditions, indicating measurement reproducibility.