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Post-Lab Questions1.   What was the percent of sand after filtration?

2.   What was the percent of salt after filtration?

3.   Discuss the likely reasons for why you got the results you obtained. What are some possible non-human sources of error that could account for your results? Use your observations to support your conclusions.

4.   Summarize in a well-written paragraph how your results support the law of conservation of mass (you should begin with a definition of the law of conservation of mass).

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