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David and Luisa are trying to determine if two samples are the same or different substances. First, they observed sample 1 and sample 2.
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David and Luisa are trying to determine if two samples are the same or different substances. First, they observed sample 1 and sample 2.

User Kaatt
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Answer: Luisa's Observation


Explanation: Luisa's observation is explained better than David's was, and judging by the observations, David studied the same material, while Luisa's observation contained different description, meaning that there was likely more than one substance being observed and studied
User Yong
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