David and Luisa are trying to determine if two samples are the same or different substances. First, they observed sample 1 and sample 2. Then, they wrote down their observations. Review their observations. Then, answer the questions below.
Which student’s observations would prove more useful to a chemist?
David's observations
Luisa's observations
Explain your answer below.
![David and Luisa are trying to determine if two samples are the same or different substances First they observed sample 1 and sample 2 Then they wrote down their class=](https://us-static.z-dn.net/files/da9/1a9a738eba53b918407a4f5e21165e23.png)