Chemistry, 12.12.2020 16:10 abbeymorris3184

A student is conducting an investigation to determine the identity of an unknown substance. The following data were collected:
1. The substance is yellow
2. The substance melts at 273 degrees Celsius
3. When placed in water the substance floats
4. When in the presence of a flame, the substance does not burn.
5. When the substance is added to hydrochloric acid, a gas forms and a
temperature change occurs.
Which of these observations represent physical properties of the substance?

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