The 5 Empirical Observations of Chemistry 1. Color change 2. Gas production (bubbling, fizzing) 3. Formation of a precipitate (solid appears) 4. Temperature change (hotter or colder not caused by outside heating) 5. Emission of light (glow sticks, flames)

True or False: Solutes are things that are dissolved (like salt/sugar) true false

24. Write a chemical equation that accurately represents what happens when sulfur(S) and oxygen (O_(2)) react to form sulfur trioxide (SO_(3)) Make sure you balance the equation.

In which type of bond are electrons transferred? covalent ionic

Aluminum produces lots of thick, white smoke. The biggest issue with this smoke is that the fumes associated with aluminum __ sharp Decrease vistathy

What is the mass of 0.513 mol Al_(2)O_(3) Give your answer to the correct number of significant figures. (Molar mass of Al_(2)O_(3)=102.0g/mol) 0.513 mol Al_(2)O_(3)=square gAl_(2)O_(3)