1. Which of these is a mixture?
Uranium Table Salt (NaCl) Iron Steel Water

2. Which of these has 23 protons?
Scandium Titanium Vanadium Chromium None of these

3. How many significant figures: 1.003080

4. Convert 236 torr to atm.

5. Which of these is a pure substance?
Blood Ocean Brass Wine Table Salt (NaCl)


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