1. Convert 480. lbs. to SI.
Answer:

2. Convert 236 torr to atm.
Answer:

3. How many significant figures: 26.2 + 100.
Answer:

4. Which of these has a negative charge?
Protons Neutrons Electrons Quarks None of these

5. How many protons in sodium-23?
11 12 23 1 0

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