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1. How many significant figures: 408
Answer:

2. 26.01/4.0
6.5 6.50 6.503 7 All of these

3. Convert 23mmHg to atm.
0.03026 0.303 0.030 None of these All of these

4. How many neutrons in carbon-13?
13 0 1 7 6

5. Which of these has a negligible mass?
Protons Neutrons Electrons Atoms None of these

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