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Questions and Answers
Which statement correctly describes the atomic number?
Which statement correctly describes the atomic number?
- A mole contains as many particles as there are protons in a carbon-12 atom. (correct)
- The atomic number is equal to the molar mass (in molar mass units).
- The number of protons in one mole of carbon-12 atoms is equal to Avogadro’s number.
- The atomic number is equal to the atomic mass (in atomic mass units).
Which statement correctly describes the atomic mass unit?
Which statement correctly describes the atomic mass unit?
- The atomic mass unit is equal to 1/12 of the mass of a carbon-12 atom. (correct)
- A mole contains as many particles as there are protons in a carbon-12 atom.
- The atomic number is equal to the atomic mass (in atomic mass units).
- The atomic number is equal to the molar mass (in molar mass units).
Which statement correctly describes the molar mass?
Which statement correctly describes the molar mass?
- The number of protons in one mole of carbon-12 atoms is equal to Avogadro’s number.
- A mole contains as many particles as there are protons in a carbon-12 atom.
- The atomic number is equal to the molar mass (in molar mass units).
- The atomic number is equal to the atomic mass (in atomic mass units). (correct)
Samuel's average speed is 20 km/h. How long does it take Samuel to cycle 10 km?
Samuel's average speed is 20 km/h. How long does it take Samuel to cycle 10 km?
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If Samuel applies a force of 40 N on his bicycle, what will be his average power if his average speed remains constant?
If Samuel applies a force of 40 N on his bicycle, what will be his average power if his average speed remains constant?
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If Samuel increases his average power to 300 W, how will this affect his average speed if the force remains constant?
If Samuel increases his average power to 300 W, how will this affect his average speed if the force remains constant?
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