A dalton is a unit used to express which of the following quantities?

• A. Atomic mass
• B. Temperature
• C. Volume
• D. Concentration

Answer: (A)

Verified step by step guidance

1. Understand that a dalton (Da) is a unit commonly used in chemistry and biochemistry to express the mass of atoms and molecules.
2. Recall that atomic mass refers to the mass of a single atom, typically measured in atomic mass units (amu), which is equivalent to daltons.
3. Recognize that temperature is measured in units such as Celsius, Kelvin, or Fahrenheit, not daltons.
4. Know that volume is measured in units like liters or cubic meters, and concentration is measured in moles per liter or similar units, neither of which use daltons.
5. Conclude that the dalton is specifically used to express atomic mass, making 'Atomic mass' the correct choice.