Which of the following SI units is commonly used to measure the amount of substance in chemistry?

• A. ampere
• B. candela
• C. kelvin
• D. mole

Answer: (D)

Verified step by step guidance

1. Understand that the question asks for the SI unit commonly used to measure the amount of substance in chemistry.
2. Recall the seven base SI units: ampere (A) for electric current, candela (cd) for luminous intensity, kelvin (K) for temperature, and mole (mol) for amount of substance.
3. Recognize that the mole is defined as the amount of substance containing exactly \$6.022 \times 10^{23}$ elementary entities (Avogadro's number).
4. Note that ampere, candela, and kelvin measure different physical quantities unrelated to the amount of substance.
5. Conclude that the mole (mol) is the correct SI unit used to measure the amount of substance in chemistry.