Which unit is the SI base unit for amount of substance?

### Why this is right The mole (mol) is the SI base unit for amount of substance. It is one of the seven base units listed in the material. ### The concept The other units in the options also belong to the SI base-unit list, but each measures a different quantity. Ampere measures electric current, candela measures luminous intensity, and kelvin measures temperature. ### The other options - **A. Ampere (A)**: measures electric current, not amount of substance. - **C. Candela (cd)**: measures luminous intensity, not amount of substance. - **D. Kelvin (K)**: measures temperature, not amount of substance. ### Terms - **Mole (mol)**: the SI base unit for amount of substance. - **Ampere (A)**: the SI base unit for electric current. - **Candela (cd)**: the SI base unit for luminous intensity. - **Kelvin (K)**: the SI base unit for temperature. ### Remember The mole measures amount of substance; it is not a unit of mass.