Question
Download Solution PDFThe SI unit for the amount of substance is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
SI Unit for the Amount of Substance
- The International System of Units (SI) provides a standard set of units for measurements used worldwide. It ensures consistency and uniformity in scientific communication and calculations.
- The SI unit for the amount of substance is called the "mole (mol)".
- A mole is defined as the amount of substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 isotope. This number is known as the Avogadro constant, approximately equal to 6.022 × 1023.
EXPLANATION:
- Kilogram—This is the SI unit of mass.
- Gram - This is not an SI unit but a derived unit for mass.
- Mole - This is the correct SI unit for the amount of substance.
- Candela - This is the SI unit for luminous intensity.
- Therefore, the correct answer is Option 3: Mole.
Hence, the SI unit for the amount of substance is the mole (mol).
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