Chemistry
Grade-9
Easy

Question

The number of moles in a pure substance is represented as

  1. straight n over straight N subscript straight A
  2. straight N subscript straight A over straight n
  3. straight N over straight n
  4. straight N over straight N subscript straight A

hintHint:

n = N/NA

The correct answer is: straight N over straight N subscript straight A


    We consider,
    N is the total number of elementary entities in the sample.
    NA is the Avogadro's constant.

    The number of moles in a pure substance is represented as n = N/NA, n is the number of moles of the substance.

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