Question

3 formuals of mole concept class 9
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Answer 1

The number of moles of a substance in a given pure sample can be represented by the following formula:

• n = N/NA ...
• Molar mass of a Substance = (Mass of the Substance in grams)/(Number of Moles) ...
• Number of Moles = (Mass of the Sample)/(Molar Mass) ...
• Number of Atoms or Molecules = (Number of Moles)*(6.022*1023)

Answer 2

Answer:

Number of Moles = (Mass of the Sample)/(Molar Mass)

Molar mass of a Substance = (Mass of the Substance in grams)/(Number of Moles)