Question

One mole of NaCl contains 6.023 ??10 molecules of sodium chloride. 58.5 g of NaCl also contains 6.023 ??10 molecules of NaCl.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

If both assertion and reason are true but reason is not the correct explanation of assertion

Answer 2

Molar mass or mass of 1 mole of NaCl $\quad\quad\quad\quad\quad\quad\quad\quad$= 23 + 35.5 = 58.5 g According to mole concept, 1 mole of molecules = Gram molecular mass $\quad\quad\quad\quad\quad\quad\quad\quad$= 6.023 ??10 molecules ? 58.5 g of NaCl also contains 6.023 ??10 molecules of NaCl.