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NEETChemistrySome Basic Concepts of Chemistry

Question 1: Which of the following statements about the mole concept are true? 1. A mole of any substance contains exactly (6.022 10²³ ) particles. 2. The molar mass of an element is numerically equal to its atomic mass in grams. 3. A mole of a gas at STP occupies 22.4 liters. 4. The mole is only used for measuring solids.

Options

  1. A1 and 2 only
  2. B1,2, and 3 only
  3. C2 and 4 only
  4. DAll of the above

Correct answer

B. 1,2, and 3 only

Step-by-step solution

Analysis of Each Statement: 1. True: A mole of any substance indeed contains exactly (6.022 10²³ ) particles, known as Avogadro's number. 2. True: The molar mass of an element (in grams per mole) is numerically equal to its atomic mass (in atomic mass units) for that element. 3. True: At standard temperature and pressure (STP), one mole of any ideal gas occupies 22.4 liters. 4. False: The mole is not limited to measuring solids; it is also used for measuring liquids and gases. Conclusion: - Statements 1,2, and 3 ar

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