Question

25. Which of the following statements is/are correct i) One mole of H-atoms weighs 2g. ii) 32 g of Oxygen gas contains 6.023 x 1023 atoms iii) 7 mole of sodium ions means 6.023 x 1023 Na+ ions iv) 6. 023 1023 Electrons are equal to 1 mole of electrons.​

Answer 1

Answer:

1)One mole of H-atoms weighs 2g = True

2)32 g of Oxygen gas contains 6.023 x 10^23 atoms = False (because each molecule of oxygen contains 2 atoms of oxygen so the correct answer is

2 x 6.023 x 10^23 atoms)

3)7 mole of sodium ions means 6.023 x 10^23 Na+ ions = False (because 1 mole contains 6.023 x 10^23 ions do 7 moles will contain 7*6.023 x 10^23 ions)

4)6.023*10^23 Electrons are equal to 1 mole of electrons. = True

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