Question

Which of the following correctly represents 360 g of water?
(i) 2 moles of H20
(ii) 20 moles of water
(iii) 6.022 × 1023 molecules of water
(iv) 1.2044×1025 molecules of water

(a) (i) (b) (i) and (iv)
(c) (ii) and (iii) (d) (ii) and (iv)

NCERT Class IX
Sciences - Exemplar Problems

Chapter 3. Atoms and Molecules

Answer 1

a (i) 20 moles of water

Answer 2

Here's your answer...

(b) (i) and (iv)
because... 20 miles of water is 360g and also number of particles in 360g of water is 1.2044 x 10^25

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