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Some Basic Concepts of Chemistry
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10/08/2021 11:05 am
Topic starter
The number of water molecules present in a drop of water (volume 0.0018 mL) density = 18 mL–1 at room temperature is
(a) 1.084 × 1018
(b) 6.023 × 1019
(c) 4.84 × 1017
(d) 6.023 × 1023
1 Answer
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10/08/2021 11:17 am
Answer is: (b) 6.023 × 1019
Explanation:
0.0018 mL = 0.0018 g = 0.0001 mole of water
= 10-4
Number of water molecules
= 6.023 x 1023 x 10-4
= 6.023 × 1019