JKSSB Mock Tests

The approximate number of water molecules present in 9 gm of water is .

A. 6.022 ×1023
B. 6.022 × 1022
C. 3.011 ×1023
D. 9.023 ×1023
Answer: Option C
Solution (By JKSSB Mock Tests Team)
The molar mass of water is 18 g/mol, meaning a 9-gram sample represents exactly half a mole. According to Avogadro's historical constant, half a mole physically contains roughly 3.011 × 10^23 discrete molecules.
This Question Belongs to: General science Chemistry set 1
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