Question

calculate the no. of moles of 9 gm of
h2o​

Answer 1

Answer:

Water(H2O) has a molecuar mass of 18, this means it weights 18 g per mole. A mole is 6.0221415*1023molecules (Avogadro's number). If you have 1 g of water, you therefore have 1/18 of a mole, or 3.34*1022 molecules.

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Answer 2

Explanation:

no of moles of water = 9 g / 18 g =1/2 moles

so no of molecules present = no of moles × N(A)

=1/2 × 6.022×10^23

= 3.011×10^23

no of moles = 17/17= 1 mole

no of molecules = 1 × 6.022× 10^23

=6.022×10^23

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