hello adnan,

As we know that for a molecule, molecular weight in grams is equal to the Avogadro number and for transforming between moles and grams, we could use the molar mass of the substance. Avogadro’s number can be expressed as the number of elementary particles such as molecules, atoms, compounds, etc. per mole of a substance and Avogadro number is often denoted as NA.

18 mole of water will contain 18×6.023×1023 number of molecules.

therefore the number of water molecules is maximum in 18 moles of water.

hope this will help you a  lot.

thank you.

Hii!
Sorry, but your question seems complete. You haven't mentioned the options along with the question. So, please restructure your question and ask again including th options. This will help.us to provide you with the accurate answer, with the explaining of it.
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