To find out the number of water molecules produced simply use Avogadro’s constant, where 1 mol of any compound is equal to 6.02 x 10^23 molecules of the substance.
Multiply 0.815 to this value.
The correct description that holds true for the above question would be B. Atomic number - 29 and Mass Number - 63.
d, one atom of oxygen and two atoms of hydrogen
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