Question

calculate the number of water molecules and the number of oxygen and hydrogen atoms in a drop of water containing 0.03 mole of water

Answer 1

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• Number of water molecules in 0.03 mol of water = 0.03 x 6.022 x 1023 = 1.8 x 1022 molecules of water.

• 1 H2O molecule contain 1 oxygen atoms.

• Number of water molecules in 0.03 mol of water = 0.03 x 6.022 x 1023 = 1.8 x 1022 molecules of water.

• 1 water molecule(H2O) contain 2 hydrogen atoms.

• So, number of hydrogen atoms in 0.03 mole of water = 2 x 0.03 x 6.022 x 1023 = 3.6 x 1022 atoms of hydrogen

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