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How many atoms are present in total in two water molecules?

Answer and explanation

Correct answer: 6

The chemical formula of water is \(H_2O\). One water molecule has 2 hydrogen atoms and 1 oxygen atom, so it contains 3 atoms in total. Therefore, two water molecules contain \(2 \times (2+1)=6\) atoms. Option 5 is incorrect because it does not represent the total number of hydrogen and oxygen atoms in two complete water molecules.

Related tags

ScienceClass 10Chemical ReactionsChemical FormulaWater MoleculeAtom Counting

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