What is the total number of atoms in two water molecules?
Answer and explanation
Correct answer: Six
The molecular formula of water is H₂O. The subscript 2 means that each water molecule contains two hydrogen atoms, and the absence of a subscript after oxygen means one oxygen atom. Thus one molecule contains 2 + 1 = 3 atoms. For two molecules, the total is 2 × 3 = 6 atoms, so option B is correct. The number four would not account for the oxygen atoms properly.
Frequently asked questions
What is the correct answer to this question?
Six
Why is this the correct answer?
The molecular formula of water is H₂O. The subscript 2 means that each water molecule contains two hydrogen atoms, and the absence of a subscript after oxygen means one oxygen atom. Thus one molecule contains 2 + 1 = 3 atoms. For two molecules, the total is 2 × 3 = 6 atoms, so option B is correct. The number four would not account for the oxygen atoms properly.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
