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Question

What is the atomic mass of water? How is this determined?


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Solution

Step 1: Define atomic mass

  • Each element has its own atomic mass.
  • The unit of atomic mass is u(unified mass)

Step 2: The atomic mass of water

  • The formula for water is H2O.
  • The atomic mass of water is 18.01u.

Step 3: Calculation of atomic mass of water

The atomic mass of water can be calculated by taking separate atomic masses of each element (H and O):

=2×AtomicmassofH+AtomicmassofO=1.0079×2+16u=18.0158u18.01u

Therefore, The atomic mass of water is 18.01u.


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