Calculate the mass of 1.00 times 1024 (a septillion) molecules of water. Express the answer numerically in grams

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1

Calculate the mass of 1.00 times 1024 (a septillion) molecules of water.

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Answer:

  1. water weights 18 gm per mol.
    so mass of given water = 10/6 *18 = 30gm
  2. There are 24x10^23 atoms in 58 gm of butane
    so for 1 gm = 24x10^23/58 = 4.137