Taking into account the definition of avogadro's number, in 7.54×10¹⁰ moles of water are 4.54×10³⁴ molecules of water.
Definition of Avogadro's Number
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of moles of H₂O
You can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of water, then 4.54×10³⁴ molecules are contained in how many moles of water?
amount of moles of water= (4.54×10³⁴ molecules × 1 mole)÷ 6.023×10²³ molecules
amount of moles of water= 7.54×10¹⁰ moles
Finally, in 7.54×10¹⁰ moles of water are 4.54×10³⁴ molecules of water.
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