Answer :
Answer:
Water has more molecules.
Explanation:
The number of molecules in each compound can be calculated by using the formula,
Number of moles(n) = Mass(M) / Molecular weight of compound(M.wt)
Given,
Mass of Water = 1.25 grams,
Mass of Ethanol = 0.890 grams,
We know calculate the molecular weight of Water and Ethanol
SInce, Molecular formula of water is H₂O.
Atomic mass of Hydrogen = 1
Atomic mass of Oxygen = 16
Therefore Molecular weight of Water = 2(1) + 16 = 18.
SInce, Molecular formula of Ethanol is C₂H₅OH.
Atomic mass of carbon is = 12
Atomic mass of Hydrogen = 1
Atomic mass of Oxygen = 16
Therefore, Molecular weight of Ethanol = 2(12) + 5(1) + (16) + (1) = 46.
Now, number of moles or molecules of water(n) = 1.25/18
By solving we get number of moles or molecules of water (n)= 0.06944 molecules.
Now, number of moles or molecules of Ethanol(n) = 0.890/46
By solving we get number of moles or molecules of Ethanol (n)= 0.06944 molecules. n = 0.01934.
By observation of both 'n' values we can know that water has more molecules.