Answer:
A molecule of sucrose (C12H22O11) has 12 carbon atoms, 22 hydrogen atoms and 11 oxygen atoms. The subscripts also indicate the ratios of the elements.
Explanation:
This is because it has the abbreviation of the Carbon atoms, Hydrogen atoms, and Oxygen atoms are right before the number.
The number of molecules of sugar is required.
The number of molecules is [tex]2.2\times 10^{23}\ \text{molecules}[/tex]
m = Mass of sugar = 125 g
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Molar mass of sugar
[tex]M=C_{12}H_{22}O_{11}=12\times 12+1\times 22+16\times 11\\\Rightarrow M=342\ \text{g/mol}[/tex]
Number of moles is
[tex]n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{125}{342}\\\Rightarrow n=0.365\ \text{mole}[/tex]
Number of molecules is
[tex]N=N_An\\\Rightarrow N=6.022\times 10^{23}\times 0.365\\\Rightarrow N=2.2\times 10^{23}\ \text{molecules}[/tex]
The number of molecules is [tex]2.2\times 10^{23}\ \text{molecules}[/tex]
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