Final answer:
To determine the number of sugar molecules in 7.5g of sugar (C12H22O11), you need to convert grams of sugar to moles using the molar mass of sugar and then use Avogadro's number to convert moles to the number of sugar molecules. The result is approximately 1.32 x 10^22 sugar molecules.
Step-by-step explanation:
In order to determine the number of sugar molecules in 7.5g of sugar (C12H22O11), we need to use the concept of moles. A mole is a unit that represents a certain number of particles. In this case, we need to convert grams of sugar to moles using the molar mass of sugar, which is 342.3 g/mol.
First, divide the given mass of sugar (7.5g) by the molar mass of sugar:
7.5g ÷ 342.3 g/mol = 0.0219 mol
Next, use Avogadro's number, which is 6.022 x 1023 particles/mol, to convert moles to the number of sugar molecules:
0.0219 mol x (6.022 x 1023 sugar molecules/mol) = 1.32 x 1022 sugar molecules
Therefore, there are approximately 1.32 x 1022 sugar molecules in 7.5g of sugar.
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