Question

A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g.

A. Calculate the molar mass of sucrose.

B. Calculate the number of moles of sucrose contained in the sample. Show work.
A. The molar mass of sucrose can be calculated by adding up the atomic masses of all the atoms in one molecule of sucrose:

Molar mass of sucrose = 12(atomic mass of C) + 22(atomic mass of H) + 11(atomic mass of O)
= 12(12.011) + 22(1.008) + 11(15.999)
= 342.296 g/mol

Therefore, the molar mass of sucrose is 342.296 g/mol.

B. The number of moles of sucrose can be calculated using the formula:

moles = mass / molar mass

Substituting the given values into the formula:

moles = 1.202 g / 342.296 g/mol
= 0.00351 mol

Therefore, there are 0.00351 moles of sucrose in the sample.

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