Question

A sample of table sugar (sucrose c12h22o11) has a mass of 3.115 g

A. What is the molar mass of sucrose. Show your work
B. Calculate the number of moles in the sample.

Answer 1

hey there:

a) atomic mass:

Carbon =12.0107 g/mol

Hydrogen = 1.00794 g/mol

Oxygen = 15.9994 g/mol

Therefore:


C12H22O11 =


12 * 12.0107 + 1 * 1.00794 + 16 * 15.9994 => 342.29648 g/mol

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b) number of moles:

n = m / mm

n = 3.115 / 342.29648

n = 0.0091 moles

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hope this helps!