Question

How many moles are contained in each number of grams of table sugar (c12h22o11, molar mass 342.3 g/mol)?

A) 1 moles
B) 10 moles
C) 5 moles
D) 15 moles

Answer 1

To calculate the number of moles of sucrose in a 25 g sample, divide the mass of the sample by the molar mass of sucrose (342.3 g/mol), resulting in approximately 0.07305 moles.

Step-by-step explanation:

The question asks about calculating the number of moles of sucrose (C₁₂H₂₂O₁₁) in a given mass of the compound, using its molar mass. To find the number of moles in a sample, you would divide the mass of the sample by the molar mass of the compound. Sucrose has a molar mass of 342.3 g/mol. Therefore, for a 25 g sample of sucrose:

1. Divide the given mass of the sucrose sample by its molar mass: number of moles = mass of sucrose / molar mass of sucrose.
2. Calculate the moles: number of moles = 25 g / 342.3 g/mol = 0.07305 mol.

This is a rough estimate and for exact calculations, you should use more precise figures.