Calculating Sucrose Molecular Mass

The video tutorial explains how to calculate the mass of a single sucrose molecule. It begins by determining the molar mass of sucrose using its chemical formula C12H22O11. The molar mass is calculated by adding the atomic masses of carbon, hydrogen, and oxygen. Once the molar mass is found, it is divided by Avogadro's number to find the mass of one molecule of sucrose. The tutorial emphasizes the importance of using conversion factors to ensure units cancel out correctly, resulting in a final mass of 58.87 x 10^-23 grams for one sucrose molecule.

What is the first step in calculating the mass of a single sucrose molecule?

• Calculate the number of sucrose molecules.

• Measure the density of sucrose.

• Determine the molar mass of sucrose.

• Find the volume of sucrose.

What is the chemical formula for sucrose?

• CH4

• C2H5OH

• C12H22O11

• C6H12O6

How many carbon atoms are present in one molecule of sucrose?

• 6

• 11

• 12

• 22

What is the molar mass of sucrose in grams per mole?

• 180.18

• 342.34

• 58.44

• 98.08

What constant is used to convert molar mass to the mass of a single molecule?

• Gravitational constant

• Avogadro's number

• Boltzmann's constant

• Planck's constant

Why is a conversion factor used in the calculation?

• To increase the molar mass.

• To ensure the units cancel out correctly.

• To change the chemical formula.

• To decrease the number of molecules.

What is the mass of one sucrose molecule in grams?

• 9.81 x 10^-22

• 6.02 x 10^23

• 1.67 x 10^-24

• 58.87 x 10^-23

How can the mass of a sucrose molecule be expressed in scientific notation?

• 5.887 x 10^-22

• 5.887 x 10^-23

• 5.887 x 10^-24

• 5.887 x 10^-25

What is the significance of the small mass value obtained for a sucrose molecule?

• It indicates the molecule is very large.

• It shows the molecule is very small.

• It suggests the molecule is unstable.

• It means the molecule is highly reactive.

What is the final step in calculating the mass of a sucrose molecule?

• Subtract the atomic masses.

• Multiply by Avogadro's number.

• Divide by Avogadro's number.

• Add the atomic masses.