Imagine you are a guest speaker at a kindergarten class

PRE-LAB QUESTIONS

1. Imagine you are a guest speaker at a kindergarten class, and you are asked to explain Avogadro’s number. What would you say and why?

2. Use the space below to draw a diagram explaining the relationship between atoms, moles, and molecules.

3. Why is Avogadro’s number referred to as a mole? If you could change this terminology, what would you change it to and why?

EXPERIMENT 1: PERCENT SUGAR IN BUBBLE GUM

Data Sheet

Table 2: Sugar (Sucrose) Data Mass of unchewed gum (g) Mass of chewed gum (g) Mass of sugar (g) Percent of sugar in gum Post-Lab Questions

1. What is the percent sugar? Show your calculations.

2. What is the molar mass of sugar (sucrose, C12H22O11)? Show your calculations.

3. Convert the mass of dissolved sugar to moles. Show your calculations.

4. Convert the moles of sugar to molecules of sugar. Show your calculations.

5. Imagine that you used four pieces of gum instead of two. Calculate the number of moles. Show your calculations.

6. How does the mass of the saliva alter the experimental data?