chemistry lab

Lab 4 Molar Mass CHEM101L

Student Name: Click here to enter text.

Access Code (located on the lid of your lab kit): Click here to enter text.

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? Click here to enter text.

2. Draw a diagram explaining the relationship between atoms, moles, and molecules. Insert your drawing with your handwritten name and access code clearly visible.

3. Why is Avogadro’s number referred to as a mole? Click here to enter text.

Experiment 1: Percent Sugar in Bubble Gum

Lab 4 Molar Mass CHEM101L

Table 1: Sucrose Data

Mass of

weight boat

Mass of weigh

boat + un-

chewed gum

Mass of un-

chewed gum

Mass of

chewed gum Mass of sugar

Percent of

sugar

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Post-Lab Questions

1. What is the percent sugar? Show your calculations. Click here to enter text.

2. What is the molar mass of sugar C12H22O11? Show your calculations. Click here to enter text.

3. Convert the mass of dissolved sugar to moles. Show your calculations. Click here to enter text.

4. Convert the moles of sugar to molecules of sugar. Show your calculations. Click here to enter text.

5. Convert molecules of sugar to grams of sugar. Show your calculations. Click here to enter text.

6. Imagine that you used four pieces of gum instead of two. Calculate the number of moles. Show your calculations. Click here to enter text.

7. How does the mass of the saliva alter the experimental data? Click here to enter text.

8. Insert a photo of your completed lab with your name and access code handwritten in the background.

Lab 4 Molar Mass CHEM101L