This lab document outlines procedures for students to determine the number of moles and molecules in a mouthful of water and a bite of a cookie. Students will measure the mass of water before and after drinking, and of a cookie before and after taking a bite, then perform calculations to find the number of moles and molecules of each substance consumed based on molar mass. The purpose is to practice and reinforce the mole concept.

1. Name(s): __________________________________________ Date: _____________ Per: __________
Mole Concept Lab
The purpose of this lab is to practice and reinforce the idea of the mole concept. In addition, you will
determine the number of moles and molecules in a mouthful of water and a bite of a cookie.
Part I
Procedure: Fill a paper cup with water (punch) and determine the mass. Drink one mouthful of punch.
Reweigh the paper cup and punch.
Data:
1. Mass of cup and punch initially ____________
2. Mass of cup and punch after drinking a mouthful _____________
3. Mass of punch swallowed ____________
Calculations. Show all work and label your answers!
1. Calculate the molar mass of water (punch = H2O).
2. Calculate the moles of water swallowed.
3. Calculate the molecules of water swallowed.
4. Calculate the volume of water (punch) you swallowed. (density of water =1.0g/mL;d=m/v)
Part II
Procedure:
Weigh a cookie. Take an average bite of the cookie and reweigh it. Now you may eat all the cookie!
Data:
1. Mass of cookie __________
2. Mass of cookie after eating a bite ____________
3. Mass of cookie digested _______________
Calculations: Show all work and label your answers!
1. Calculate the molar mass of the cookie (C6H12O6).
2. Calculate the moles of cookie digested.
3. Calculate the molecules of cookie digested.
4. Calculate the moles of cookie remaining.
5. Calculate the molecules of cookie remaining.
6. How many cookies are in 10 moles of cookie?