Name __________________________________
Date _________________
SignOff
________
Lab Partners
__________________________________________________________________________
Determining the Number Molecules and Atoms
Part 1: Determining the Number of Molecules
You will be given ten pennies (made up of copper), a piece of chalk (made up of calcium
carbonate), and a small amount of salt. You are to find the number of molecules in each item.
A. Number of Molecules of the ten pennies.
Find the mass of the pennies. ________In
the space
below, calculate the number of molecules in ten pennies. Remember to include the
correct
units.
B. Number of Molecules of a piece of chalk.
Obtain a piece of chalk (calcium carbonate).
Wipe it
free of dust particles and measure its mass. ________ Write a message with the chalk
and find
its new mass. ________ In the space below, calculate the number of molecules
consumed.
Remember to include the correct units.
C. Number of Molecules of Water.
Fill a paper cup with water and measure its mass.
________
Pour a small amount of water out of the cup and find the new mass. ________ In the
space
below, calculate the number of molecules consumed. Remember to include the correct
units.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '08
 Sutcliffe
 Chemistry, Atom, Mole, Foil, Height

Click to edit the document details