Chemistry Manual 2012-2013 - Edison State College
Chemistry Manual 2012-2013 - Edison State College
Chemistry Manual 2012-2013 - Edison State College
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Blake Schmidt - Unit 2 Page 15<br />
U2 EP2<br />
Unit 2: Example Problems 2<br />
Mass, Volume and Density<br />
Mass (g)<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
Substance A<br />
Substance B<br />
0 10 20 30 40 50 60 70 80<br />
Volume (mL)<br />
4.<br />
The graph above shows the relationship between mass and volume for two substances.<br />
Use the graph above to answer the following questions.<br />
a.<br />
You have built a simple two-pan balance to<br />
compare the masses of substances A and B. What<br />
would happen to the balance if you put equal<br />
masses of A and B in the two pans? What would<br />
happen if you put equal volumes of A and B in the<br />
two pans? Explain your reasoning.<br />
b.<br />
Write equations for both substances. What does the slope physically represent? What<br />
does it tell you about these substances?<br />
c.<br />
What mass of Substance B would be needed to balance the pans if 10 mL of Substance A<br />
is in one pan? Explain your reasoning.<br />
d.<br />
What volume of Substance A would be needed to balance the pans if 35 mL of Substance<br />
B is in one pan? Explain your reasoning.<br />
e.<br />
f.<br />
Water has a density of 1.00 g/mL. Sketch a line to represent water on the graph above.<br />
Determine whether substance A and B will sink or float when placed in a bucket of water.<br />
A: sink / float B: sink / float (circle correct response)<br />
Defend your answer using the graph, and your outstanding understanding of density.
Change language