014 • Name:

$\text{slope m}=\frac{(\mathrm{y2}-\mathrm{y1})}{(\mathrm{x2}-\mathrm{x1})}$
Volume V = length l × width w × height h
mass m = density ρ × Volume V
$\rho =\frac{m}{V}$

1. The graph shows soap density data. Use the graphed data to answer the following questions.
   1. __________ _____ Calculate the density ρ of Dial Basic soap (include units!).
   2. ______________ Based on the density, will Dial Basic soap float or sink?
   3. __________ _____ Using the density above, calculate the mass of a bar of Dial Basic soap that has a volume of 100 cm³.
   4. __________ _____ Using the density above, calculate the volume of a bar of Dial Basic soap that has a mass of 250 grams.
   5. __________ _____ Calculate the density ρ of Ivory soap.
   6. ______________ Based on the density, will Ivory soap float or sink?
   7. In the 8:00 laboratory section every group that measured Ivory soap obtained a density greater than one based their slope. Yet the Ivory soap was shown to float. Which are they more likely to have measured incorrectly and explain WHY: the volume or the mass?
2. As seen in the image, three identical vials have equal amounts of a green liquid. In terms of density, why are two floating and one has sunk to the bottom?
3. ______________ In grams per cubic centimeter, what is the density of water?
4. Spring 2013 I was puzzled by a bar of blue Lux Wake Me Up soap. I gathered data and made the chart shown based on the data. The slope was 0.9853 g/cm³. When placed in water the soap sank.
   1. What was unexpected about this result?
      
   2. Explain why this might have happened.