Chem assignment 4

Name __________________________

Module 4

Post-Lab Assignment

Short Answer (30 points)

Answer the following questions based on material covered in this module. (5 points each)

(You must use complete sentences when answering each question.

1-point deduction per question not answered in complete sentences.)

1) The two trials involved different volumes of water. Are your two densities significantly different? Is this as you expected? Why or why not? Explain.

2) Do you think the density of a liquid would increase or decrease when the temperature goes up? Explain.

3) Do you and your classmates’ marbles results have good precision? Explain.

4) Do you and your classmates’ marbles results have good accuracy? Explain.

5) Using the average density, calculate the mass of 8 marbles, which has a total volume of 16.0 cm3. Show your calculation setup carefully, including units. (Hint: First give the equation that relates density with mass and volume of a sample.)

6) Explain fully why Archimedes’ Principle would not apply for finding the volume of a cork (such as a cork taken from a bottle of wine).