TUTORIAL – Lab: Experiment 3 Practice Question
| Question: For a material to float on the surface of water, the material must have a density less than that of water (1.0 g/mL) and must not react with the water or dissolve in it. A spherical ball has a radius of 0.5000 cm and weighs 2.00 g. Will the ball float or sink when placed in water? (Volume of a sphere = 4/3 π r3) |
Answer:
Volume of a sphere = 4/3 п (0.5000)3 = 0.523598775 cm3
[Keep all the digits at this point because this is an intermediate step.]
Density of the ball = 2 g / 0.523598775 cm3
= 3.82 g / cm3
Density of the ball is greater than the density of water. The ball will sink when placed in the water.
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LAB INSTRUCTORS
OFFICE HOURS
Bob Bower SW3-4092
Mon 1230-1320
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Maria Tirado SW3-4606
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Tues 1330-1420
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Thurs 1130-1220
Jennifer Wolf SW3-4090
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Thurs 1230-1420
Fri 1130-1220
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CHEM 0011 MapleTA unavailable on Friday – Assignment 6 is due Saturday, Feb 27 by 11:59 pm
MapleSoft has announced that they will be performing maintenance on the MapleTA server starting at 6:00 pm this Friday, February 26. Please be aware that, although there will be no visible changes to Maple TA during this maintenance, the Maple TA server may experience service interruptions for up to 5 hours.
As a result, Assignment 6 will be due on Saturday, Feb 27 by 11:59 pm. ... All the answers to the worksheets in preparation for next Thursday's test (Feb 25) are posted on the website.
Go and check your answers and bring your questions to tutorial this week! ... Are you keeping up with doing worksheets and trying practice problems? Remember to keep learning the polyatomic ions until you can name them, right the formulas with their correct charges.
Do the naming worksheet. The answer is in the Scanned Lecture Notes. ... Hi, Class. Are you enjoying your studies? It's been two weeks since school started. Just a summary of what we've done.
1. We finished Unit 2 and started on Unit 3. The lecture notes are posted on the course website under Scanned Lecture Notes.
2. Download the Density worksheet and see if you can solve those problems. The answers are also posted. Make sure you understand the calculations as well as the sig figs on the final answers.
3. Keep doing the Maple TA practice problems. Practice makes perfect!
4. Prelabs 1 and 2 are due this weekend (Sunday).
5. Assignment 1 is due 1 week from today (next Friday).
Consult the Calendar on the course website and don't miss any due dates!
Have a great weekend. ... Welcome back to school!! Stay connected by liking CHEM 0011. ... |
