Answer sheets

This is last night's homework with answers we used in class today. I know the equations didn't copy. I'm working on it!

Test practice page 1 KEY
Please let me know if these don't work!  I'm trying google documents and I think I like it but it's different. I'll pull up an entire key in class tomorrow.

Atomic Structure and Nuclear Decay TEST

Studying for the test should not be too stressful. We have time to review the test practice page in class before the test! Your classwork shows you know half life problems and nuclear equations pretty well.  If you want more practice on those you can complete the "halfws" for extra credit (see paperclip on 10/24) or just try a problem from the PowerPoint called "Radioactivity and Half Life". (Click on the paperclip on Wed, 10/25).
Need more practice on nuclear equations? Try these multiple choice questions at sciencegeek.net

I'll be adding an oil drop experiment animation to the page later just for the curious.

Mole Day was great!  Thank you for making great cards and sculptures!

TEST EXTRA CREDIT will be converting grams to moles and then atoms like #6 we studied in class today!

Nuclear Power Plant Project

Test grade - Due Oct 12th

This link is to a useful diagram. You could print and work on drawing the diagram later if you needed.

Part two is practicing terms until you can make a good grade on the quizlet test. Your test should have 15 written questions like this one.

Part 3 is a summary and response to an article about nuclear power. My favorite source for science news that is easy to read (about a page and high school reading level) is Science Daily. This link is the nuclear energy news page.
Your article summary and response should each be a paragraph. Please do not write 2 pages. Write a thoughtful paragraph with a main idea. It is okay if my response to the article is different than yours. It should be personal and it is okay to mention emotions as well as intellectual response.

Your handout mentions a graphic organizer option (thinking maps, mind map, charts or whatever works for your article) and you may complete that but make sure it is eye-catching.

The handout also includes a grading rubric you should check out.

Lab Equipment

Choose a Study ModeScatterLearnFlashcards

Study these flash cards | Study chemistry flash cards

Homework Help Gas Collection Problems

Consider the following problem:

A 500 mL sample of oxygen was collected over water at 23°C and 760 torr pressure. What volume will the dry oxygen occupy at 23°C and 760 torr? The vapor pressure of water at 23°C is 21.1 torr.

What are we solving for? V2  

Plan:   1 - Use Dalton's Law to find P02 

                2 - Use Combined Gas Law to solve for V2 

P_TOTAL = P_OXYGEN - P_WATER

P_OXYGEN = 760 torr – 21.1 torr

P_OXYGEN = 738.9 torr 

Given: V₁ = 500 mL          V₂ = ?               (No change in T)

                  P₁ = 738.9 torr         P₂ = 760 torr

V₂ = P₁V₁ T₂       (Temperature can cancel as there is no change.)

                P₂ T₁

   

V₂ = (500 mL) (739 torr) = 486 mL dry O₂

                         (760 torr)

Test Hints

Friday's test will have 25 or so multiple choice, 8-10 problems you have to show work for AND two questions that require written explanations.

Things to do to make sure you are ready for the FRIDAY's test:

• (5 min.) Click on the density of a gas link and follow along.
• (5 min.) Check that you have memorized Avogadro's number, STP values, R and can match units to their quantity (ex. atm is a unit of pressure.)
• (10-20 min) Study terms at quizlet. Take a test.
• (10-45 min) Visit sciencegeek.net and try the phase diagrams and Ideal Gas Law. See the extra practice tab for more if you have time. This is a low risk test like situation (IDEAL WAY TO STUDY!)
• Try the multiple choice Questions for Review. 
• Study practice test 2.

We will discuss phase diagrams and changes between states of matter this week as well as solving problems from about water displacement.  Depending on your success with this material we can add a lab to the mix this week.  On Wednesday we are visiting the computer lab to do some practice test questions.  Please do bring your book and notebook so that you can refer to your notes as you work.

YOUR HARD WORK WILL PAY OFF. Plan some time for homecoming fun but keep some time every day for chemistry. Hard work now will keep paying off as we cover new topics. 

Homework Help

Done your reveiw homework yet?   The relevant links are below.  Remember I need proof that you practiced until you scored a 90% or better on each one you choose. Please choose the KMT link if you missed the questions with the flask pictures.
Calculations of Formula Mass
Formulas: potassium oxide K2O - manganese(v)oxide  MnO2 - sodium fluoride NaF - calcium bromide CaBr2
thulium III oxide - Tm2O3 - calcium nitride Ca3N2 
Formula Mass and Gram/Mole/Volume Conversions
Temperature and Pressure Conversions
Kinetic Molecular Theory

Want to email me with the screen shots? Email Mrs.Chambers  Use the print screen button and then open and email and paste the shot. You can email can review score or see one with lots of shots.

BTW - You can do all your calculations on your calculator for this online practice, but you can't do that test day.  Why not try writing out a couple?