I am assuming you are talking about question # 2, I would use practice problem 7-12 as a guide, take your percentage for O and S and divide them by their own atomic mass that you find in the back of the book, once you have that take the lowest answer and dive them by that, of course when you divide the lowest one by their own it will be 1, like in the example Sulfer had the lowest answer so they divided all if them by that number. Once you have done that the answer that you gets tells you how many moles are in each, like the practice problem Na answer was 1.99, so when you round off it is 2, so if is Na2, oxygen was 1 and Sulfer was 4 and the empirical formula is Na2SO4. I hope this helps if not let me know, just follow the practice problem using the atomic mass and you should find the answer.
Hi I'm from Lp1. I'm in Chem.2 and Lesson 6. On the lab,Model Chemlab, I recieved it back incomplete. I needed the graph to show the equivalence point. It asked you to copy and paste. I did but all I got was the picture of my 100ml Erlenmeyer Flask and 50ml buret. How do I get the graph?
After you add the pH meter, make sure to right-click on the flask and click on "collect titration data". Then, go to the procedures tab at the top of the screen and click on "view titration data". This way you can see the graph forming while you are titrating. When you're done, click on "Edit ---> copy" in the window where the graph is located. Then, put your cursor where the graph is supposed to be placed, and click "Edit ---> paste". Let me know if you have any more questions.
Hello Josh, I don't have the lesson plan in front of me (at home) so I am not sure what chart you are talking about. If it is in you chem book as well can you tell me the page number if not when I go to the classroom tomorrow (Monday) I will look at it and send you another response. :) Ms. Watson
Hello Josh, I don't have the lesson plan in front of me (at home) so I am not sure what chart you are talking about. If it is in you chem book as well can you tell me the page number if not when I go to the classroom tomorrow (Monday) I will look at it and send you another response. :) Ms. Watson
Hello, I am working on Chemistry, semester 2: Lesson 3. I am having trouble with the graphic organizers in 'Homework 14-3, 14-4, 14-5' I am reading the corresponding pages in the chem book over and over, but I still can't determine exactlly how to figure out if a compound it a strong or weak electrolyte.
On the next organizer, I can't even begin to find the molal concentration. Please help, Thanks
For Chem 2 Lesson 3, use the chart on page 427 to help you figure out strong and weak electrolytes. Usually, soluble compounds are strong electrolytes, and insoluble are weak.
To calculate molal concentration, just divide: (f.p of solution - f.p of pure solvent)/(molal-freezing-point constant)
For the "conjugate base/acid", and the "shifting equilibrium" lessons, it is probably best to ask the science teacher that is assigned to your site. Those are concepts that are easier to understand if you ask for help in-person because they are pretty involved. Let me know if you have any more questions. Thanks.
For Mercedes, Section question #2 on page 42 is asking you to look at the units and tell them basically what they represent, like (g) or grams represents weight. (s) or seconds represent time...etc kg/m cubed is a weight over volume that represents density.
Anonymous: You will need to meet with your assigned science teacher because you can't really explain all the rules of writing formulas on a blog, this must be done in person.
For Shawnee, I am assuming this is Shawnee from Loma Portal Mrs Piachuck's student? I believe this is old right because we went over this the last time I was there. Let me know.
Hi Mrs. B first of all thanks for answering my last question , The question I needed help on was section review p.85 # 2 for ex: sodium 23, how would i determine the numbers of electrons , protons , and nuetrons.
im doing chemistry 2, lesson 3, doing the 18-2 worksheet, and am on problem 5)b. im not getting which side the temperature increase will be on because i don't understand the part of the chapter. can someone help me please?
Since Carbon is in period 2, group 14; the number of valence electrons is calculated by subtracting 10 from the group #. Since 14-10=4, your electron dot diagram will have 4 dots around the symbol for carbon, C.
29 Comments:
i'm working on lesson 12
i have a question on empirical formulas this is on page 233
the section review question
1:20 PM
I am assuming you are talking about question # 2, I would use practice problem 7-12 as a guide, take your percentage for O and S and divide them by their own atomic mass that you find in the back of the book, once you have that take the lowest answer and dive them by that, of course when you divide the lowest one by their own it will be 1, like in the example Sulfer had the lowest answer so they divided all if them by that number. Once you have done that the answer that you gets tells you how many moles are in each, like the practice problem Na answer was 1.99, so when you round off it is 2, so if is Na2, oxygen was 1 and Sulfer was 4 and the empirical formula is Na2SO4. I hope this helps if not let me know, just follow the practice problem using the atomic mass and you should find the answer.
9:13 PM
k thanks
2:37 PM
Hi I'm from Lp1. I'm in Chem.2 and Lesson 6. On the lab,Model Chemlab, I recieved it back incomplete. I needed the graph to show the equivalence point. It asked you to copy and paste. I did but all I got was the picture of my 100ml Erlenmeyer Flask and 50ml buret. How do I get the graph?
9:25 AM
After you add the pH meter, make sure to right-click on the flask and click on "collect titration data". Then, go to the procedures tab at the top of the screen and click on "view titration data". This way you can see the graph forming while you are titrating. When you're done, click on "Edit ---> copy" in the window where the graph is located. Then, put your cursor where the graph is supposed to be placed, and click "Edit ---> paste". Let me know if you have any more questions.
10:24 PM
Hi Ms. Watson
It's me, Josh Brightmon, from Loma Portal. I am in Chem 2 and am on lesson 3.
I have a question. What steps do I take to complete the chart on page 14-5
12:35 PM
Hello Josh,
I don't have the lesson plan in front of me (at home) so I am not sure what chart you are talking about. If it is in you chem book as well can you tell me the page number if not when I go to the classroom tomorrow (Monday) I will look at it and send you another response. :) Ms. Watson
8:33 PM
Hello Josh,
I don't have the lesson plan in front of me (at home) so I am not sure what chart you are talking about. If it is in you chem book as well can you tell me the page number if not when I go to the classroom tomorrow (Monday) I will look at it and send you another response. :) Ms. Watson
8:33 PM
Hello,
I am working on Chemistry, semester 2: Lesson 3.
I am having trouble with the graphic organizers in 'Homework 14-3, 14-4, 14-5'
I am reading the corresponding pages in the chem book over and over, but I still can't determine exactlly how to figure out if a compound it a strong or weak electrolyte.
On the next organizer, I can't even begin to find the molal concentration.
Please help, Thanks
1:15 PM
Hi..I am working on Lesson 4, Chemistry 2.
I am having trouble with conjugative bases and acids.
If I am given for example
Base: OH- ..how do I determine the conjugate acid,
or
Acid: HCL ..how do I determine the conjugate base?
1:28 PM
I do not understand Lesson 9'Homework 18-2' Chemistry 2. "Shifiting Equilibrium"
I believe the book does a poor job at explaining how to predict the direction of shit.
For example for the equation:
CH3OH(g) + 101 kJ -->Co(g)+2H2(g)
<--
Increasing the [CO] with cause [H2] to____ ?
Where do I begin?
1:44 PM
For Chem 2 Lesson 3, use the chart on page 427 to help you figure out strong and weak electrolytes. Usually, soluble compounds are strong electrolytes, and insoluble are weak.
To calculate molal concentration, just divide: (f.p of solution - f.p of pure solvent)/(molal-freezing-point constant)
11:37 AM
For the "conjugate base/acid", and the "shifting equilibrium" lessons, it is probably best to ask the science teacher that is assigned to your site. Those are concepts that are easier to understand if you ask for help in-person because they are pretty involved. Let me know if you have any more questions. Thanks.
11:42 AM
I am in chemistry 1 lesson 12. how do I write formulas for compunds?
8:45 AM
I am in chem 1 lesson 12.How do I assign oxidation numbers to compounds?
8:51 AM
I'm in Chemistry 1. I'm stuck on lesson 2's section review on page 42.
I don't understand what is being asked of me for # 2.
Please help!
Mercedes Montano
LP-1
2:16 PM
hi its mercedes again just had another guick question,
in chem 1. l.4 practic problems, in the sections. Im having problems trying to apply them
12:27 PM
For Mercedes,
Section question #2 on page 42 is asking you to look at the units and tell them basically what they represent, like (g) or grams represents weight. (s) or seconds represent time...etc kg/m cubed is a weight over volume that represents density.
3:10 PM
I am not sure what question you need help on please be more specific.
Thanks
Ms W
3:12 PM
Anonymous:
You will need to meet with your assigned science teacher because you can't really explain all the rules of writing formulas on a blog, this must be done in person.
3:16 PM
For Shawnee,
I am assuming this is Shawnee from Loma Portal Mrs Piachuck's student? I believe this is old right because we went over this the last time I was there. Let me know.
3:18 PM
Hi Mrs. B first of all thanks for answering my last question , The question I needed help on was section review p.85 # 2 for ex: sodium 23, how would i determine the numbers of electrons , protons , and nuetrons.
9:59 AM
OMG im so sory I thought your name was ms. B my major mistake I will now be calling u by your real name Ms. watson
3:49 PM
hello, I am paul genest from loma portal
I would like some explaination on 2 things(the book's explaination is too confusing)
valence electrons and complete outershell's
thank you very much
4:57 PM
im doing chemistry 2, lesson 3, doing the 18-2 worksheet, and am on problem 5)b. im not getting which side the temperature increase will be on because i don't understand the part of the chapter. can someone help me please?
arif
10:21 AM
Hi,iM HAVIN A LiTTLE TROUBLE WiTH CHEMiSTRY2...WHAT iS THE OUTER ELECTRON ENERGY LEVEL OF A CARBON ATOM..iN AN ELECTRON DOT DIAGRAM
9:21 AM
Since Carbon is in period 2, group 14; the number of valence electrons is calculated by subtracting 10 from the group #. Since 14-10=4, your electron dot diagram will have 4 dots around the symbol for carbon, C.
1:30 PM
Chapter 13 review in the lesson guide, theres a part about making a chart for 80 g of sodium hydroxide. how do i do this?
11:37 AM
Check out Table 13-18 on page 416 as a guide in preparing solutions with desired molal concentrations.
11:12 PM
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