Wednesday
July 29, 2015

Posts by Janice


Total # Posts: 267

Chemistry
1) Is chalk a mixture or a compound? 2)We say that reactive metals react with acids to give salt + hydrogen gas.Is it necessary to write "dilute acids"?
April 10, 2009

chem help please
If 720 mL of 0.0165 M aqueous Al3+ and 300 mL of 0.0567 M aqueous Ca2+ are reacted, how many mol of Br- is produced? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s) my answer was .03564 mol of Br will be produced but the real answer is .0340 mol...i do not know ...
April 4, 2009

math
my nephew has a homework assignment on symmetrical shapes and there is only half of the shape drawn i can help him draw the other half but i cannot identify all the names of the shapes
March 31, 2009

math
where can i find pictures of symmetrical shapes so that i can identify the rest of the shape
March 31, 2009

12th grade chemistry
Calculate the number of grams in the following :[149.096 g/mole] 8.55 moles of (NH4)3PO4 IT WOULD BE NICE IF I CAN GET STEP BY STEPS TO GET ANSWER !!!
March 30, 2009

4th grade
I have to answer questions about Parts of a nonfiction book. example:second entry in index Where on line can I find a book that I can look in the entire book.
February 25, 2009

College Econ
The gross national debt initially is equal to $2.5 trillion and the federal government then runs a defict of $100 billion: 1. What is the new level of gross national debt? 2. If 100 percent of this deficit is financed by the sales of securities to the public, what happens to ...
February 16, 2009

Science
As a person moves away from the equator to the poles, his weight increases. Why?
February 15, 2009

ecology
Why do organisms with the widest limits of tolerance, for most factors, will be the widest distributed?
February 15, 2009

Chemistry
Sorry, I still do not understand why metals react more vigorously in acids than in water?
February 4, 2009

Chemistry
1)Are metals more reactive with water or with dilute HCl? Why? 2)Is weighing balance the same as mass balance?
February 4, 2009

Chemistry
Deduce the anion present in the salt. Assume that the reagent is added to simple salt: - Test: - Concentrated sulphuric acid and manganese(IV) oxide were added to the solid. On warming, a gas was evolved. It turned litmus colourless. Is there something wrong with the question?
February 2, 2009

Chemistry-help
Is it correct to say that sulphur dioxide gas will only turn moist blue litmus paper red but will not bleach it?
February 2, 2009

Chemistry-help needed
Concentrated sulphuric acid and manganese(IV) oxide were added to the solid. On warming a gas was evolved which turned litmus colourless. The answer is that Cl2 gas was evolved and chloride ion is present. Can you please explain the reaction that took place?
February 2, 2009

Chemistry
How does the presence of sodium chloride and acidic substances increase the speed of rusting? Will alkaline substances increase the speed of rusting?
February 1, 2009

Chemistry
Why do we store very reactive metals such as potassium and sodium in oil? What kind of oil is it?
January 28, 2009

chemistry
Alloys are harder and stronger than pure metals. I saw this sentence, "Alloys make the metal harder by preventing the layers of atoms from sliding." I think it is more correct to add the word "easily" at the end of the sentence since in an alloy, it is more...
January 25, 2009

chemistry
In the Periodic Table,there are some elements such as Pm (Promethium) and Cm(Curium) that do not have any relative atomic mass. Why is this so?
January 25, 2009

Chemistry
When we test for carbon dioxide gas, we bubble it through limewater and get a white precipitate CaCO3. What is the equation for the reaction? Is it CO2 + Ca(OH)2 --> CaCO3 + H2O
January 24, 2009

Chemistry
In the qualitative test for nitrate anion, the test goes like this: - Add dilute sodium hydroxide, then add a little aluminium powder. Warm. When describing the test, is it acceptable to use the word "mixture" as in "warm the mixture"? thanks.
January 22, 2009

Chemistry
thank you.
January 22, 2009

Chemistry
In the qualitative test for nitrate anion, the test goes like this: - Add dilute sodium hydroxide, then add a little aluminium powder. Warm. Why do we need to warm the mixture?
January 22, 2009

adult education
If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if Sam, Lisa, and Tom worked together to complete it?
January 21, 2009

Chemisty
The relative electric charge of a proton is +1, the relative electric charge of an electron is -1 and that of neutron is 0. What is electric charge and why is it relative? Thank a lot.
January 20, 2009

Chemistry-please help
The relative mass of a proton is 1 and the relative mass of a neutron is 1. 1)Why do we use the term "relative mass" instead of mass? Is it because the mass of a proton is compared to the mass of a carbon-12 atom? 2) Can we say that the relative mass of an atom is 2...
January 20, 2009

5th grade
What is 25/125 in simplist form?
October 27, 2008

Economice
What is a particular economic concern of Tuvalu; and what is the relationship between Tuvalu and the economy?
October 9, 2008

Economice
What are the needs of a country with a particular economic concern, such as population, unemployment, etc? What is the relationship between the variable that you selected and the economy? What trends do you see in the data sets? Support your assertions of trends with ...
October 9, 2008

Economics
Is it possible for a small firm with a low concentration ratio to thrive and profit in an industry?
October 8, 2008

Economics
Suppose you have an industry with 20 firms and the concentration ratio is 20%. How would you describe this industry?
October 7, 2008

Algebra
I am so lost can someone please help me Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour and train B is traveling at 100 miles per hour. Train A passes a station at 11:15am. If train B passes the same station at ...
July 9, 2008

grammar
could you explain the difference of seen and saw.Thankyou.
April 14, 2008

french
actually for "where do they go" i was referring to the words hier and hier soir. Thanks. I have PC windows.
April 12, 2008

french
Another question on word order... for like hier soir, or hier, where do they go? Can I say... Hier soir, je suis allee au cinema. -is this correct? Cause on a test, I put it this way. or does it have to be at the end of the sentence? Je suis allee au cinema hier soir. P.S. How...
April 12, 2008

french
Where you usually eat? Ou tu manges d'habitude? I was wondering for asking the question, where the d'habitude goes? End of sentence? And for answering... Je manges au restaurant d'habitude. or D'habitude, je manges au restaurant. or Je manges d'habitude au ...
April 10, 2008

french
second question: Is "I want to go to France"....Je veux aller en France. ?
April 8, 2008

french
If i want to say "Is the professors are reasonable or difficult?" is it "les professeures sont raisonnables ou difficiles?" or "les professeures sont-ils raisonnables ou difficiles?" Which one is correct? Do you have to include sont-ils? Is it ...
April 8, 2008

french
How do you say I am hungry in the morning? Is it, J'ai faim du matin.
April 7, 2008

french
When I want to say this monday, can i say ce lundi? or does it have to be le lundi?
April 7, 2008

french
thanks a lot for your help.
April 3, 2008

french
Passe compose again, last time SraJMcGin, you give me 4 situations where Past particples agree in gender and number, I get that part, I want to ask for verbs that need to agree, do you always just add e or s (feminine and plural) no matter what the verb's ending is? Like ...
April 3, 2008

french
Passe compose: (Please forgive my accent marks) i know the past participle agrees with the subject, my text only have example for aller...je suis alle(e)...tu es alle(e)...nous sommes alle(e)s. But i am not sure for other verbs like descendre and partir... will it be je suis ...
April 2, 2008

French
How do you say "On my birthday...", is it "En mon anniversaire"? If i want to say "For dessert...", is it "Pour dessert..." or "Pour le dessert...", with or without the article?
March 28, 2008

Ethics repost
What level of CSR (corporate social responsibility) does the religion Judaism fit into? Ms. Sue answered... How can you fit a religion into a CSR level? Judaism is a highly ethical religion. Me again... How can you fit religion into a CSR? I guess I want to know from their ...
March 15, 2008

Ethics
How can you fit religion into a CSR? I guess I want to know from their practices what level do they fit in. Do their actions only concern about money (minimalist) or do they care about the enviroment, the future generations etc. (stewardship) Then, would you fit it into the ...
March 13, 2008

Ethics
What level of CSR (corporate social responsibility) does the religion Judaism fit into?
March 13, 2008

Algebra
Simplify by removing factors of 1. m^2 - 9/(m+3)^2
March 9, 2008

Chemistry
Since gases can be highly compressed, what must be true of the spaces between the molecules of the gas?
February 23, 2008

criminal justice
Iam looking for How do cameras in the courts arouse controversy about the right of privacy?
February 10, 2008

criminal justice
This is for my home work i go to school on line
February 10, 2008

business
I need some ideas on how General Motors can gain market share, what are some of the recommandations for them. Thanks.
October 18, 2007

CHEMISTRY
4NH3 + 7O2 = 4NO2 + 6H2O HHOW MANY MOLES OF AMMONIA WILL BE REQUIRED TO PRODUCE 10.0 MOLES OF WATER? The equation tells you 4 mols NH3 will produce 6 mols H2O. Can you set up a proportion to make that work? For example, 2 mols NH3 would produce 3 mols H2O and 8 mols NH3 would ...
July 17, 2007

Chemistry
how many psi are in an atm? 14.7 lbs/in2 = 1 atm. An easy way to have your conversions checked is to go to www.google.com and type in, for example, 1 atmosphere to pounds per square inch and hit the go button.
July 17, 2007

algebra
if a+b=1 and a squared + b squared=2 what does a to the 3rd + b to the 3rd equal? If b is 1, b cubed is one. That would work for the first half, but doesn't extend to a to the 3rd+b to the 3rd and what weould 2 squard be? Thank you so much for helping Are you saying: if a+...
May 13, 2007

math
if a=b=1 and a^+b^=2, then what does a cubed +b cubed equal??? ok I don't know if "ok" means that you answered your own question. If both a and b = 1, any power of either a or b will still be 1. I hope this helps. Thanks for asking.
May 13, 2007

physics
a) In raising a 4800 N piano with a pulley system, the workers note that for every 2 m of rope pulled down, the piano rises 0.3 m. Ideally, how much force is required to lift the piano? (b) If the workers actually pull with 2500 N of force to lift the piano, what is the ...
February 8, 2007

AP Chemistry
The normal boiling points of CO and SO2 are -192 degrees C and -10 degrees C, respectively A) At 25 degrees C and 1 atm, which gas would you expect to have a molar volume closest to the ideal value? B) If you reduce the deviation from ideal gas behavior, in what direction ...
January 4, 2007

math factors
I need all math factors for 2,006 2006 = 2*17*59 :)
November 30, 2006

Probability
A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potentail customer making a purchase is 0.10. a) What is the probability the salesperson will make at least two sales in a day? -Do you use binomial formula for ...
November 23, 2006

Probability
A department store has determined that 25% of all their sales are credit sales. A random sample of 75 sales is selected and the proportion of credit sales in the sample is computed. a) What is the probability that the same proportion will be greater than 0.34? In a random ...
November 23, 2006

Calculus
For what values of p>0 does the series Riemann Sum [n=1 to infinity] 1/ [n(ln n) (ln(ln n))^p] converge and for what values does it diverge? You need to let the summation start at n = 3 to avoid the singularity at n = 1 (although you can formally take denominator to b ...
November 13, 2006

Series
For what values of p>0 does the series a) Riemann Sum [n=1 to infinity] 1/ [n(ln n)^p] converge and for what values does it diverge?
November 11, 2006

ethics
What is the future of Asian diversity in America That's a very broad topic since Asia includes people from such diverse countries as Korea, China, India, Pakistan, Kazakhstan, Russia, Israel, and Saudi Arabia. By the second or third generation, immigrants tend to be ...
November 10, 2006

Substitution Method in Algebra!HELP PLZ!
8m+n=3
November 5, 2006

Science
A sliver bar 0.125 meter long is subjected to a temperature change from 200C to 100C.What will the length of the bar after the temperature change? See the aluminum question. I will be happy to critique your work and thinking. A silver bar 0.125 meter long is subjected to a ...
July 31, 2005

Science
What is the length of an aluminum rod at 65 C if its length at 15 C is 1.2 meters? I will be happy to critique your thinking. New length= oldlength(1+alpha*(65-15)) where alpha is the coefficent of linear expansion of aluminum 1.201386 meters
July 31, 2005

Science
How much heat energy is required to raise the temperature of 5Kilograms of a coal from 20 C to 220 C ? Coal? Doesnt coal decompose before 220C> 1,314,718 j is the correct answer to this question, I just finished a test with that same qustion on it.
July 31, 2005

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