Thursday
October 23, 2014

Posts by Jordan


Total # Posts: 777

Chemistry. Please help!
That is what I am thinking. Thanks.
December 3, 2008

Chemistry. Please help!
I gave three different answers. Which one looks OK?
December 3, 2008

Chemistry. Please help!
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...
December 3, 2008

Chemistry
So that would give you .39 mol. Which would then give you P = 20.77 atm. I see what you are saying about the numbers in this problem. Unfortunately my teachers often gives problems that seem to have something missing, and I dont know what to do about it. I was also wondering ...
December 2, 2008

Chemistry
Those are all the numbers in the problem. I worked further in the problem and found... (a) 15.9/20.29= 78.54% and for part (b) I found that 20.29g of MgCO3 makes .24mol CO2. So.... Pressure of CO2 = 12.54 atm. Does that seem right?
December 2, 2008

Chemistry
A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g. Assume that only MgCO3 could produce gas CO2 what percent of original sample was magnesium...
December 2, 2008

chemistry Plz help!
To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? I dont even know ...
December 2, 2008

social studies
what challenges did english settlers in north america face?
December 1, 2008

chemistry
I HATE CHEMISTRy
November 23, 2008

Chemistry.
Calculate the mass of CaCO3 that would produce 40 mL at STP. STP means P= 1 atm and T= 0 degrees C. How do I find the mass?
November 22, 2008

Eighth Grade Math
What are two ways to find the answer to 168 times 55 ?
November 19, 2008

Eighth Grade Math
What are two ways to find the answer to 237 times 76 ?
November 19, 2008

Eighth Grade Science
A tube has gas within it whose volume equals 250 liters at a temperature of 300 celsius K . If the pressure of the gas is kept constant, what will the temperature be if the gas volume is increased by 50 liters ?
November 19, 2008

Eighth Grade Science
At 275 celcuis K ,an air filled balloon has a volume of 200 liters . If the pressure of the air remains constant, what will its volume be at 300 celsius K ?
November 19, 2008

Science
A liter(1000cubed)of gas is under a pressure of 80.00cm of mercury . What pressure is needed in order to reduce the original volume of the gas to 600.0cm cubed?
November 19, 2008

Chemistry
Each of four identical tires of a car is filled with a different gas. Gas pressure in each tire is 3.0 atm at 25oC. One tire contains neon, another – argon, the 3rd one has krypton, and the last one has unknown gas. How many molecules are there in each tire? So far, I ...
November 12, 2008

chemistry
For that part I thought that the formula would be NiF2.
November 12, 2008

chemistry
Suppose you live in a different universe where different amount of quantum numbers is required to describe the atomic orbitals. These quantum numbers have the following rules: N principal 1,2,3,…. L orbital =N M magnetic -1. 0. +1 How many orbitals are there all together ...
November 12, 2008

Physcial science
How many joules of heat are required to melt 40kg of ice at 0 degrees celsious?
November 3, 2008

Physical Science
How much current flows in a 12-watt radio connected to a 120-Volt circuit?
November 3, 2008

physical science
How much current flows in a 12-watt radio connected to a 120-Volt circuit?
November 2, 2008

math studies
Put the equation in standard form which would be y=4x+ 12 ^ ^ m a
October 21, 2008

Math
Kelly subtracted 2.3 from 20 and got 17.7. Explain why this is reasonable.
October 19, 2008

accounting
Each stock holder is paid $1,500 in cash dividends. But it doesn't say how many stock holders there are.
October 14, 2008

accounting
Two owners contribute $100,000 in cash and receive 4,000 shares of stocks in the business. What do you debit/credit?
October 14, 2008

3rd grade
grade 1 215 grade 2 186 grade 3 259 how many more were sold bt grade 3 than by grade 2? 73 answer why aren't any of the tens regrouped to subtract the ones?
October 1, 2008

3rd grade math
Explain how you would use a number line to round 148 to the nearest ten.
September 24, 2008

math Third grade
is a number with the most ditis always greater and why/
September 22, 2008

math
hyhkjxstukmxshutjsjyustetujmuemfcuiryk,eukym jmkiyi;p9loirhytyjulo;p8'[0;pyjuh;p9lo8i76jutykli8oiyj
September 22, 2008

math Third grade
Draw a number line. Make sure the following numbers are on your number line; 1,472; 1,560; 1,481
September 22, 2008

reading
write an alphabet poem about something you see and hear around you.
September 18, 2008

math
thank you
September 18, 2008

math
explain why 24005 is greater than 8999
September 18, 2008

Math
1/5
September 18, 2008

3rd grade
an example of an alphabet poem.
September 18, 2008

3rd grade
explain why 1,734 is greater than 175
September 18, 2008

3rd grade
how is 1,734 greater than 175?
September 18, 2008

3rd grade
Explain how to compare 8,563 and 8699
September 18, 2008

math
explain how 8 ten thousands can be equal to 80 thousands
September 17, 2008

History
How did China and Persia come into contact with one another?
September 15, 2008

social studies
what was one result of zheng he's yoyage
September 15, 2008

social studies
why did zheng he's fleet try to reach many new places
September 15, 2008

social studies
what effect did marco polo journey have on others
September 15, 2008

social studies
whatplaces did the silk road connect
September 15, 2008

Social Studies
why did marco polo go to china
September 15, 2008

5th grade
thank you ALisha for answering my question. you just did my homework
September 15, 2008

5th grade
Can you explain what the "Silk Road" is?
September 15, 2008

Math
explain how you would write 423,090,709,000 in word form
September 12, 2008

American History
I have been assigned a paragraph to "decode" of the Declaration of Independence. I am supposed to write it to make it so that it is easily understood and read-able. I'm having a hard time with it though, because I don't know what the actual words mean. It is ...
September 8, 2008

history
who discovered america?
September 3, 2008

ENGLISH
WHICH ONE OF THE FOLLOWING IS BEST SUITED FOR THE TOPIC "MY FIRST DAY AT MY NEW JOB"?
August 7, 2008

english
Which of the following sentence is grammatically correct. A.I really need to lay down. B.Sit it down over there by the window. C.I thought it would be best if I were to rise the curtain. D.The men came today to lay the carpet in the living. Answer:D but shouldn't it be, ...
August 7, 2008

ENGLISH
Which of the following sentences uses apostrophe correctly? A. She enjoyed the movie and told me it's scenery reminded her of her hometown. B.You really ought to take up fly-fishing-- it's a very relaxing hobby. C.This is a fine piece of furniture, and it's merits ...
August 7, 2008

ENGLISH
Which one of the following sentences uses Quotation Marks correctly? A. "Some laws," he intoned,"are made to be broken." B. "Put those books on the shelves, she said Or we'll never be able to locate them again." C. The title of the first ...
August 6, 2008

ENGLISH
In which of the following sentences is the semicolon used correctly? A. There were five items on the kitchen counter; a coffeemaker, a bag of beans, agrinder, a sugar bowl, and a cracked cup. B. At first Icouldn't make out what kind of bird it was,but as I swooped low, I ...
August 6, 2008

ENGLISH
DO YOU SUGGEST THE CORRECT ONE IS A
August 6, 2008

grammar
Do you suggest the answer is D.Send the pacage to Tanya and him.
August 6, 2008

grammar
Which one of the following sentences uses pronouns correctly? A.Please give Paul and I your undivided attention. B.Jacob and me are going to set a meeting date. C.Carol told Silvya and he the good news. D. Send the package to Tanya and him. I think the answer is A.Please give ...
August 6, 2008

English
I think it is D. If I had arrived earlier,I would't have missed the poening act. (It has two parts)
August 6, 2008

english
1.Which one following sentence is puntuated correctly. A.I saw many of my friends,that I had knew from high school. B.Work was especially hard today,Ihad to train someone new to the job C.I often carry a cellphone with me,it helps if someone is trying to reach me. D.If I had ...
August 6, 2008

grammar
I think it is 1. 1.Her sister who is a lawyer in New York City,is coming for the weekend.
August 6, 2008

grammar
which sentece has a retrictive clause? 1.Her sister who is a lawyer in New York City ,is coming for the weekend. 2.The book that Mario wrote turned out to be long,dense and boring. 3.Rhode Island,which is the smallest state, is in Northern U.S. 4.The cost of the carpet is $500...
August 6, 2008

science
what are the trophic levels from a animal food web?
May 17, 2008

algebra
11y+22=33y-11
May 6, 2008

world history
Name one contrast between athens & sparta.
May 1, 2008

Spelling
What does the word gem mean i ahve to use it in a sentence
April 29, 2008

Algebra
20=+or-2 sqrt 3=5
April 25, 2008

math (pre clac)
What do you mean?
April 25, 2008

MATH
What do youm mean?
April 25, 2008

MATH
What do you mean?
April 25, 2008

Math
By take away the numbers.
April 25, 2008

Math
How do I simplify the following problems? Assume that no denominator equals 0. 1) 8y^3+27/2xy-10y+3x-15 2) sqrt16x^2y^4 3) 2+i/1-3i
April 15, 2008

chemistry
How do you tell what dyes are more polar than others?
April 7, 2008

chemistry
why do some M&M dye's travel farther than others when placed in water?
April 7, 2008

math
2.8cm+2.8cm+3cm+3cm 1cm+10meters
March 31, 2008

geometry
how do you find the perimeter of a triangular pyramid
March 30, 2008

math
a set of 20 cards is numbered 1,2,3,... ..20. Suppose you pick a card at random without looking. Find the probability of each event. Write as a fraction in simplest form. P(3 or 13)
March 25, 2008

spanish
i dont know how to answer this question in a complete sentence? Te duermes en una de tus clases?
March 13, 2008

Math
is it 7??
March 5, 2008

essay help
i have to compare the fear of witches in the crucible to the fear of communist in McCarthyism.
March 5, 2008

essay help
whats a really good way to start a conclusion paragraph??
March 5, 2008

Physics
A* B* C* D* square of side 10 cm I tried my best to do the drawing. It is supposed to be a square, but each * is a point. The sides are 10 cm long. The problem asks for you to find the magnitude and the direction of the net gravitational force on mass A due to the other masses.
March 3, 2008

Social Studies
Where could i find out all about the Arawaks and Caribs?
February 18, 2008

home economics
thank you so much
February 12, 2008

home economics
What are the american and canadian food groups?
February 12, 2008

Physics
Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?
February 10, 2008

physical science
the efficientsy of most power plants is______%?
January 16, 2008

Physical science
Unwanted electricity produced by falling water is called...?
January 16, 2008

physical science
elecricity produced by falling water is called....?
January 16, 2008

Physical science
Devices that use semiconducters to produce electricity from solar energy are called?
January 16, 2008

Physical science
Unwanted radioactive products formed during nuclear reactions are called?
January 16, 2008

phyical science.
The type of fossil fuel that forms only from the remains of plants
January 16, 2008

brookview
a simple way of understanding integers
January 5, 2008

brookview
what is a simple way of understanding
January 5, 2008

math
thanks!!!!
December 13, 2007

math
57% of 109 is what #
December 13, 2007

math
73 is 20% of what number
December 13, 2007

math
what number is 32% of 1,000
December 13, 2007

math
40% of what number is 82
December 13, 2007

math
60 is 25% of what number
December 13, 2007

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