Tuesday
October 21, 2014

Posts by ROSE


Total # Posts: 908

chemistry
A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?
February 22, 2013

chemistry
thankks again!!1
February 22, 2013

chemistry
sorry, sent it twicee
February 22, 2013

chemistry
the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?
February 22, 2013

chemistry
the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?
February 22, 2013

Guidance and Discipline
following ideas?
February 22, 2013

chemistry
Thank you soooooooooooo much!!!
February 22, 2013

chemistry
a sample of glucose, c6h12o6 contains 2.03*10^21 atoms of carbon. (a)how many atoms of hydrogen does it contain? (b)how many molecules of glucose does it contain? (c)how many moles of glucose does it contain? (d)what is the mass of this sample in grams? its kinda long, but i ...
February 22, 2013

edu
i think your right, its c
February 22, 2013

chemistry
plug in the molar mass? is mass the same as molar mass?
February 22, 2013

chemistry
how many grams of CO2 can be formed by the complete combustion of a 14.7 sample of C2H6 that is 92.4% pure?( assume the impurities contain no carbon)
February 22, 2013

physics
An aircraft in a straight line with a constant speed of 450km.h ,What is the magnitude of the resultant force acting on the aircraft?
February 22, 2013

chemistry
5* 12.01+ 12*1.01= 60.05 g/mol c H 1 mol of C= 60.05g/mol next step?
February 21, 2013

chemistry
how many c atoms are contained in 15.63g of c5h12??
February 21, 2013

math
(b) 1 to 10 what kind of proportion?
February 21, 2013

chemistry
A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?
February 21, 2013

chemistry
honestly I would love to, but theres no more info or instructions on my worksheet, makes no sense thanks for trying tho:)
February 21, 2013

chemistry
"empirical formulas" p 889(153e)
February 21, 2013

chemistry
umm... i need some help, sorry but how do you convert them?? my chem teacher isnt the best :(
February 21, 2013

chemistry
"empirical formulas" combustion of a 0.255g compound conatining only C,H and O, yields 0.561g CO2 and 0.306g H2O. what is the empirical formula of the compound?
February 21, 2013

chemistry
A 2.50g sample of a hydrate of calcium nitrate was heated, and only 1.70g of the anhydrous salt remained. what is the formula of the hydrate?
February 21, 2013

science
after some research, they definetly dont have segmented bodies, i dont think its shell either, and hollow doenst sound correct, so my answer is round bodies might need to clarify planarians are not parasitic hope this helps!
February 21, 2013

chemistry
thanks!!
February 21, 2013

chemistry
a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?
February 21, 2013

chemistry
thank you!!
February 21, 2013

chemistry
if 125g of magnesium sulfate heptahydrate is completely dehydrated, how many grams of anhydrous salt will remain? i would really appreciate anyone's help
February 21, 2013

chemistry
thank you, very helpful
February 21, 2013

chemistry
what is the formula for the sodium sulfate if 3.54g of dry solid remain after 8.50g of hydrate are heated??
February 21, 2013

science
group 8 elements have full valence electron shells. (valence electron are in the outermost shell of an atom) this makes the elements in group 8 stable or inert. they are also transition metals. hope this helps!
February 21, 2013

chemistry
If 53.62 ml of an oil weighs 48.34 g, what is the specific gravity of the oil?
February 19, 2013

physics
a net force of 5000N accelerates a car from rest to 20m/s in 10s. what is the net force exerted on the car
February 19, 2013

grade 9 english
Are u disagreeing with my answer because it is wrong or is it your opinion???? I want to make sure I get the right answer
February 18, 2013

grade 9 english
Ms Sue I finished all the questions but I really only need help on the question 2b) consider why the mother's laughter sounds like wind chimes when she is talking to the doctor
February 18, 2013

grade 9 english
And for each womans laugh can I say that ms hallmans has almost like an evil laugh and the mothers more of like a fake laugh(like she didn't find it funny, she may have found it offensive) is that right? And I'm still having diffuculties on why the mothers laugh sounds...
February 18, 2013

grade 9 english
Thanks and for symbols can I write jealosy and selfish
February 18, 2013

grade 9 english
Ms. Sue?
February 18, 2013

grade 9 english
pls i really need help
February 18, 2013

grade 9 english
it is available online go to google and type symbols in short story stones by sandra birdsell, press enter and scroll down to find a site called PDF Stones by Sandra Birdsell - My Class Sites and u will find the story
February 18, 2013

grade 9 english
ive found a site with the story, would that help....
February 18, 2013

grade 9 english
im sorry but the reference does not help....... i still do not understand.... is there any way u can read it now(2 pages) and help me pls... im realy stuck....
February 18, 2013

grade 9 english
okay but that reference doesnt help answer my first question........ thank u anyways
February 18, 2013

grade 9 english
pls someone help
February 18, 2013

grade 9 english
i need help answering it. i dont understand the story
February 18, 2013

grade 9 english
questions for short story Stones by sandra birdsell. 1) in two sentences retell the story. 2a) Compare the descriptions of the two woman's laughter in paragraph three. Explain how the similes capture the personalities of each of these characters. 2b) consider why the ...
February 18, 2013

Finance 100
The following information is available to you: travelers' checks = $1 million; coin and paper currency = $30 million; repurchase agreements and Eurodollars = $15 million; demand deposits = $25 million; retail money market mutual funds = $60 million; savings accounts at ...
February 18, 2013

math
96x3
February 13, 2013

math 4th grade
4/12
February 12, 2013

7th grade math
what is the function of the following table: a tree that has a height of 12 feet will have a shadow of 10 feet
January 30, 2013

chem
if a 240mg of an acid H2A required 50.0ml of 0.10M NaOH for complete neutralization, what is yhe equivalent weight of the acid? what is its molecular weight?
January 28, 2013

chem
draw the approximate curve for a 25ml 0.10 M weak acid HA (K=1x10^-6) that is titrated with 0.10 M NaOH
January 28, 2013

math
Unit rate 6 eggs in 7 days?
January 28, 2013

english
i want to know more about the who what where why and how of robert falcon scott and the terra nova expedition
January 24, 2013

anatomy
how many extremities are in the human body?... is it only two with is our upper extremity and lower body?... help!..thanks!
January 24, 2013

mat 140
A football team gained 12 yards on one play, lost 40yards on another, and gained 34 yards on the last play of the first half. They had already gained 345 yards during the half. What was the total yardage gain for the first half?
January 22, 2013

Physics
Two springs are attached side by side to a green box of mass M. Determine an expression that describes the period of motion of the box attached to this combination of springs. The two individual springs have spring constants K1 and K2 respectively.
January 21, 2013

Physics
A 250 g object attached to a spring oscillates on a frictionless horizontal table with the frequency of 4 Hz and an amplitude of 20 cm. Calculate a) maximum potential energy of the system b) the displacement of the object when the potential energy is one-half of the maximum c...
January 21, 2013

Statistics
3 balls are drawn successively from a box containing 6red,4 white and 5 blue balls.Find the probability that they are drawn in order red,white and blue if:(a)each ball is replaced.(b)balls are not replaced
January 20, 2013

science
an iron box immersed in water,kerosene and coconut oil seperately.does same force of buoyant force on iron box in all liquids?
January 17, 2013

GENERAL CHEMESTRY
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion? Provided an in depth explanation or analysis of subject or topic. Used a clear, ...
January 16, 2013

GENERAL CHEMESTRY
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?
January 15, 2013

GENERAL CHEMESTRY
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
January 13, 2013

Math
It's from Saxon math right?
January 9, 2013

Math
I don't know it too, sorry.
January 9, 2013

Math
What is 7/5 into a mixed number
January 8, 2013

math
105/5=21 21*2=42 blue 21*3=63 red
January 7, 2013

Math
41.5/5=8.3lb
January 7, 2013

Math
the x axis is horizontal, the y axis is vertical
January 7, 2013

English-writeteacher
That's what I'm concerned about- it's too confusing. It's meant to be going back and forth between the past and present; the present being the main character in her 60's in the window above the bar in the painting preparing to kill the couple, and the past ...
January 7, 2013

English-writeteacher
Apologies for the re-post but it didn't seem like my last post would be answered. I'm writing a short story for english based on the painting Nighthawks and I would really like some feedback. Any type of feedback would be highly appreciated. I'm kind of stuck. ...
January 7, 2013

Pre-Algebra
Sure. the first step is distributing: x+2=x+18 okay that doesn't make sense are you sure you wrote the question right?
January 7, 2013

Pre-Algebra
x+2=3((1/3)x+6)
January 7, 2013

math
A circle is 360 degrees, so divide 72 by 3 then divide 360 by that answer.
January 7, 2013

Math
You're welcome. Sorry about the double post, my computer is weird 0_0
January 7, 2013

Math
to find the perimeter you add the two measurements and multiply by 2: 2(6m+48m)=
January 7, 2013

math
No, when you multiply two negatives the answer is positive. Try again.
January 7, 2013

English III short story
I'm writing a short story for english based on the painting Nighthawks and I would really like some feedback. I'm kind of stuck. Thanks in advance! The Job They were just names. Just two insignificant names in the little black book, just like all the rest. Targets. ...
January 7, 2013

Math
First distribute the 3: (12x+18), then add 7: 12x+18+7=12x+25
January 7, 2013

math
Find the measure of JDB /J / 4x+5 / 2X+10 ------------/-----------B D
December 27, 2012

Biology- check my answer (diff one)
Well it would have had to been two of them since it's worth two points. C is I think 1.
December 19, 2012

chemistry
A scuba diver's tank contains 0.29kg of O2 compressed into a volume of 2.3L. Calculate the gas pressure at 8 degrees celcius.
December 10, 2012

math
38,000 and 42,000
December 10, 2012

history
compare the status of Europe and the United States after World War I. How were they different financially, politically, and psychologically?
December 9, 2012

statistics
8. Suppose that the IQ score for a person selected from a certain group of people is approximately N(; 100). Let X1;X2; : : : ;Xn be a random sample of such IQ scores. (a) How large should n be so that a 90% con dence interval for  with maximum error " = 1 is [ ...
December 5, 2012

Physics Energy and Work
A 20.0 kg child on skis, initially at rest, slides 2.0 m down an incline at an angle of 20.0 degrees with the horizontal. If there is no friction between incline and skis, what is the kinetic energy of the child at the bottom of the incline?
November 27, 2012

fraction maths
12/13
November 25, 2012

math
Simplify sin 2 theta over 2 cos theta to a single primary trig function
November 22, 2012

Critical Thinking
The idea behind a comparative essay is, quite simply, that you take two or more things or ideas and compare their points of similarity or difference. For your second assignment in the Essay Series, create a comparative essay. In 1-2 pages, compare the following proverbs: •...
October 30, 2012

MATH
FIND THE AREA OF A RECTANGULAR FROM MEASURING 10 INCHES BY 8 INCHES.
October 19, 2012

math
what is 837 divided by f
October 18, 2012

trigonometry
A carpenter is building a house. He is constructing the roof. The roof has an angle of elevation of 40° from the horizontal. The height he wants to make the roof is 18 feet. How far is it from the bottom edge of the roof to the top of the roof? (Find the hypotenuse to the ...
October 18, 2012

chemistry
5.22kg of H2 reacts with 31.5kg of N2, which one is the limiting reactant?
October 18, 2012

Math
Which of the following options has the highest APY: a 6.25% APR compounded yearly, a 6.2% APR compounded monthly, or a 6.1% APR compounded continuously?
October 3, 2012

Math
What multiplies together to make 300cm3 (volume)
September 28, 2012

english ap
how do you find rhetorical devices?
September 27, 2012

physics
astronaut weighs 175Ib. what is his weight in newton?
September 26, 2012

physics
A sack of flour has weight of 19.8N. what is its weight in pounds?
September 26, 2012

Math
Thank you Ms. Sue.
September 24, 2012

Math
9 students in a group found that their mean score was 86 for the first math test. On the next test, each student in the group scored 7 points higher than on the first text. What was their mean score for the two tests? Any help would be appreciated.
September 24, 2012

essay
Imagine that you are hosting a group of exchange students next term. You are responsible for welcoming the students to campus and acquainting the students with life on campus socially as well as academically. Develop a "Welcome Letter" for the visiting students. Keep...
September 21, 2012

accounting
if i invest in municipal bonds that earn 5% interset or in taxable bonds issued by pepsi that pay 11% what is the tax rate at 15% and 30%; and what tax rate would there be indifferent between the bonds
September 15, 2012

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