# Posts by Rose

Total # Posts: 1,311

**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)

**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?

**chemistry**

5* 12.01+ 12*1.01= 60.05 g/mol c H 1 mol of C= 60.05g/mol next step?

**chemistry**

how many c atoms are contained in 15.63g of c5h12??

**math**

(b) 1 to 10 what kind of proportion?

**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?

**chemistry**

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

**chemistry**

"empirical formulas" p 889(153e)

**chemistry**

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

**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?

**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?

**science**

after some research, they definetly don't have segmented bodies, i don't 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!

**chemistry**

thanks!!

**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?

**chemistry**

thank you!!

**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

**chemistry**

thank you, very helpful

**chemistry**

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

**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!

**reading**

the answer is (A) Karen is at home during a snowtorm

**chemistry**

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

**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

**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

**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

**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...

**grade 9 english**

Thanks and for symbols can I write jealosy and selfish

**grade 9 english**

Ms. Sue?

**grade 9 english**

pls i really need help

**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

**grade 9 english**

ive found a site with the story, would that help....

**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....

**grade 9 english**

okay but that reference doesnt help answer my first question........ thank u anyways

**grade 9 english**

pls someone help

**grade 9 english**

i need help answering it. i don't understand the story

**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 ...

**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 ...

**math**

96x3

**math 4th grade**

4/12

**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

**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?

**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

**math**

Unit rate 6 eggs in 7 days?

**english**

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

**anatomy**

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

**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?

**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.

**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...

**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

**science**

an iron box immersed in water,kerosene and coconut oil separately.does same force of buoyant force on iron box in all liquids?

**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, ...

**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?

**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.

**Math**

It's from Saxon math right?

**Math**

I don't know it too, sorry.

**Math**

What is 7/5 into a mixed number

**math**

105/5=21 21*2=42 blue 21*3=63 red

**Math**

41.5/5=8.3lb

**Math**

the x axis is horizontal, the y axis is vertical

**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 ...

**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. ...

**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?

**Pre-Algebra**

x+2=3((1/3)x+6)

**math**

A circle is 360 degrees, so divide 72 by 3 then divide 360 by that answer.

**Math**

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

**Math**

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

**math**

No, when you multiply two negatives the answer is positive. Try again.

**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. ...

**Math**

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

**math**

Find the measure of JDB /J / 4x+5 / 2X+10 ------------/-----------B D

**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.

**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.

**math**

38,000 and 42,000

**history**

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

**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 [ ...

**science**

it is c

**geometry**

Cylinder A has a volume of 360 cm2. Cylinder B has a base and height identical to that of Cylinder B, but leans to the right in such a way that its slant length is greater by 4 cm. What is the volume of Cylinder B?

**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?

**fraction maths**

12/13

**math**

Simplify sin 2 theta over 2 cos theta to a single primary trig function

**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: •...

**MATH**

FIND THE AREA OF A RECTANGULAR FROM MEASURING 10 INCHES BY 8 INCHES.

**math**

what is 837 divided by f

**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 ...

**chemistry**

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

**physics**

a marble dropped from rest falls freely until it hits the ground with a speed of 35 meters per second. the time during which the marble is in free fall is approximately

**Literature**

the answer is D4

**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?

**Math**

What multiplies together to make 300cm3 (volume)

**english ap**

how do you find rhetorical devices?

**physics**

astronaut weighs 175Ib. what is his weight in newton?

**physics**

A sack of flour has weight of 19.8N. what is its weight in pounds?

**Math**

Thank you Ms. Sue.

**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.

**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...

**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

**business**

B ($34,820.) This was in a multi-choice quiz, and after I took it, it showed me the correct answer. I may have not gotten it right, but hopefully another struggling student can benefit from this.

**geometry**

the coordinates of point S are given. the midpoing of RS is (6,-10). find the coordinates of point r. s(0,8)

**Math**

thank you so much for your help ! :)

**Math**

sorry, i forgot to say the instructions said "find all possible rational roots"

**Math**

Can someone show me the steps for how to solve: 1.) f(x) = 4x^4 -3x^3 +2x^2 +x-3 2.) f(x) = x^3 - 2x^2 -5x +6 3.) f(x) = -3x^3 -2x^2 + x -1 Thank you so much :)