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Sara

Questions and answers by visitors named Sara

Questions (2,119)

A circle is divided into 8 equal parts. What is the total angle measure of 4 parts?
1. 14 answers
2. asked by Sara
3. 3,578 views
A search and rescue aircraft, travelling at a speed of 240 km/h starts out at a heading of N 20 degrees West. After travelling
1. 3 answers
2. 1,661 views
An airplane is heading due east with an airspeed of 220km/h when it encounters a wind from the south at 76km/h. What is the
1. 5 answers
2. 2,001 views
if 3 1/2 bags of seed cost $35, what will 4 1/2 bags cost?
1. 5 answers
2. 2,998 views
A solution of 2.50 g of a compound having the empirical formula C6H5P in 25.0 g of benzene(C6H6) is observed to freeze at 4.3
1. 4 answers
2. 4,882 views
Casey will put 3 plants in a pot. She is picking from 5 different plants in the store. How many possible ways could she pick the
1. 3 answers
2. 567 views
The two pickpockets:There was once a young man who was the best pickpocket around. So he decided to try his luck in the big
1. 7 answers
2. asked by Sara
3. 5,388 views
Calculate the molarity and the molality of an NH3 solution made up of 30 g of NH3 in 70 g of water. The density of the solution
1. 7 answers
2. 6,455 views
For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10^−5 at 25◦C. After analysis, it is determined
1. 5 answers
2. 1,883 views
Remove one value from the following data to make each statement true.32,45,82,99,15,102,75,15,15,75,2,75 a)The mean is 56.09 How
1. 6 answers
2. 1,897 views
Determine the vector equation of a plane that contains the line with symmetric equation (x+3)/-2=(y+1)/5=(z+2)/4 and the point
1. 4 answers
2. 1,758 views
A mixture containing 11.9 g of calcium fluoride and 10.3 g of sulfuric acid is heated to drive off hydrogen fluorid. Given the
1. 4 answers
2. 620 views
Which of the following substances shown should the standard heat of formation (\DeltaΔHfo be zero at 25oCGaPO4 (aq) As (l) Ar
1. 4 answers
2. 620 views
Two coins are tossed and a tetrahedral die is thrown. The tetrahedral die has 4 faces numbered 1, 2, 3, 4.(ii)Work out the
1. 4 answers
2. 484 views
Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction:2SO2(g)+O2--> 2SO3
1. 4 answers
2. 7,447 views
Which of the following geological changes are physical changes and which are chemical changes?a)formation of a limestone cave
1. 3 answers
2. 1,191 views
A student has blocks of four different materials of identical mass. The materials are ice, gold, aluminum, and Styrofoam. Which
1. 4 answers
2. 1,009 views
Assume that the export price of a Nissan XTerra from Osaka, Japan is ¥3,750,000. The exchange rate is ¥121.84/$. The forecast
1. 4 answers
2. 2,521 views
The complex [Co(ox)3]4- has a high-spin electron configuration. How many unpaired electrons are there in the complex?I know
1. 7 answers
2. 3,888 views
Round to nearest ten thousandth:4.803621
1. 5 answers
2. 3,460 views
The compound M2X3 has a molar solubility of 0.0190 M. What is the value of Ksp for M2X3?Here are the choices: 1. 3.52 × 10^-6
1. 4 answers
2. 2,712 views
Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0
1. 4 answers
2. 751 views
a certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, is
1. 4 answers
2. 2,330 views
For the question "Determine the equation of the tangent to the curve y = xtanx at the point with x-coordinate π." how is the
1. 3 answers
2. 1,350 views
A buffered solution was created by mixing solutions of NH4Cl and NH3 at 25 C. Which species, NH4+ or NH3, has the highest
1. 4 answers
2. 2,446 views
Susan pulls on a rope sleigh with a force of 120 N. If the rope makes an angle of 25 degrees with the horizontal, what is the
1. 5 answers
2. 2,833 views
Story : The Ethanol DebateNatalie Stewart What feature of the selection BEST illustrates that it is a persuasive essay? A) < --
1. 5 answers
2. 5,196 views
Which is an argument against free trade?It increases the prices for many products. It violates basic economic principles. It
1. 5 answers
2. 931 views
Determine the molar solubility of Y for XY2 if Ksp is 2.2x10^-4The answer is 0.038, but I'm not sure how
1. 4 answers
2. 838 views
The height of a frustum of a pyramid is 12 and the areas of its bases are 9 and 25. What is the volume of the frustum?
1. 4 answers
2. 1,368 views
The following data set represents a recent set of test scores in a Chemistry Class.90, 90, 95, 100, 80, 80, 75, 80, 70, 60, 95,
1. 3 answers
2. 422 views
Histones interact with DNA at specific loci because DNA has phosphate functional groups. This interaction occurs because
1. 1 answer
2. 640 views
Griffith's experiments along with Avery, MacLeod and McCarty helped to determine the transforming factors of Pneumococcus
1. 1 answer
2. 597 views
Can you read and correct my two paragraphs? Thanks.In John Smith’s The General History, he writes to dispel myths about the
1. 1 answer
2. 402 views
An ice chest at a beach party contains 12 cans of soda at 3.05 °C. Each can of soda has a mass of 0.35 kg and a specific heat
1. 4 answers
2. 2,226 views
A 0.260-kg piece of aluminum that has a temperature of -165 °C is added to 1.4 kg of water that has a temperature of 3.0 °C.
1. 3 answers
2. 1,084 views
Suppose a publishing company has found that the marginal cost at a level of production of x thoudsand books is given by:C'(x)=50
1. 1 answer
2. 631 views
Use the following information to identify element A andcompound B, then answer questions a and b. An empty glass container has a
1. 3 answers
2. 641 views
sorry my friend is on my computer and i told him to get off i will make sure he doesnt ever get on this site again, sorry for
1. 1 answer
2. 401 views
What is a supernova?supernova is the explosion of a star, possibly caused by gravitational collapse, during which the star's
1. 1 answer
2. 498 views
I was growing some bacteria in Petri dishes that I got from wiping my hand with a q-tip. Condensation appeared directly above
1. 1 answer
2. 448 views
What are the effects of the transfer of heat into the inside of the hydroshphere and atmosphere on the development, intensity
1. 1 answer
2. 332 views
What are the effects of the transfer of heat (convection, conduction and radiation) into the inside of the hydrosphere and
1. 1 answer
2. 987 views
Determine the number of grams of NH3 produced by the reaction of 3.5g of hydrogen gas with sufficient nitrogen gas.All of these
1. 1 answer
2. 720 views
Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form
1. 3 answers
2. 1,133 views
I have just started grade 12 U Data Management, and i do not understand tree diagrams. I need help with the following question:
1. 2 answers
2. 487 views
how would I find the hieght of a isocscles triangle if the base was 20 and the area was 240?To find the height of an isocsceles
1. 1 answer
2. 946 views
Which materials produce during the light reactions of photosynthesis are essential to the dark reactions?Light Reactions (Occurs
1. 1 answer
2. 845 views
A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted
1. 5 answers
2. 9,486 views
Given f and g are differentiable functions andf(a)=-4, g(a)=c, g(c)=10, f(c)=15 f'(a)=8, g'(a)=b, g'(c)=5, f'(c)=6 If
1. 1 answer
2. 419 views
What does this poem mean exactly? Is it just the poet out on the sea missing his children, or is there more to it? Would the
1. 1 answer
2. 363 views
An electron is released above the earth's surface. A second electron directly below it exers just enough of an electric force on
1. 3 answers
2. 1,137 views
A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was
1. 1 answer
2. 1,249 views
A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was
1. 1 answer
2. 1,208 views
A concentrated solution of ammonia is added to a solution of zinc oxide?NH3 + ZnI2 => ?? An excess of nitric acid solution is
1. 1 answer
2. 691 views
Can somebody check this for me??Ksp AgCl 1.8x10^-10 Ag2CrO4 1.0x10^-12 AgI 1.0x10^-16 Ag3Po4 1.0x10^-16 1. calc the [Ag+] and
1. 1 answer
2. 679 views
I need help getting different perspectives on this book for a class discussion..please help me!!Thank you for using the Jiskha
1. 1 answer
2. 478 views
simplify:X - - 2x-5 ___ 4 ______ x-3 x + 2 Sara, use parenthesis, like this: x/(x-5) + (3x+6)/(x+2)
1. 1 answer
2. 368 views
x/(x-3)-4-(2x-5)/(x+2)If the problem is this: x/(x - 3) - 4 - (3x - 5)/(x + 2) ...find a common denominator to start. The common
1. 2 answers
2. 542 views
(3x^2+2)/(x^2-4)-(9x-x^2)/(x^2-4)Your problem: (3x^2+2)/(x^2-4)-(9x-x^2)/(x^2-4) Since the denominator is the same, just
1. 2 answers
2. 545 views
Solve S=a/(1-r) for rS = a/(1-r) Multiply both sides by 1-r S*(1-r) = [(1-r)*a]/(1-r) Simplify S*(1-r) = a Multiply terms on the
1. 1 answer
2. 714 views
The answer in the book however says-(5x^2-17x-9)/(x-3)(x+2) so I don't know what I am doing wrong, can you take me step by step
1. 1 answer
2. 1,150 views
Posted by Tammy on Thursday, July 19, 2007 at 10:12pm.download mp3 free instrumental remix (3x+4)/(3x-4)+(3x-4)/(3x+4)
1. 1 answer
2. 968 views
Solve Q= (N-S)/ N for NSo when I multiply both sides by N I get Q(N)= N-S I know I am doing something wrong, the answer is in
1. 1 answer
2. 693 views
The fact that there was that nice symmetry to the question, makes it easier than it first appears.I had it as: (a/b + b/a)÷(b/a
1. 1 answer
2. 502 views
(x)/(x-3)-4-(2x-5)/(x+2)I posted something before this, so now this is how far I got. The answer I know is
1. 1 answer
2. 489 views
(x)/(x-3)-4-(2x-5)/(x+2)I posted something before this, so now this is how far I got. The answer I know is
1. 1 answer
2. 1,012 views
Simplify:(x)+(4/x)-(1) --------------divide top by bottom (1/x)-(3/x^2) I have been trying to solve this one, but I just don't
1. 1 answer
2. 456 views
Simplify:(x^n)+(x)/(x^2)-(1) -------------------divide top by bottom (x^n+2)-(x^2)/ (x^2n)-(2x^n)+1 I can do problems similar to
1. 1 answer
2. 430 views
O.k. this is similar to the other one I posted. There is a technique in my book how to solve similar ones but the examples
1. 2 answers
2. 531 views
The Densities of Liquids and solidsO.k. so here is my problem. I will give you the whole problem just incase my mistake is
1. 7 answers
2. 855 views
O.k. I am confused. So here is what I did.Mass of empty flask plus stopper: 37.34g mass of stoppered flask plus water: 63.67g
1. 4 answers
2. 1,440 views
hmmm...I just can't seem to get it.It looks like I got it right up to the volume of the metal point. Don't I have to divide the
1. 4 answers
2. 600 views
Why do we consider a business-cycle expansion different from long-run economic growth? Why do we care about the size of the
1. 2 answers
2. 583 views
How do you find maxium height when a ball is hit from a height of 0.08m and has a intial velocity of +7.5 m/s straight up?
1. 1 answer
2. 302 views
How do you find the height of a parallelogram if you know the sides?
1. 1 answer
2. 276 views
A solution is made by mixing 12.0 g of NaOH and 75.0 ml of 0.200 M HNO3a) write a balanced equation for the reaction that occurs
1. 4 answers
2. 2,287 views
A solution is made by mixing 12.0 g of NaOH and 75.0 ml of 0.200 M HNO3a) write a balanced equation for the reaction that occurs
1. 3 answers
2. 1,507 views
if a start codon changes into a stop codon, how would this effect transcription? please help.
1. 1 answer
2. 370 views
The lesser of two consecutive even integers is 10 more than one-half the greater. Find the integers.
1. 3 answers
2. 1,547 views
The lesser of two consecutive even integers is 10 more than one-half the greater. Find the integers.
1. 2 answers
2. 509 views
How many ten thousanths are in one thousandth.
1. 1 answer
2. 341 views
Then how many ten thousanths are in one?
1. 6 answers
2. 301 views
What is standard form, when it is written out in words or with numbers?
1. 5 answers
2. 879 views
what does this mean?i i 0 0 0 0 0 0 0 0
1. 1 answer
2. 259 views
I need to write a analysis paper on Samuel Morse. What is an "analysis paper". How can I get this started.
1. 1 answer
2. 407 views
In the book "A Day No Pigs Would Die", the father of Robert is named Haven. I would believe that the name has some sort of
1. 3 answers
2. 438 views
Could someone please help me? I'm super confused by these questions and i just keep making a mess all over my paper!1) A box of
1. 7 answers
2. 933 views
Here is information that you will need to help me solve my poblem:C. (Given the values for m,p,and n caculate the rate constant
1. 2 answers
2. 568 views
5y+10+6y-2=180
1. 1 answer
2. 264 views
What are he two processes that must occur to phosphates before they can cycle directly from organisms to the exchange pool and
1. 1 answer
2. 423 views
Thermal DecompositionWhat is the ratio of moles of CuO produced per moles of malachite decomposed? I have 0.004522431/0.01257071
1. 4 answers
2. 693 views
Situation: You need to step up on a step to reach an object on a high shelf.Instructions: (Part one) Trace the nerve impulse,
1. 1 answer
2. 842 views
How does being tall give plants an advantage?
1. 1 answer
2. 426 views
I think I have identified these right but I am confused on the why part of my question. Am I on the right track or should I read
1. 4 answers
2. 413 views
Which gives off more heat when burning CH4 or CH3OH and why?I think it would be CH3OH, but I am not sure and cannot find any
1. 3 answers
2. 565 views
find the measure of angel R in quadrilateral RSTW if the measure of angle R= 2x, the measure of angle S= x-7, the measure of
1. 3 answers
2. 505 views
Hi I was wondering if anybody knew of a web-site on how to help someone with ADDH get their work done. The reason I ask this is
1. 2 answers
2. 524 views
I need to know the history of integers for a test tomorrow. I have searched numerous history and math sites, but none tell a
1. 2 answers
2. 945 views
Given the thermodynamic data in the table below, calculate the equilibrium constant for the reaction:2SO2(g)+O2--> 2SO3
1. 3 answers
2. 1,111 views

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