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Kat

Questions and answers by Kat

Questions (324)

The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate
1. 5 answers
2. 2,315 views
You wish to know the enthalpy change for the formation of liquid PCl3 from the elements shown below.P4(s) + 6 Cl2(g)--> 4
1. 4 answers
2. 5,926 views
Let f(x)=2x^2+x-3 and g(x)=x-1. Perform the indicated operation then find the domain. (f*g)(x)a.2x^3-x^2-4x+3; domain:all real
1. 23 answers
2. 20,279 views
Which of the following are examples of asexual reproduction?Select all that apply. - a male and female organism producing
1. 5 answers
2. 3,590 views
1) Why is frequency an element needed in the sound industry?and 2) When there is a sound pressure level of two different sources
1. 1 answer
2. 690 views
what is a cut off frequency and it's application?I need the application explaination more then the definition of cut off
1. 1 answer
2. 500 views
Christopher Columbus.Okay I need someones help pretty please ^_^ Uh well about columbus and Rodrigo Bernajo, who was first? Did
1. 3 answers
2. 741 views
What are stocks called in the largest and strongest companies?And What are stocks that come from very small companies that are
1. 1 answer
2. 419 views
A wooden block is submerged in a tank of water and pressed down against the bottom of the tank so there is no water underneath
1. 1 answer
2. 654 views
Doug Maltbee formed a lawn service business as a summer job. To start the business on May 1, he deposited $1,000 in a new bank
1. 4 answers
2. 870 views
a lolution in which the crystalizing rate of the solute equals the dissolving rate of the solute must be?saturated?
1. 1 answer
2. 455 views
a change in pressure would have the greatest effect on the solubility of aA. solid in a liquid B. gas in a liquid C.liquid in a
1. 5 answers
2. 7,011 views
what is the molarity of a solution of KNO3(molecular mass=101) that contains 404 grams of KNO3 in 2.00 liters of solution?A.
1. 3 answers
2. 3,273 views
How many moles of H2SO4 are needed to prepare 5.0 liters of 2.0M solution of H2SO4?a. 5.0 b. 10 c. 2.5 d. 20 Go back to the
1. 3 answers
2. 5,694 views
what is the total # of grams of NaOH(formula mass=40) needed to make 1.0 liter of a 0.20 M solutiona. 80.g b. 2.0g c. 8.0g d.
1. 2 answers
2. 2,045 views
which solution has the highest boiling point?a. 1 mole of NaNO3 in 500 g of water b. 1mole of NaNO3 in 1000g of water c. 1mole
1. 3 answers
2. 2,693 views
What Occurs as a salt dissolves in water?the number of ions in the solution increases and the freezing point decrease the number
1. 3 answers
2. 1,125 views
In the Laboratory, a student mixes aqueous solutions of NiSO4 and NaOH. whatwill be the result of this experiment?Ni(oh)2
1. 4 answers
2. 2,432 views
what occurs when sugar is added to water....It dissolves? the freezing point of the water will decrease and the boiling point
1. 1 answer
2. 658 views
Does anyone know where I can find Mississippi's landlord laws? Or laws related to having cars towed?Thanks.
1. 1 answer
2. 417 views
Does anyone ever played the SimMarketing game, because i really need help with it
1. 1 answer
2. 352 views
Who decides when the Electoral College casts its votes for president?
1. 1 answer
2. 428 views
Who decides when the Electoral College casts its votes for president?
1. 2 answers
2. 657 views
The photogenic work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light.
1. 4 answers
2. 2,415 views
Suppose that you got a score of X=78 on an English test for which the mean was (mu)=70 and the standard deviation was (lower
1. 2 answers
2. 1,084 views
Im carrying out an investigation on respiration, comparing the different rates in maggot tissue and mung beans. i was wondering
1. 1 answer
2. 412 views
I can't think of any that would work. It needs to be 800 words and "Explaining a Concept." It can't be a how-to, and it also
1. 6 answers
2. 376 views
Essay ideas?It needs to be 800 words. The two things must be similar at face value, but have differences between them. Help?
1. 2 answers
2. 471 views
how has genetic engineering helped people
1. 1 answer
2. 443 views
How many different book genres are there and what are they?
1. 1 answer
2. 393 views
Should nations pursue goals of international cooperation to ensure security?
1. 2 answers
2. 499 views
I've been trying to figure this one out all day. I have to use either substitution or elimination to solve a system for how many
1. 7 answers
2. 538 views
Okay, i need help. I'm solving linear equations in intermediate algebra. My problem is that I never know which number to
1. 10 answers
2. 597 views
Hi, I'm looking at my book and I can't see how they've gotten this answer:The last bit: -11/20y=-3 Their answer is y=60/11 How
1. 9 answers
2. 821 views
Kay, so apparently Casey and I are both having trouble with creating a matrix from a system. I know what a matrix is, but i can
1. 1 answer
2. 355 views
A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2.If 1.00 ml of 12 M HCl is added to this, what will be
1. 4 answers
2. 955 views
Posted by Kat on Monday, March 2, 2009 at 11:21am.A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If
1. 4 answers
2. 563 views
Choose ONE animal species. Your goal is to describe the way in which an evolutionary change might occur for a particular
1. 2 answers
2. 1,110 views
Person X travels from A to B and then back the same route at a constant speed of 50 km/h. Person Y travels the same route to B
1. 1 answer
2. 477 views
Rewrite the equation so that y is the ntion of x:a. 1/7(49-7y)=5x-3y+14 b. 4(2x-3y)=-5(x+3y) Can you please explain and show how
1. 4 answers
2. 529 views
Rewrite the equation so that y is the ntion of x:a. 1/7(49-7y)=5x-3y+14 b. 4(2x-3y)=-5(x+3y)
1. 1 answer
2. 377 views
If you were an environmental researcher and were given funding to assist with one environmental issue, which of the following
1. 1 answer
2. 469 views
P15-1 Comparative statement data for Douglas Company and Maulder Company, two competitors, appear below. All balance sheet data
1. 3 answers
2. 752 views
Statistics students were asked to go home and fill a 1-cup measure with raisin bran, tap the cup lightly on the counter three
1. 2 answers
2. 511 views
Write the equation of the line in slope intercept form that is parallel to y=-2+11, and passes through the point (4,2).
1. 1 answer
2. 393 views
If a father wants to have $100,000 to send a newborn child to college, how much must he invest annually for 18 years if he earns
1. 2 answers
2. 1,139 views
In Los Angeles there are three network television stations, each with it own evening news program from 6:00 to 6:30 PM.
1. 1 answer
2. 524 views
Hi, I'm trying to figure out a good topic regarding Alfred the Great.My paper needs to be 4 pages, and it can't just be a
1. 4 answers
2. 512 views
Circle L has segment LJ and segment LK as radii. Those 2 segments are perpendicular. Segment KM and segment JM are tangent to
1. 3 answers
2. 1,154 views
Hi!My assignment is to write a paper on how love and hate relate to Jean Anouilh's Becket. I'm confused about what I should
1. 1 answer
2. 363 views
I'm looking for some resources that give webcam usage data or any kind of research studies on them.I've checked ebscohost and
1. 1 answer
2. 416 views
In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ...>> Increase by a factor of
1. 4 answers
2. 1,521 views
To reduce the frequency of a particle when it behaves like a wave, we need to ...-Increase its mass -Reduce its speed -Increase
1. 5 answers
2. 449 views
What is the common theme between Modern Totalitarianism, Stalin's Collectivization, and the Kulaks?
1. 1 answer
2. 446 views
�ã200 + �ã70 + �ã300 =
1. 1 answer
2. 309 views
I am not sure how to multiply and simplify this problem:Sqrt 50 * Sqrt 54
1. 5 answers
2. 446 views
(x-10)^2=20Give exact and approximate solutions to three decimal places.
1. 3 answers
2. 390 views
Which acid is stronger: HClO2 or HClO3?Can you also explain why?
1. 4 answers
2. 1,459 views
How many grams of solid sodium sulfate can be added to 1000L of a 0.02mol/L solution of calcium chloride before a precipitate
1. 4 answers
2. 481 views
Calculate [acetate] of 0.057 mol/L solution of acetic acid of Ka = 1.76x10^-5i know to find Ka it's: Ka= products/reactants so i
1. 1 answer
2. 398 views
select one online source that would be suitable to use as reference for a research paper, a source that you would consider
1. 4 answers
2. 642 views
At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without
1. 2 answers
2. 1,173 views
how do you solveLim sqrt((x+1)/(4(x-1)) x-infinity
1. 1 answer
2. 309 views
What does Paine say to the Tories who stand in the way of Independence? Why did he believe it necessary to address part of his
1. 1 answer
2. 351 views
a balloon is filled with .50 moles out of gas at room temp and normal room pressure, the balloon volume would be 11.2L. if you
1. 2 answers
2. 587 views
a 50.0 ml sample of a 15% (m/v) solution of H2SO4 is added to water to give a final volume of 250.0 ml. What would the final
1. 3 answers
2. 628 views
If the solubility of alum is 1g @ 1 degree celcius and 1.7 g at 6 degree celcius how much alum (KAl(SO4)2.12H20) would you
1. 1 answer
2. 410 views
Hi, all! I'm trying to right a small and simple paragraph in french. This is what I'm trying to say:Yesterday, I read an article
1. 7 answers
2. 633 views
What volume of 14.1M HBr is required to make 250mL of 1.25M HBr solution by dilution with water?
1. 1 answer
2. 408 views
Determine the number of triangles ABC possible with the given parts.b=60 a=82 B=100
1. 4 answers
2. 1,454 views
Which of the fllowing dimensions describes te right triangle with an area of 36cm^2 having the greatest perimeter?
1. 3 answers
2. 336 views
solve the following simultaneous equations5y=13 x+y/2+30=0 2x-2y=9 2x+2y=9 The first set, I have no idea and the second set I
1. 2 answers
2. 605 views
Questions about Henry Ford the inventor:1. Why was Ford not satisfied with the Model T at first? 2. How would working in a
1. 5 answers
2. 1,489 views
You have a bag of lots of red and white marbles. In the worst case, how many would you have to pull out to get two marbles of
1. 4 answers
2. 879 views
I have to write a paper about my neighborhood (east flat rock NC) using 3 of the 5 themes of geography. The 3 that I used were:
1. 5 answers
2. 553 views
Free radicals are also importantin many environmentally significant reactions. For example, photochemical smog, which forms as a
1. 1 answer
2. 543 views
Arrange the following 0.1 M solutions in order of increasing pH and state why you placed eachsolution in that position: NaCH3COO
1. 3 answers
2. 3,282 views
The beaker contains 0.3000 M HCl and the buret contains 0.3000 M NaOH.Write a complete balanced equation for the neutralization
1. 2 answers
2. 853 views
A 34.6 g block of metal at 2.1oC is dropped into 100.0 g of water at 97.3oC. If the specific heat of the metal is 0.084 cal/goC,
1. 1 answer
2. 450 views
Several years ago a company invented plastic ice cubes. These were colored plastic cubes with frozen water (or another
1. 1 answer
2. 473 views
Use Hess' Law to calculate the heat of the following equation. Show all work including the reactions that you use, in the form
1. 2 answers
2. 1,265 views
OF2(g) + H2O(g) -> O2(g) +2HF(g) ΔH°rxn = -318 kJUsing bond energies, calculate the bond dissociation energy of the O-F bond,
1. 3 answers
2. 1,629 views
OF2(g) + H2O(g) -> O2(g) +2HF(g) ΔH°rxn = -318 kJUsing bond energies, calculate the bond dissociation energy of the O-F bond,
1. 4 answers
2. 3,886 views
Use standard heats of formation in Appendix L to calculate standard enthalpy changes for the following reactions.1.45 x 10-2 mol
1. 3 answers
2. 975 views
4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g)If standard enthalpy change is -906.2 kJ, what quantity of heat is evolved or absorbed in
1. 4 answers
2. 1,827 views
Hi, I'm writing this essay on whether it is better to know the truth or it is not. And I said it is better to know because the
1. 4 answers
2. 1,050 views
A student places 5.77 grams of wex (a mythical substance often burned for light on other planets) in a test tube and then melts
1. 3 answers
2. 440 views
Entropy both increases and decreases when you build a jigsaw puzzle. How is this possible?
1. 3 answers
2. 450 views
A ship carrying ice over a lake breaks and spills its cargo.If 3650.0 g of ice at 0.00 celcius are released into the 15456200 g
1. 1 answer
2. 398 views
Hello, i'm writing an essay about how truth should be told because it will help materialize solutions to problems and
1. 4 answers
2. 493 views
Two rectangles are similar and the ratio of their sides is 1: 4. Find the ratio of their perimeters??? Find the ratio of their
1. 1 answer
2. 551 views
Volume 3 1Abstract Medication errors are a significant issue affecting patient safety and costs in hospitals often posing
1. 2 answers
2. 615 views
What are some negative impact of technology?
1. 1 answer
2. 329 views
The surface area of a rectangular prism is 10.4 in2. What is the surface area of a similar prism that is larger by a scale
1. 2 answers
2. 1,269 views
Jess makes 5/8 free throws how many will she make if she takes 720 tries
1. 1 answer
2. 301 views
H2PO4-(aq)+OH-(aq) -> HPO42-(aq)+H2OExperiment/[H2PO4-](M)/[OH-](M)/ Initial Rate(mol/L·min) 1 0.0031 0.00041 0.0021 2 0.0031
1. 2 answers
2. 961 views
2 NO(g) + 2 H2(g) --> N2(g) + 2 H2O(g)Reactant Concentration(mol/L) and Rate of Appearance of N2 [NO] [H2] (mol/L·s) 0.420
1. 2 answers
2. 477 views
How is Surface catalyst(heterogeneous) and homogeneous catalyst different? I'm in 10th grade chemistry and I don't understand
1. 3 answers
2. 505 views
Kp for the following reaction is 0.16 at 25°C.2 NOBr(g) (reverse reaction arrow-> <-) 2 NO(g) + Br2(g) What happens when you
1. 2 answers
2. 536 views
Zinc carbonate, ZnCO3(s), dissolves in water to give a solution that is 1.7 multiplied by 10-5 M at 22°C. Calculate Ksp for
1. 4 answers
2. 2,894 views

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