Laura

This page lists questions and answers that were posted by visitors named Laura.

Questions

The following questions were asked by visitors named Laura.

Hydrogen reacts w/ sodium to produce solid sodium hydride, NaH. A reaction mixture contains 6.75 g Na and 3.03 g H2. A. Which reactant is limiting? B. What is the theoretical yield of NaH from the above reaction mixture? C. What is the percent yield if 4...

Problem 16-7. Pro forma income statement At the end of last year, Roberts Inc. reported the following income statement (in millions of dollars): Sales 3000 Operating costs excluding depreciation 2450 EBITDA 550 Depreciation 250 EBIT 300 Interest 125 EBT 1...

Would heating a tertiary alcohol change its structure and reaction with hydrochloric acid and potassium permanganate (KMnO4)? Tertiary alcohols resist oxidation, but can be oxidised by reagents such as 2,3-dichloro-5,6-dicyano-1,4-benzoquinone.

What is 12 base 5? Would you just divide 12 by five and get 2 (but then what about the remainder) If you are refering to logs, 12 base 5 means log of 12 to the base 5. Call it x. 5^x = 12. x = log 12/log 5 (any log base can be used) x = 1.07918/0.69897 =...

This doesn't seem like it should be that hard, but it is. List the 2 parts of a controlled experiment. _____ variable-- the factor that is not being tested (know expected outcome) _____ variable -- the factor that is being tested I feel like the answers s...

If I have the temperature, the pressure and the mass how do I calculate the volume? Thanks Of a gas? PV=nRT The ideal gas law. calculate n from the mass and mol mass.

Is there a way to delete the record of a site you have been to: ex. if you went to Google, but then every single time you type in w w w . g it comes up with "google" right below, is there a way to stop that from happening?? You might want to try clearing...

A girl has a body weight of 400n. What upthrust does she need to float?

What is a word for a cause of fire? I don't want examples but I would like a specific word for a causer of fire that could be used no matter what caused it. For example if someone died from murder, the causer of the death would be called a killer or a mur...

I am nearly done with my Red Badge of Courage Analysis, but I would prefer one more thought from someone other than me. If you have read the work, could you tell me what you think Crane felt about soldiers as individuals? I think he thought they were igno...

I wrote a thesis statement on "The Red Badge of Courage" and if someone could revise it, it would be pretty helpful. "Crane believes war is neither glorious nor honorable, but rather a fiery blaze able to only destroy, caused by groups unaware of the flam...

My question says: How is naturalism used in "The Red Badge of Courage" and come up with three quotes. First of all, can someone explain what naturalism really is?

This is for grade 11 math, under quadratic extrema and roots. Fred and Ginger have 24 m of fencing to enclose a garden at the back of their house. From the pictures you can see (shows a large rectangle for the house, with a smaller one attached on the bot...

I need to verify one of my answers quickly...the problem is: The mean annual salary for classroom teachers is $43,658. Assume a standard deviation of $8000. 1) Determine the sampling distribution of the sample mean for a sample of size 256. Interpret your...

Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music Physical Education Science Social Studies Features Contribute Download Experts Forum Job Openings Homework Tips Libraries.Jiskha Link to Us Reference School...

i really need help on this question!! I need to solve it using a system of two equations, the question says that an automobile radiator contains 16L of antifreeze and water. this mixture is 30%antifreeze. how much of this mixture should be drained and rep...

A woman once had a beautiful rubber tree, but when her sister saw her watering it, she laughed and asked why she was watering an artificial plant. So she stopped watering the plant, and in a few months it died. Explain, using at least five characteristics...

For each of the four major classes of organic compounds, identify the subunits. Describe the general process by which all of these subunits are joined together to form larger molecules.

when iron rusts in air, iron(III) oxide is produced. how many moles react with 2.4 iron in the rusting reaction? 4Fe(s) + 3O2(g) => 2Fe2O3(s)

How did U.S. foreign policy at the turn from the 19th to 20th century affect actions taken by the United States towards China?

Calculate the Ka of nitrous acid if a 0.200 mol/L solution at equilibrium at SATP has a percent ionization of 5.8%

Ascorbic acid is a weak organic acid also known as vitamin C. A student prepares a 0.20 mol/L aqueous solution of ascorbic acid and measures its pH as 2.40. Based on this evidence, what is the Ka of ascorbic acid?

A weak base that encompasses a concentration of 1.4 mol per litre has a percent ionization of 0.63%. Calculate the Kb of this weak base

2. What is the basic principle that can be used to simplify a polynomial? What is the relevance of the order of operations in simplifying a polynomial?

What is the difference between a bottle of water and a bottle of hydrgen and oxygen gas?

health care benefits covered by Medicare and Medicaid?

Determine whether the following are redox reactions. If a redox rxn., identify the oxidized reactant and the reduced reactant. a)N2 + 3H2-->2NH3 : YES, Oxidized=H, Reduced: N b)2H2O2-->2H2O + O2 : YES, Oxidized=H, Reduced: O c)2HBr + Ca(OH)2 -->CaBr2 + 2H...

The four possible unknown chemicals are: Cu(s), Ca(OH)2(s), KNO3(aq) and C6H12O6(aq). a) colorless solutions, high electrical conductivity, no change on litmus paper b)white crystals, no electrical conductivity, red to blue on litmus c) shiny brown wire,...

Describe how the range of a projectile varies with launch angle.

When first looking at a slide under the microscope, you should use: Here are my choices: A. low power and fine adjustment B. high power and fine adjustment C. low power and coarse adjustment D. high power and coarse adjustment

I need to graph using the slope and the y intercept this problem and I am not sure how to do it. x+3y=12 Can someone help me?

Describe what the graph of interval [-4,10] looks like. I am trying to check to see if I have done this right. Any help would be wonderful.

Describe how the human population growth issue has and will impact the ecosystem.

This is a 3 part question and it is confusing me quite a bit. Please Help! a) A real estate agent trying to sell you a home in a new developement tells you that two floor plans are available. use x for floor plan 1 and y for floor plan 2. in total there a...

Soybean meal is 12% protein; cornmeal is 6% protein. howmany pounds of each should be mixed together to get a 240 pound mixture that is 8% protein?

How can you determine if a polynomial is the difference of two squares? I think that if the polynomial is x^2-64 that this is a polynomial that is a difference of two squares because if you factor it out you would get (x+8)(x-8). If the 64 in my example w...

I am so lost, can anyone help me? I don't even understand what the teacher wants out of me with this problem. Suppose that a market research company finds that at a price of p = $20, they would sell x = 42 tiles each month. If they lower the price to p =...

If you have a 4 digit number and multiply it by 4, the product will be the number reversed. (abcd x 4= dcba) What is the number?

I am unsure of what formula to use for this problem can anyone help me? Lisa can shovel snow from her driveway in 60 minutes, Jim can do the same job in 55 minutes. How long will it take Lisa and Jim to shovel the driveway if they worked together?

how do i find the formula for this problem, i can't even find an example of it in my text book. A conservationalist wants to find out how many deer are in a preserve. The conservationalist tags 634 deer then releases them. Later, she comes back and catche...

What in the world does this mean? To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled. a. Write...

Oedipus... What eyewitness to the murder of Laius still exists? Scene 2 P

What does 20 divided by 4 minus 5 plus 12 equal? I'm trying to understand the order of operation. I think the answer might be -12. Is this correct?

This is a question my teacher gave me and there are no parenthesis or whatever you might think it needs. It's 20 divided by 4 minus 5 plus 12. I think the answer is -12, but I'm not sure. PLEASE HELP!!!

How do you solve a problem that asks you to find the 500th term? A beach ball has six vertical sections colored white, orange, yellow, blue, red, and green. If you spin the ball so that 500 colors go by and the first color is white, what is the 500th colo...

You have a plastic tray with cold water in it and then you have three cups holding it up and one cup has hot water in it. You put dye in the cold water on top of the hot water. Why does the dye move away from the hot water?

I am supposed to find the ticket sales of a concert using this formula: N(x)= -0.3x^2 + 6x + 15 X represtents the number of days since the concert was first announced. I need to find out when daily ticket sales will peak and how many tickets will be sold...

Can someone help me figure out what formula I am to use for this word problem? I am having a hard time. If the sides of a square are lengthened by 7cm the area of the square becomes 121cm^2. What is the length of a side of the orgional square?

A television has a diagonal of 10 inches and a width of 8 inches. what is it's height? i think the answer is nine inches, am I correct? If I am not how do I find the answer?

Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me h...

What does NaHco3 + HCl produce?

it says the knights banquet hall uses the equation 25n-c+1250=0 determine the cost for a hall rental the legions banguet hall usues the equation 30n+995-c=0 to determine the cost for thier hall rental express each equation in slope y-intercept form- c=mn+...

we are supposed to create an advertisement for a revolutionarynewspaper- around the constitutional convention time.. what products do you think they would sell at that time??? thank you!

Determine whether the system of inequalities is infeasible, has alternate optimal solutions, or is unbounded for the function f(x,y)=2x+y

The curve f(x)=-x^4+2x^2+x has a tangent at the point (1,2). Is this line tangent to the curve at another point and, if so where?

what is a predicate? My son's assignment is to circle the action verb and underline the predicate. I've tried to explain what a predicate is, but he still doesn't understand.

91.7g of HCL solution was added to the calorimeter and brought to a constant temp. Then 0.5278g of MgO was added and the Temp rose from 25.65C to 32.60C and held steady. Then 0.0185g of Mg was added and the temp again rose from 30.35C to 32.20C. Calculate...

Are Irish Americans considered a subordinate group in American History? I need to do a paper on a subordinate group and I was thinking of using Irish Americans.

What kind of materials block sound.

calculate the final concentration if 4.0 L of 1.5 M NaC1 and 2.0 L of 3.0 M NaC1 are mixed.

In a clean 250mL volumetric flask, 125mL of a 6.0 M hydrochloride acid was added. This was then diluted with more water to reach the 250mL mark. What is the molarity of the acid at this time?

1. Products that would be used in calculating GDP include: a. Toys manufactured in China at a factory owned by a U.S. company b. cars manufactured in Tennessee at a factory owned by a Japanese automobile company c. plastic manufactured in Kentucky and sol...

1. The main disadvantage of using shells as money, instead of coins, would be a lack of: a. durability b. portability c. uniformity d. divisibility I think its B. portability?

What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?

What is the three dimensional structure of methane? Why?

Name one structural and one chemical difference between acetylene and ethylene. Give reasons.

What is the formula of 1,3-butadiene?

Are these compounds organic, if not what are they? Kmno4 CH3OH C6H6 PdC12 CH3CO2H

Why is benzene much less reactive than 1, 3, 5-cyclohexatriene?

Why is the benzene molecule represented as " a flat cyclohexane with a ring inside?"

Why do cis and trans isomeric compounds exhibit different properties?

What is the difference between hydration and hydrogenation reactions?

I am currently studying for the cbest exam in all three areas, math, reading and writing. Does anyone have any current information that would help better prepare for these tests.

how do you integrate sin (x^2) dx?

how do you integrate (3x+1)/(x-1)x^2 dx?

how do you integrate ln(x^2+1)dx?

is the integral of 1/x^2, 2x ln of the absolute value of x^2?

How does the government participates in a mixed economy? Based on principles of the free market, allowing some government intervention. Is there anything else i can say?

An alcohol has an OH functionally in it. Do you expect it to be a base? Why, or why not?

What are amine salts?

Explain why alcohols of lower molecular weight are generally soluble in water but those of higher molecular weights are generally not.

Why do carboxylic acids generally have higher melting and boiling points than alcohols, ketones, and aldehydes of comparable mass?

I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 i...

Give an example of a disaccharide

State two differences between DNA and RNA.

What is the difference between an amino acid and a protein? How does this difference in structure affect biological function?

1. The president of the United States is elected by the electoral college. What type of system is this? 2. In ancient Athens (Greece) tribes and generals took turns at power. This is an example of what type of political system? 3.What type of political sy...

How is elasticity of supply related to elasticity of demand? Is this correct? I know that the terms supply and demand refer to the behavior of people as they interact with one another in markets. Buyers determine demand and sellers determine supply. Just...

Using L'Hospital's rule: find, lim as x approaches (-) infinity of xsin(1/x)

how do you take the derivative of e^(x^2)?

Using L'Hospital's Rule, find, the limit as x approaches 0 of x^(sinx)

How does this statement go: A slim to none chance or a slim to nothing chace

Hi guys, I thought it would be due to aromaticity breaking difficulty? In the bromination reaction, why are the double bonds which are par t of the phenyl r ing not brominated? A. We only added one equiv alent bromine. B. T he phenyl r ing is aromatic and...

Prove: 3/ a(2a^2 + 7)

Prove: there exists x and y for c=ax+by iff gcd(a,b)/c.

find the integral of x^2 e^-xdx with the limits of negative infinity to zero. so far, I have, lim as t approaches negative infinity of (-e^-x [x(x+2) + 2] from 0 to t does this converge or diverge?

What is the difference between an inelastic and an elastic collision? What does kinetic energy have to do with all of this? Give an explanation that explains the role of momentum, kinetic energy, and such in collisions. I think elastic collisions is when...

what is the derivative of 4(x^2-1)^-1/2

what's the limit as n goes to infinity of (2 + 4/n^2)^(1/3)

what are the four quantum numbers of the last electron of As this is what i have n=4 l=1 ms= 1/2 i don't know how to calculate ml. I know it's either: -1,0,1

Answers

The following answers were posted by visitors named Laura.

Search for it on the Barnes and Noble website... It has links to readers guides and other stuff... i was actually looking for the same thing and your question came up on google. Hope this helps!

By the way, this was for my classmate, Jimmie who is also doing the same assignment. But if someone else could help as well, that would be great.

actually, i don't really get what's the question asking. Can you please explain?

A weak base that encompasses a concentration of 1.4 mol per litre has a percent ionization of 0.63%. Calculate the Kb of this weak base

well, water can be frezzed, and rubbing alcohol cant. Also, rubbing alcohol's density is greater than water. So the alcochol would be the solvent and water would be the solute.

to make things short yes it would be capitalized.

You can say el cocodrilo es un animal peligroso tiene unna boca grande y dientes filosos. So... the crocodile is a dangerous animal, it has a big mouth and sharp teeth

Now I am going to St. Peters Bascila, that is a wonderful church.

I think the answer is low power and fine adjustment. That's what I put on the test and I got it wrong. my second choice would be lower power and coarse adjustment, which is choice C. Is my second choice right?

Okay so the answer is choice C. Thank you for your help.

Mentoring, observation and interviews are three important strategies in developing student teachers. There is a free online study unit on The Open University's OpenLearn website on this. The unit, which gives a flavour of the Open University's flexible PG...

Have you thought of Rosa Parks? She was not a famous or educated person, just a lady trying to get home, but she sparked a huge movement in the south regarding segregation. She is one of my heroes!

What time frame is your class talking about when your question says "in these critical times"? today could be considered a critical time for civil rights and civil liberties, and do these activists need to be American? If not, then what about Nelson Mande...

I don't understand the equations I am having a lot of trouble.

thanks, problem solved!

Thank you to everyone who responded this helps a lot!

Just google roger williams I found several sites that gave good info.

oooooooooooh ok thank you.

if you are talking about a vowel (a,e,i,o or u), a line over a vowel means the vowel is a long sounding vowel.

876-235= the smaller number.

So I should find the vertex?

oh and this is grade nine math

Thanks Ms.Sue and Writeacher...website was a big help. My son now has a better understanding subject/predicate! very happy :)

1. Is wrong. Its... Quiero ir a Colorado para Navidad 2. Has comprado algo para la cena ? 3. Este celular es solo para emergencias. 4. Ella siempre viaja en autobús.

1. soy 2.somos 3.son 4.estoy 5.fue 6.es , era ?? 7.es 8.esta

Thank you, for your feedback. I just read another part of my economic book and B is definitely the answer.

2x+28<6x -2x -2x 28<4x - - 4 4 7<x =x>7

thank you. i understand now.

yes, I got this answer, as well THANKS

thank you for your answer, but this example problem is not the same as mine. the example problem is (sin (x))^2, in other words the whole quantity is squared. mine is just sin of x^2. any suggestions here?

Its the syllable with the loudest stress. The accent is usually on the syllable before the suffixes such as ion, ical, and ity.

Yes, you are to prove that 3 divides [(a)(2a^2+7)] probably by using the greatest common divisor.

the exact problem states: for an arbitrary integer a, verify that 3/a(2a^2+7). This is a problem out of a number theory book included in the section involving gcd.

thanks, I'll try these methods

How did you get part B?!

2009 UoP student still stuck on this question...Thanks for all the help. Most of you have graduated or are pretty close by now, but thanks again!

so it will be 1 as the last electron comes on that one correct? umm and i don't see the link you posted :S

thank you, count iblis. you have been a tremendous help with homework.

at x=4, y=0. if y=0, there is no y vlaue to "slope" the line, so the line will form vertically at x=4.

you need to find the permutation when order matters. look up the formula if you don't know it off hand. this should help you start...

According to MedicineNet(2008), “Mental illness is any disease or condition affecting the brain that influences the way a person thinks, feels, behaves and/or relates to others and to his or her surroundings. Although the symptoms of mental illness can ra...

The American Experience: California Edition (Prentice Hall Literature Timeless Voices, Timeless Themes This is the textbook we are using and it says, " Satire is writing in which an author uses humor to ridicule or criticize certain individuals, instituti...

There was a fee tips in there but they are looking for the ones that are not in there. That is what I am having a hard time finding,

Thank you Ms. Sue. I have found the answer's to this question but I do appreciate how quickly you got back to me

perpendicular lines have negative reciprocal slopes such as 3 and -1/3 so put them into y=mx+b form and see.

chris - do your own homework. at least try it first, show some work or where youre stuck on.

assuming it drops from rest you know: vo=0 t=2.8 a=9.8 (gravity assuming down is +) v=? use the equation v=vot+at^2 then you want to find height. x= vot+.5at^2

time and space grown is also a factor

to solve system of equations you solve for one variable and plug into the next in this case you have an equation for I so plug into the next equation and solve (23/w) + w = 32

Well, I was thinking maybe it can be a representation of the 2. Dorothy could be referring to the fact that when you look at who is really an illegal or legal immigrant, you can make a quick judgment. We assume that since people look a certain way and jus...

I asked the professor, he said I didn't need it to solve the problem.

What was new and a first for UK campaigning this year?

It says that answer is wrong :( the probability to each outcome is 1/504 I tried 5/504 for my question and it came out wrong

4391 because here it is worth 4000 9499 is only worth 400 2240 is only worth 40 1944 is only worth 44

-4/13y-7=6 -4/13y=6+7 -4/13y=13 -4/13=13y -4/(13*13)=y -4/169=y p+3/10=4 p+3/10=40/10 p=40/10-3/10 p=37/10 p=3.7 you can solve the other two in the same method, hope this helps!

[(3+1)*6]-3=17 [4*6]-3=17 20-3=17 17=17

26/2=13=number of birds paula saw 13=6+x 13-6=x 7=x so paula saw 7 blue birds

you need to add or subtract the rxns with the KJ given to create the rxn that you are trying to solve for. H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ see that H2SO3 is common to the rxns, so you add this (that is, ass 62KJ) so you have H2SO3(l)=>H2O(l) +SO2(g) as y...

I need a formula to use.

5,844 bushels per acre

My topic is:Animal rights. I have to tell/show how I made my topic into chart, organized with at least 3 levels, at least 4subtopics. I gues it is describing the process.How can I create a graphic organizer(chart) and present to the class on this topic. P...

but..how do i get the weight of water displaced? i don't get that part. because if i do 140- (.00273*9.8*5232.86) =0

Sorry yes it is the first one The second would be that same way

Yep you were right. Thank you so much. I really appreciate it.

3p^2 + 4p^2 = 7p^2 7p^2/7=63/7 p^2=9 √p^2=√9 p=3

1. - 140 2. - 540 3. - 2500 4. - 3980 5. - 4550

if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?

Thank you so much I really appreciate it!

Sheila your answer relates to Primitive Cubic Unit Cell, and the "third part" should read "third part is 16 * square root of 3," not "third part is 6 * square root of 3."

670 ^ 2x335 \ ^ 2x2x67 You'r answer would be 2 to the power of 2x 67= 670

(5.0 g) / (90.03488 H2C2O4/mol) / 0.40m = 45.01744

m = 4.0/1200 = 300 T = 2*1.86 c/m*300 = 1116

Ok, I'm sorry. Not taking chemistry, but I'm taking a practice test, and I didn't know what to do. I want to be ready for next year. Thanks!

How far will the dog run?

Thanks so much! :)

I'm thinking personality test

Thanks I reread that part and it's d! I always over think my answers

A-A^+ D^2+ + C = No Reactions B^2+ + C = B C^2 A^+ + B = A + B^2+

i don't understand how i'm supposed to use the reduction potentials table to blance it

wow thank you very much, that site is very helpful and you've been very helpful! Thank you!

how are we supposed to add them together when there is no I in the first equation?

that is helpful, i just don't get how to get the graph right, mine went up, how do i get the numbers and plot the graph correct?

I just wanted to say thank you to Wendy also I was really having a problem with these Fallacies but you helped me really understand.The notes just confused me more. Thank you really!!!!!!!!

Ok, so first I want to say that it is ETHNICS, not ethics... but yes I am also having difficulty with this one, just like the rest of you, but the thing is that it is a research paper, where you have to research the topic... research... meaning, search fo...

Decrease in pressure

vf^2=2*9.8*520 vf=100.955 ??

ok sorry about that

Hi Sue, how can i research each of these question in on the internet, using the most efficent way. I learn diffrently and my deceptive reasoning is weak in this area. if i know the ansswer,i can learn where how it originated, thanks