Answers by visitors named: Kate

Ok that looks wrong. 100g should be under solution for the mass, 18.02g/mol for the solvent of H2O and 85g/mol for the solute of NaNO3. I have to find mass of solute and solvent and the moles of solute and solvent. Pls help anyone!

Well there's serotonin, acetylcholine, norepinephrine and dopamine... An excess of dopamine is usually associated with schizophrenia. Serotonin and norepinephrine can be associated with depression. Norepinephrine is prevalent in the sympathetic nervous system, and when released by the adrenal glands it increases our heart rate and our blood pressure. GABA is another neurotransmitter.

OMG i've made a mistake while typing: The question should be: The Beatles recorded together until 1970.

found by me on some website: 'five basic things to survive; food, water, fuel (for cooking and heating), clothing, and shelter. ' Lol i'd never said that it was fuel....

Begin by measuring the mass of the empty calorimeter and record the value. Next, add approximately 1-1.5 g of solid NaOH pellets and record the mass. Carefully grind up the pellets using a mortar and pestle. Then, transfer the ground up NaOH into the calorimeter and measure the mass. Pour 25 mL of 6 M HCl into a graduated cylinder. Measure the temperature of the HCl prior to the reaction using a thermometer. Then, transfer the liquid HCl from the cylinder to the calorimeter containing the ground up NaOH and replace the lid and thermometer. Observe the rising temperature and record the temp of the reaction. Measure the combined mass of all the contents in the calorimeter and record the value.

Part 2 Secure the stand and two clean burets. Using the funnel, fill one buret to the 0 mark with HCl. Rinse out the funnel thoroughly and carefully fill the other buret to the 0 mark with 2 M NaOH solution. Drain 25 mL of NaOH solution into the calorimeter. Record the mass of the calorimeter with the NaOH. Next, take the temperature of the NaOH and record the value. Add 25 mL of HCl, quickly, to the calorimeter. Observe the temperature and record the final temperature of the contents. Take the final mass of the contents. sorry, it would only let me post in segments

Yeah i meant -x^4

no i put it exactly how the paper has it log^1/8) and then it has x=-1 I do not understand how to do it at all.

Thank you for breaking this down for me!!

Thanks!!

Thank you so much for the help

Is this correct? (755 mmHg)(400.0cm^3)/298 K = (P2)(50.0cm^3)/(358 k)

Okay... 1) 275 g NaCl ----> 4.71 mol NaCl 2) Next, 4.71 mol NaCl * 1Cl2/2 NaCl = 2.36 mol Cl 3) V= nRT/P v= (2.36 mol)(0.0821 L atm/K Mol)(313K)/687mmHg = 0.0883 L Final answer: v = 0.0883 L

So, if I convert mmHg to atm I get .904 atm. When I plug that into the equation, the final answer is 67.1 L?

mols HCl = 0.750 M x 0.025 L = 0.0186 mol M = 0.0186 mol/0.500 L = 0.0372 the answer is 0.0372 mol/l

Thank you, I made the change. My professor is very precise, so I'm glad you noticed that!

In the question above this one it says refer to a solubility chart, but my professor never taught us how to answer these questions while using a solubility chart so I have no idea what to do. I've tried going to his office hours for help, but he's only there when I have a class. It's the standard solubility chart (if you looked it up on google or something) but I have no idea how to answer the question.

So, for KCl, using the graph... T.....mass KCl/100 mL 10....30 20....32 or 33 30....35 40....38 50....41 60....44 70....46 80....49 90....52 or 53 100...56

I was thinking that if, for example, two different pressures were given, two different volumes were given, two different temperatures were given and only one mole, then you use P1V1/n1T1...etc to find the missing mole. But, if only one pressure, one volume, and one temperature were given and you needed to find moles, then you use pv=nrt. That's how I tried figuring out the difference, but I was afraid there was some exception to throw me off (which usually always happens on tests...)

Okay, good. I think I'm all set then. Thank you!

Yup! Thank you!

I just wanted to get these checked. I think 1 is b, 2 is a, 3 is d, 4 is c, 5 is e and 6 is a

Im doing homework on burning magnesium, so mp something simular to everyone else but heres some help:- the big of idea is like the particles reacting like magnesium and oxygen to form magnesium oxide, so the particles of both reactants (magnesium & oxygen) have collided to form magnesium oxide and also when they collide they give off heat, and thas the big idea of energy, i hope this helps (:

1. j'ai un ordinateur. 2. vous n'avez pas de chaise. forms of avoir j'ai tu as il/elle a nous avons vous avez elles/ils ont

#1 I'm having trouble understanding why you say it is not a real arguement. Person A is stating that he saw Bob and person B is saying that person A really saw Frank. How is it possible for the two statements to both be true and thus inconsistent? #2. Can't person A THINK something but KNOW the opposite (as person B is saying he does) making the two statements consistent? #3. I do not get your answer to question 3. I am needing to know if I assume that statement A is true, what can I know about statement B (that it's necessarily true, false, or undetermined), and etc. for questions b, c, and d. I'm thinking the answer would be undetermined in each case. (If A is true, B is undetermined, etc.)

Can you explain that?

They are lines that run next to each other, but can go on forever and never meet or intersect.

what do you mean like an M and m candy

Well M and m are all diffrent colors and since all the m and m arent the same color it means there uniquine and people arnt all the same we are all unique do you get what i am saying

isnt a metaphoring comparing to things using like or as

you are as unique as an m and m You as sweet as an m an m

his fault like as in raising the taxes or distrapution

like how he says he wants to give the taxes or somthing like that to other people

I did not get the correct answer... Solve for MassSteel. Here is my work- masssteelx specific heat rod x (Tfinal-Tinitial) + massH2O x specific heat water x (Tfinal-Tinitial) = 0 MassSteel = -massH2O x specific heat water x (Tfinal-Tinitial)/ specific heat rod x (Tfinal-Tinitial) MassSteel = -120mL x 4.18J/gC x -1C/ 0.452 J/gC x -1C MassSteel = 1109.73 What did I do wrong???

It worked!! Thanks so much for your help!

Yes, the 2nd reaction is the 1st reaction reversed. The book says when you have a reaction that is reversed, take the opposite sign of the ÄH... which should be -154 by that definition. I'm not sure if I am suppose to divide 154 by 2??

so what would the x-intercepts be? (SQRT3, SQRT-3) ?

I am having trouble with this also. I think my brain is stuck at this point. How do you find the article E-5.07. When I search that it brings up a ton of articles. Thanks so much!

A set of input values is sometimes referred to as the replacement set for the independent variables. Evaluate each function for the given replacement set. f(x)=3x-6;{-3.5,-1,1/4,2,11}

That not what I mean i mean in terms of friendship.

could you give me a summary of it?

how do you no?

how do you put the calculation on words?

yes

0.48m 5213m

Yes, 20/24. Makes sense. Thank you!

7.8?

I'm not sure I understand.

So, 12 divided by 3, minus 6.4?

I understand now. I think our messages were overlapping. Thank you!

2.4?

This is a right triangle. Therefore the Pythagorean Law applies. 150^2+300^2= Distance^2 22500+90000=D^2 112500=D^2 335.41=D Rounded to the nearest tenth, D=335.4 feet

SMALL-SAMPLE CONFIDENCE INTERVAL FOR A POPLATION MEAN 90% Confidence Interval = x-bar +/- 1.65 * s/SQRT(n) n = NUMBER OF SAMPLES [3] Cumulative Distribution Function Student's t distribution with 3 DF x P( X <= x ) 1.65 0.901247

x = r cos(45) ...(1) y = r sin(45) ...(2) Dividing (2) by (1): y / x = tan(45) = 1 y = x.

What are like terms

S = 11 + 18 + 27 + 38 + 51 + 65 + 82 + .........+Tn S = 11 + 18 + 27 + 38 + 51 + 65 + ................ + Tn --------------------------------------... 0 = 11 + (7 + 9 + 11 + 13 + ....(n-1).terms.................) - Tn 0 = 11 + (n - 1)/2 [14 + 2(n - 2)] = 11 + (n - 1)(n + 5) - Tn Tn = n^2 + 4n + 6. The given series in sigma notation is as follows. SIGMA[k^2 + 4k + 6] the lower limit being k = 1 and the upper limit k = n

a polymer is a molecule with repeating units usually joined with covalent chemical bonds. 2 examples of naturally occurring polymers are proteins & starches.

I was thinking of things like Myspace and how putting your personal information out there can put your life in jeopardy. Also, if you save something to a hard drive on a computer open to other people, then anyone can see your information and do whatever they want with it. I'm just not positive if my answers and thoughts are effective enough for this question since this quesion is my final exam for my computer class.

(x1 + x2)/2, y1 + y2)/2 = 3+9/2 = 12/2 = 6 -1+2/2 = 1/2 = .05 This is what I got for the mid point. is this correct? I got 6 for the first set of numbers, and .05 for the second. How do I determine the mid point?

I think I figured it out. The answer can contain a fraction along with whole numbers. So i guess the mid point would be (6,.05) correct?

oops I misplaced the decimal. So yea (6,0.5) is the solution I came up with.

Now I will work on the distance and slope parts. Hopefully they will be correct to!

Why would you say it was 4? This is what I thought to.

Thanks!

So I solve for a=J/v*s to get the current (4.5*10^2/1.5*120). I hope I got this right and thanks very much.

Thanks!

it tell me who is related to who

do they ofer scholarships and grants for them as well

ok thanks

Light blue flame inside a Dark blue flame

Are you sure that is 3rd grade? I am a 4th grader and I don't know any thing about it. ps. When you are done with homework go to clubpegiun. It is really cool.

since it is equal probability you do add all three values and divide by three to get your answer

> greater than < less than

where did you get 140 from?

Got it. Thank you very much

a train left podunk and traveled north at 75 km/h. two hours later, another train left podunk and travled in the same direction at 100 km/h. how many hours had the first train traveled when the second train overtook it? can someone help set this up?

its a great story. its not an essay.

a)The planes ands axes of symmetry go through the faces, edges, and vertices of the octahedrons. b)There are 13 planes and axes of symmetry 3 go through opposite faces, 4 go through opposite vertices, 6 go through the midpoints of opposite edges c)The symmetry properties of cubes and regular octahedron are the same

It is a triangle. 9/3=3/1 which is a triangle.

A regular pentagon does not tessellate the plane if the vertices or edges do not meet. In tesselations all the edges and vertices meet.

just in general when I'm asked to sovle for X in a equation that is set to zero it's not really set to zero at all is it??? X^2 + 4X - 1 = 0 really what this is saying X^2 + 4X - 1 = dy right???

like i know i need the shares outstanding but am unsure of which one so could you please show me how to perform this calculation using the values on this website and what value exactly i'm suppose to use as there are many of the same name with like different variations i guess i don't know this is confusing

i meant that sant's final velocity will be zero when both their masses are the same by the way not both of them only santas will be zero when they have the same masses

this was the answer in the back book. I do not see how to get this though 5(x + 3)(x - 2)^2 (x + 1)

I'm wanting to take the arctan of this by the way can i simplify this or express this into more simpler terms

supposively the ansswer is 9.9 m/s and 4.9 m/s i do not see how to get these solutions

i did for some reason it changes it

well know it's posting it twice :O

Thanks for the help! And BTW, I am not switching my name.

It worked! :D

Is C just 9.8 N

wait no 12 N

hmmmmmm thanks

I like how Jishka adds random symbols to my posts lol awsome :O

zero

yes, it does! Thank you!

wait no the answer is A how though?

what do you mean by newspaper's op ed page?

In the essay, I have to demonstrate that I recognize logical fallacies, but I don't understand how I can write that much about a message of somebody else when they have written so little. there's just nothing else to speak of, and I only have 500 words

that's helps a whole lot! thanks so much Ms Sue and Writeacher! :D