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Lena

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NH4Br has been dissolved into 1 L of water at 25 degrees celcius. the solution has a pH of 5.16. calculate number of grams of
1. 3 answers
2. 1,665 views
Calculate the pH of 0.20 M NaCN solution.NaCN ---> Na+ + CN- CN- + H20+ ---> HCN+ + OH- Initial conc. of CN- = 0.20 mol/L change
1. 3 answers
2. 5,133 views
Methylaime, CH3NH2.If a 0.100 mol/L solution of methyamine has a pH of 11.80, calculate the ionization constant for the weak
1. 4 answers
2. 1,063 views
Calculate the [h3o+] and [oh-], pH and the percent dissociation for both 0.25 mol/L HCl and 0.25 mol/L HCN.0.25 mol/L HCL [H+] =
1. 5 answers
2. 563 views
I did an experiment were I added some water and KHP into a beaker and phenophalene [sp?]. It was a titration lab. We slowly
1. 5 answers
2. 693 views
If I were to use dichromate and add HCL and Ba(NO3)2 and NaOH , what should form?Im thinking the Ba(NO3)2 would still form a
1. 1 answer
2. 555 views
If I were to use dichromate and add HCL and Ba(NO3)2 and NaOH , what should form?Im thinking the Ba(NO3)2 would still form a
1. 3 answers
2. 731 views
What would happen if you reacted potassium dicarbonate with HCL and NaOH?
1. 4 answers
2. 343 views
One of my questions asks, when can you conclude about the relative equillibrium concentrations of CrO4^2- in each of the
1. 4 answers
2. 1,020 views
I don't understand the effect of temperature on a reaction. For exmaple:CO + 3H2 <-> CH4 + H2O deltaH= -230 KJ If there were an
1. 4 answers
2. 1,136 views
Initially, 1.68 mol of PCl5(g) and 0.36 mol of PCl3(g) are in mixed in a 2.00 l container. It is later found that 1.44 mol of
1. 8 answers
2. 1,305 views
0.500 mol of SO2, 0.100 mol of O2 and 0.700 mol of SO3 re intorduced simutaneously into a 1.00 L vessel at 1000 K. For the
1. 7 answers
2. 753 views
are radiocarbon dating and carbon-14 dating the same thing?
1. 1 answer
2. 587 views
I don't understand how Rutherford's gold foil experiment proved that the positive charge of the atom had a very small volume in
1. 2 answers
2. 724 views
There is this one question that akss for the sum of bond dipoles. I don't understand that at all. What is the question asking? I
1. 16 answers
2. 1,301 views
How do I know which part of a compund is negectivly charged and which side is positivly charged? In BH3 how would I know if the
1. 9 answers
2. 742 views
Is a C-H bond polar or non-polar?Is a C-Cl bond polar or non-polar? I have different sources giving me different ranges. One
1. 4 answers
2. 1,134 views
U have to show the partial charges and bond dipoles on my ;lewis structure of CH3ClFor the partial charges would I just have a
1. 5 answers
2. 832 views
What are some pros and cons for energy level diagrams and electron configuration diagrams?I was very long for elements like
1. 3 answers
2. 2,166 views
Is this a possible quantum number:3,2,2,-1/2 This is my thikning: n=3 so therefore l = 0-2 so therefore ml could = 2 However,
1. 2 answers
2. 279 views
What 4 quantum numbers describes one of the outermost electrons in a strontium atom in ground state?5,0,0,1/2 Is my answer
1. 2 answers
2. 4,992 views
Theres this one question in my homework that says that there is an unusual but actual condensed configuration and they said to
1. 6 answers
2. 407 views
I was asked to fraw the energy level diagram for carbon. Carbon has 6 electrons so would the 2s and 2p orbitals both be half
1. 8 answers
2. 1,219 views
A -> 3CThe molar mass of A is 10.0g/mol If 2.0 grams of A reacts, how many moles of C will be produced? A ------------------->
1. 2 answers
2. 504 views
Are the followinf true:atomic radii decreases from left to right, across a row atomic radii increases from top to bottom of a
1. 2 answers
2. 438 views
As a part of a study to see whther just the chloride ion on NaCl accelerates the rusting of iron, a student decided to see
1. 4 answers
2. 635 views
volume = 322 mLtemperature = 150 celcius pressure = 175 kPa mass = 0.448 Calculate the molar mass of the gas. First I converted
1. 2 answers
2. 656 views
A tank car containing concentrated HCL (molarity 12.1) derails and spills exactly 1500 L of acid. Solid potassium hydroxide is
1. 4 answers
2. 668 views
One of my questions asks me to find the volume of neon gas. I thought neon didn't attach with other atoms because it had a full
1. 2 answers
2. 494 views
How many moles of hydrogen and oxygen are in 2 moles of water?water: h2o # of molecules = (6.022 x 10^23)(2)= 1.2044 x 10^23 #
1. 3 answers
2. 1,270 views
Hg(CN)I don't know how to name this. I know that Hg is mercury and C is carbon and N is nitrogen.
1. 2 answers
2. 340 views
superscript:226element:Z subscript:29 Whats does the subscript and superscript represent?
1. 2 answers
2. 466 views
Does electron affintity increase from left to right on the periodic table?And are there any trends for the groups?
1. 2 answers
2. 418 views
I wanted to know how universities look at summer school courses. My guidance counseller told me that it dosen't matter whether
1. 3 answers
2. 666 views
After the PharmD program are you officially a pharmacist or is there more education you have to go through?
1. 5 answers
2. 431 views
We're learning something about transformations on the exponents of a function. For exmaple 2^x becomes 2^4(x-2)+2. Would this
1. 1 answer
2. 431 views
Whats that word that means like twisting a story; like making it more exciting than it is; something like that.
1. 2 answers
2. 500 views
how do you convert a p-t graph into a v-t graph?
1. 1 answer
2. 655 views
From what greek word did the word 'day' originate from (day as in a day of the week)? and what does that greek word mean in
1. 7 answers
2. 629 views
I don't think I am understanding this question.Question: A zoo started with 16 cranes and panned to hatch 20 chicks. A few birds
1. 2 answers
2. 893 views
From where in the greek language did the word Night originate from?
1. 1 answer
2. 711 views
What type of fuel does the cadillac cts take? premium or regular?
1. 2 answers
2. 490 views
I was wondering what the difference in current would be in one full extension cord versus several extension cords (which equal
1. 0 answers
2. 448 views
why does the total mechanical energy on a roller coaster stay the same?
1. 2 answers
2. 720 views
Would 'back uu plan' be considered slang in a formal essay?
1. 2 answers
2. 345 views
How would I use ellipses in Shakspearean quotes? I know that after every line you put a / but I want to omit like half a speech
1. 2 answers
2. 926 views
I talked about how love impairs the mind and doesn't allow much to make correct judgement. Are there any other disadvantages to
1. 2 answers
2. 500 views
I have three arguments in my introduction and I need a transitition to my first paragraph which is my first argument. I'm not
1. 6 answers
2. 533 views
What are some of the safety considerations and technologies used in designing a safe roller coaster ride?
1. 3 answers
2. 435 views
Would it be a bad idea to start a concluding paragraph with hence?
1. 4 answers
2. 466 views
How would I describe vanity as a verb. He is being ________.
1. 4 answers
2. 460 views
In my concluding paragraph of my essay I was thinking of doing this:In conclusion, it is evident that THESIS. I don't really
1. 2 answers
2. 1,407 views
I need to show proof in my essay as quote but would it be ok if I said something like "as illustrated" and not a direct quote
1. 2 answers
2. 780 views
In the film, Oh Brother Where Art Thou?, it is seen that Ulysses Everett is very self-conscious about the way his hair looks.
1. 7 answers
2. 479 views
I've completed all my body paragraphs and now I need to write my conclusion. However, I do not know how to start my conclusion.
1. 2 answers
2. 591 views
How does vanity bring forth someones downfall?
1. 2 answers
2. 342 views
How do you describe someone's personality? I need to write a very descriptive personailty on a character in a novel I am reading
1. 2 answers
2. 428 views
There's this one term that means that a person has seen something in the future.
1. 5 answers
2. 409 views
I'd doing a school project in which I have to write a psychiatrist report. I'm not too sure how to write one. Could someone
1. 5 answers
2. 476 views
My teacher said I need a transition sentance from my introductory paragraph to my body paragraph. I'm not too sure how to do
1. 21 answers
2. 1,305 views
What would I call someone who easily trusts people? I need to say that the fact that this person trusts people too easily,
1. 3 answers
2. 698 views
How would I upload an image from photobucket to a website using css? I would also like it centered, top of page, like a banner.
1. 0 answers
2. 506 views
What is a Narwhal's horn made out of?
1. 4 answers
2. 527 views
If I had something like:2x^2 + y^2 couldn I factor it into x^2 (x^2 + y^2)
1. 1 answer
2. 313 views
Im talking about the friction between a golf club and the air as the golf club is swinging towards the ball. how does the mass
1. 0 answers
2. 563 views
You have the most potential energy at the top of a hill. Where would you have the most kinetic energy?- I was thinking right
1. 1 answer
2. 685 views
We're learning about energy conservation and I need to realte it to a rollar coaster. I said that the rollar coaster has the
1. 1 answer
2. 419 views
I am writing a comparative essay and I am creating my introductory paragraph. Should I start it with my thesis?
1. 2 answers
2. 658 views
I need a more formal word or phrase for saying "beat up." My sentance is something like 'he beat him up' but i`m writing a
1. 2 answers
2. 797 views
A 200kg crate us pushed horizontally with a force of 700 N. If the coefficient of friction is 0.20, calculate the acceleratio of
1. 1 answer
2. 6,293 views
Two steel blocks are at rest on a frictionless horizontal surface. Block X has a mas of 3.0 kg ans is attacthed by means of a
1. 1 answer
2. 1,054 views
As a traffic light turns green, a waiting car starts with a constant acceleration of 6.0 m/s^2.At the instant the car begins to
1. 1 answer
2. 919 views
A blue car moving at constant speed of 10m/s passes a polic car that is at rest. The police car accelerates from rest at 4m/s^2
1. 2 answers
2. 1,063 views
You are driving 2500 Kg car at a constant speed of 14 m/s along an icy, but stright and lvel road. While approaching a traffic
1. 3 answers
2. 5,018 views
The average rate of acceleration for a breaking car was -12.2m/s2. If the car had a mass of 925 kg, find the frictional force
1. 2 answers
2. 757 views
You pushed a 1 kg box on floor where= 0.3. If the force you applied was 5 N, will the box move?m = 1kg u= 0.3 Fapp= 5 N Ff=
1. 2 answers
2. 668 views
Whats the difference between the formulas for kinetic and static friction.Kinetic: Ff= ukFn Static: Ff= usFn Are the 'f' and the
1. 4 answers
2. 646 views
I have a question about maximum energy and maximum entropy.How would you know whether the tendency towards maximum energy
1. 0 answers
2. 374 views
The function y = x becomes y= -2(3x+2)-5. Describe the order in which the transformations would take place.1. The function is
1. 2 answers
2. 1,033 views
suppose I started with the graph y=x^2if I were to stretch it by 0.8 would I right the equations as (0.8x)^2 or as 0.8x^2
1. 1 answer
2. 335 views
I need to know how much it would cost to build the following plants (as in factories):Solar energy plant Biomass plant
1. 2 answers
2. 736 views
NaOH + HCl ------> NaCl + HOHI need to figure out the quantity of heat in this reaction. The volume of the solution is 150 mL
1. 1 answer
2. 671 views
NaOH + HCl ---> NaCl + H2Ois that what would happen?
1. 3 answers
2. 592 views
how would I calculate the molar enthalpy for NaOH in KJ/mol
1. 1 answer
2. 408 views
NaOH (s) + H2O (l) -----> NaOH (aq)I`m having a hard time balancing this. Can you even balance this?
1. 2 answers
2. 883 views
NaOH +H2O -> ?would it just be NaOH (aq)
1. 4 answers
2. 453 views
How does mass affect the motion of objects falling freely under the influence of gravity?
1. 1 answer
2. 458 views
It can be said that acceleration is not affected by the mass of the object however velocity is. If you increase the distance at
1. 2 answers
2. 1,213 views
I`m trying to find acceleration and I've been given distance and velocity. How would I find acceleration? (distance is distance
1. 2 answers
2. 995 views
I`m trying to find acceleration and I've been given distance and velocity. How would I find acceleration? (distance is distance
1. 0 answers
2. 497 views
Why is acceleration the same for all free-falling objects regardless of mass and distance? Please don't say according to this
1. 4 answers
2. 527 views
How does mass effect a free falling object?I was thinking that if the mass is greater then object would have a higher
1. 4 answers
2. 1,074 views
I dropped an object from a certain height and gravity was acting on it. What type of motion is that and how do I know this?
1. 1 answer
2. 397 views
What would have a lower boiling point: alkanes or alkynes? Why?
1. 1 answer
2. 520 views
I did a ester lab not too long ago I was wondering why we submerged the ester in cold water before we started to waft the smell
1. 1 answer
2. 1,149 views
I did an experiment for creating an ester. So basically I added an acid to an alcohol. We were to also add H2SO4 solution. Why
1. 2 answers
2. 481 views
Let us assume that hate is the most strongest human emotion. Why is it so? (more of an opinion question)
1. 4 answers
2. 411 views
y = a(x - h)2(sqaured) + kWhere would I put a number in order to stretch or compress the graph vertically in the equation above?
1. 2 answers
2. 378 views
how would I do the elimination reaction of 2-chloropentane.When I figured it out I got the products as being 1-pentene and
1. 2 answers
2. 1,318 views
for the equation:propane + bromine how do I know on which carbon the Br would attatch itself to.
1. 2 answers
2. 593 views

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