Wednesday
July 23, 2014

Posts by serena


Total # Posts: 197

chemisty
Hi, I'm a 10th grade student and this is how I would look at it... So what is being oxidized is what is losing electrons. So take Copper for example. Copper is going from a 1+ charge to no charge as a solid...so is it gaining an electron or losing. Now think of Iron. Iron ...

Algebra
Hi, I'm a 10th grade student and this is how I think the problem would be solved... So let x = the amount you need to sell .03x = $420 + .02x .01x = $420 x = $42,000 So you would need to sell at least $42,000 in the first job be equal to the second job. Hope this helps!

Chemistry
Never mind, I figured out I needed to convert the moles to grams and then I would use the q = mc delta t.

Chemistry
The heat capacity of aluminum is 24.4 J/mol times degrees C. How much energy is released when 5.00 g Al is cooled from 50 degrees C to 30 degrees C. a) 2440 J b) 90 J c) 3.7 J d) 488 J I said A, but the answer sheet says that the answer is B. Can someone please explain how thi...

Chemistry
I know what I did wrong. Some reason I divided the moles of C10H8 by .0120 instead of .120, so my answer was 11 times the answer it should have been. Thank you very much!

Chemistry
I'm really confused on this question so if someone could show the steps and how to get the answer, that would be great. I understand that you would use delta T=Kbm, but don't know how to use the equation to find the answer. Thanks!! Calculate the boiling point of a sol...

Algebra 1
While playing a game, Rachel pulls two tiles out of a bag without looking and without replacing the first tile. The bag has two colors of tiles--black and white. There are 10 more white tiles than black tiles. a. Write and simplify an expression that represents the probability...

Algebra 1
the answer for a is x(x+10)/ (2x+10) (2x+9) the answer for b is 0.20

Chemistry
Ok, I think I get it. Thank you both very much!

Chemistry
I'm still a little bit unsure. The website didn't really specify why the ions disassociate with each other and associate with hydrogen bonding

Chemistry
So I am trying to understand in molecular terms the solubility of NaCl in water. So there are intramolecular forces that are mostly ionic between the ions, creating this partial positive, partial negative substance. And the intermolecular forces are also ionic. Ionic forces ar...

English
Dr. Seuss is an authorwhovis famous for his original and clever children's book

History
Both Hitler and Churchill were gifted orators. Compare their styles. I was thinking something like that they both used nationalism to make themselves popular within the people. And they spoke to create nationalism in their country. Does this make sense and also how do their st...

Math 10
Algebraically, determine the vertex form of a quadratic relation, if the vertex is at (-1, 2) and the point (1, -10) is on the parabola. Show all of your steps. I know that the formula is y=a(x-h)suared+ k but how do i apply these numbers to this formula? Thank you!

Math 10
Thanks alot guys! Both of your answers were very helpful.

Math 10
Hello, Is there easiest and simplest way to do this question? "A baseball is thrown from the top of a building and falls to the ground below. The height of the baseball above the ground is approximated by the relation h = -5t2 + 10t + 15, where h is the height above the g...

English
Never mind, I have received an answer to this, thank you

English
I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if the &quo...

Lit
Ok, I'll edit it. Thank you!

Lit
I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if the &quo...

Chemistry
Ok, makes sense. Thanks!

Chemistry
In a heating and cooling curve, I understand that the flat part means that the bonds are either forming or breaking, depending on if the input of energy is increasing or decreasing, but what is happening to the bonds in the slanted parts? Thanks!

Chemistry
I have discovered a new chemical compound with the formula A2B. If a saturated solution of A2B has a concentration of 4.35x10-4M. a) What is the concentration of B2- ions? b. What is the concentration of A1+ ions? c. What is the solubility product constant for A2B? Can you ple...

Chemistry
What number is the rate ?

Chemistry
Did anyone end up getting this. if you plug in the numbers above you still need the retain rate to find k. How do you do that??!!

Chemistry
An atmospheric scientist interested in how NO is converted into NO2 in urban atmospheres carries out two experiments to measure the rate of this reaction. The data are tabulated below. A: [NO]0 = 9.63 × 10-3 M, [O2]0 = 4.1 × 10-4 M t(s) 0/3.0/6.0/9.0/12.0 [O2] 4.1/...

Chemistry
Are cold alkalis the same as bases? If not, then what is the difference? Can you also give some examples if they are not the same? Thanks!

Title
Okay, thank you!

Title
Hi I need help thinking of a title for my graphic novel. It is about India and its exploitation of children. Could someone help me think of a cool title and an idea to make the title look unusual. Like maybe a bleed or something. Thanks!!

Algebra II
1. 4^x - 3(4^-x) = 8 I got where 4^x = 4 + square root (19), but I can't solve further. The answer is (log (4 + root (19)) ) / (log 4). 2. log (x^2) = (log x)^2 Solve for x Thanks!

Math
A rectangular box has a length of 12 inches and a width 4 inches. The length of the three-dimensional diagonal of the box is 14 inches. What is the height of the box?

Math
A rectangular box has a length of 12 inches and a width 4 inches. The length of the three-dimensional diagonal of the box is 14 inches. What is the height of the box?

Math
A 12-foot ladder is set up 5 feet from the base of a building. How far up the building does the ladder reach? Round your answer to the nearest tenth of a foot.

calc
If z = 2cis 60°, find z^4 in rectangular form.

math
Yes, you are right. Use distribution and multiply each number in the parenthesis aka the "10x" and "-12" by -3. So it would be 10x(times -3) - 12(times -3) -30x - -36 -30x + 36 Thats your answer. Hope this helps! Serena, a 10th grade student

Math
1. So you know that the slope intercept form is y=mx+b, right. And m is the slope. So in this case there is no straight out coefficient, but x is also equal to 1x. Therefore one is your slope. 2. So first bring -6 to the opposite side of the equation by adding 6 to each side. ...

Chemistry
Do pipettes blow up like balloons when they are heated. Why or why not?

Chemistry
Oh sorry. The actual question is... Explain what happens at the molecular level for something to dissolve.

Chemistry
How could 2 molecular compounds react to create a precipitate and an aqueous solution?

Math
If you are describing a graph that consists of a parabola and a line that intersect at two points, would the system be dependent and consistent. Or is dependent only used if the system has an infinite amount of solutions? Thanks!

Essay Title
Hi. I need help thinking of a title for the essay I am writing. The essay is about the Dominican Republic and Trujillo's regime. Specifically I am talking about how women who accept/deny female stereotypes accept/deny male domination. Can someone help me thing of a title. ...

college essay
Here's another one for editing papers. Your paper was well-written btw. Hope you make it in! I can't paste the link in so if you go to Paper Rater's website, that could help.

Math
So substitute one of the x values in x. For example, substitute -3 for x f(x)=-(-3)+4 f(x)=3+4 f(x)=7 Therefore one of the values for y is 7. Do that for the rest of the x values and you will get the answers. Hope this helps!

math
So first what you want to do it two put the numbers in order from least to greatest. 1, 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 7, 16 So to find the mode you want to see which number is listed the most. That would be 4. To find the median you want to find the middle number of this se...

Magic Thesis Statement
I am trying to argue that most weak women in the Dominican Republic during Trujillo's obeyed male domination. While the strong women would manipulate gender context to get what they want or to defy the power hierarchy.

Magic Thesis Statement
Hi! I'm writing an essay about how women act according to male or female domination. Could you please look at my magic thesis and tell me if my why is well written. Thanks! By examining the gender context during Trujillo's regime, one can see that some women who are we...

Math help please
Well for this problem what you would do is you would take each set of ordered pairs and substitute the x coordinate for x and the y coordinate for y. If for all 5 ordered pairs a function works, then that is your answer. For example take the first one. With the set of coordina...

Algebra 2 @ Steve
Ok. I get it. Thanks for your help.

Algebra 2 @ Steve
I have another question regarding functions, but instead if you are adding up functions that are in a radical. f(x) and g(x) are both square root of x+5. To find the domain of f+g, f-g, fg, and f/g, would I find the domain of each function...[-5,infinity)? And then what? How w...

Algebra 2
I am doing a similar problem where f(x) and g(x) are both square root of x+5. To find the domain of f+g and all that would I find the domain of each function...[-5,infinity). And then what? How would I add each set up?

Algebra 2
Ok, that makes sense. Thank you!

Algebra 2
So for any set of polynomials that are not in a radical, the domain will usually be all real?

Algebra 2
f(x) = x^2 + 2 g(x) = 2x^2 - 1 Find the domain of f+g, f-g, fg, and f/g Can someone please explain to me how you would do this problem?

maths
So for a triangle, two sides have to be greater than the largest side. Therefore, if you have three sides 7, 15, and x, you could say that... a) x is the largest b) 15 is the largest. a) If x is the largest side then 7+15 has to be greater than x. 22 has to be greater than x. ...

math
yup, they are all right. Good job.

math
9000

math
10,000

Math
No problem

Math
4x + 49 < 9 - x 5x + 49 < 9 5x < -40 x < -8

Algebra 1
No problem

Algebra 2
I understand how you get x to be -2, but I still don't get how y became 4

Algebra 2
If the point P is on the graph of a function f, find the corresponding point on the graph of a given function. P (0,5) y = f ( x + 2 ) - 1

Chemistry - is this correct?
Your electron configuration is right. b) Yes, there are 8 electrons in the highest energy sublevel. c) For part c I think it would be 10 because when you look at the last orbit, it includes both s-block and d-blocks. So when you include the electrons from 4s^2 and 3d^8, there ...

Algebra 2
Oh I get it!! Thanks.

Algebra 2
Can you please explain how to set up the equation? A city council is proposing a new skyline ordinance. It would require the setback S for any building from the residence to be a minimum of 100 feet, plus an additional 6 feet for each foot of height above 25 feet. Find a linea...

arithmetic
.45

language
gerund i think because the suffix -ing is a gerund

English
So if I changed it to... The hero displayed gallantry when he saved the woman. Is that better?

English
Can you please tell me if I use this word correctly? Gallantry: The hero was ready for the gallantry that came with saving the woman.

Turabian Citation
For citing using the Turabian or Chicago format, do you have to put a subscript and a footnote at the end of every sentence? If not, if you have two sentences that belong to the same source, would you put the footnote at the end of the second sentence like in-text citation?

Chemistry
Oh ok. That makes sense. Thank you!

Chemistry
When electrons get excited can they only move up one level or can they go up multiple orbitals, but just one at a time.

Simple English
Can you please rephrase this into words that are easier to understand? How might the scope of his criticism have been limited by his choice of forum? Thanks :)

Algebra
An asthma medicine is to be prepared from an elixir with a drug concentration of 5 mg/mL and a cherry flavored syrup that is to be added to hide the taste of the drug. How much of each must be used to prepare 100 mL of solution with a drug concentration of 2 mg/mL?

Chemistry
I have all that information, but I still don't understand how to do it. How would you find the constant. And what does the s^ -1 stand for?

Algebra
An asthma medicine is to be prepared from an elixir with a drug concentration of 5 mg/mL and a cherry flavored syrup that is to be added to hide the taste of the drug. How much of each must be used to prepare 100 mL of solution with a drug concentration of 2 mg/mL?

Algebra
Before the final exam, a student has test scores of 72, 80, 65, 78, and 60. If the final exam counts as one-third of the final grade, what score must the student recieve in order to have a final average of 76 percent? Thanks!!

Essay title
That's perfect!!! Thank you so much!!

Essay title
I really like the second one, but do you have any ideas to get rid of the first person?

Essay title
Hi. I'm trying to think of an essay title for an "I believe" essay. The essay is supposed to talk about how I defy the 'single story'. I talked about defying the single story of a teenage girl because I play the drums. My "I believe" statement i...

AP Euro
In The Revival of Antiquity by Jacob Burckhardt, Burckhardt talks about the humanists "It's active representatives became influential because they knew what the ancients knew." Please explain this quote and what Burckhardt meant.

Algebra
Can you please show step-by-step how to do this problem? (4x^2 - x +5)/ (x^2/3)

Math
(4x^2 - x +5)/ (x^2/3) Can you please show step-by-step how to do this problem?

AP Euro
Can you please explain this quote said by Pope Boniface VIII in the Unam Sanctum and who he was referring to? Was the Pope referring to Philip the Fair when he said this? "Therefore, of the one and only Church there is one body and one head, not two heads like a monster.....

Spanish
How would you say iPod in Spanish? Would you simply say iPod or would it be better to use electronic device?

MATH
So for this you would use the Pythagorean Theorm. The formula is a^2 + b^2 = c^2, where c is the hypotenuse of the triangle. So if you know that the ladder reaches the height of 12m, that would be the hypotenuse in the triangle. 5m would be one of the legs in the triangle. The...

Math
Oh. I understand. That makes a lot of sense. Thanks!!

Math
What is the factorization of... p^3 - 2p^2 -9p + 18?

Chemistry
Why does a pound of feathers float, but a pound of lead sink? Is it because of how dense each group is?

Algebra
That's alright then. Thank you very much.

Algebra
Well for the first one, the answer s supposed to be 1ã6xy/2y^2. The second problem's answer is xy/3 times the cubed root of 6y

Algebra
No. These two are both separate problems. The book asks to simplify each problem. And for the 2nd problem the index is a four.

Algebra
The squiggly A was originally a radical sign, but I guess it got changed.

Algebra
Hi. I need help on a couple of algebra problems. Can you please explain step by step how to do these? Thanks. ã(3x (whole thing has radical sign) ---- 2y^3 ^3(ã2x^4y^4) ------------ (the whole thing is cubed 9x

Grammar
Which sentence is grammatically correct? Most of the European population was peasants. or Most of the European population were peasants. Thanks!!!

History
Oh, ok. Thanks!

History
"He simply argued that the peddling of pardons like Colosseum souvenirs trivialized sin by debasing the contrition." Does this mean that by the Pope allowing indulgences society cares less about doing wrong?

European History
Ok. Thank you both!

European History
Can you please explain this quote? "The monarchy of Rome, as it is now, is a pestilence to Christendom." -Erasmus

European History
Oh. Ok. Sorry, I didn't check my previous question. Thank you!

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