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Posts by lena

Total # Posts: 1,041

Chemistry
Thanks Dr. Bob :)

Chemistry
0.27 - actual value of AlCl2 1.1173 - theoritical value of Alcl2 % Error = [(0.27-1.1173)/1.1173] * 100 = -76 % What are some reasons for the -76% error. I thought of 2 but i`m not sure if they're right. - we spilled some of the AlCl2 while the reaction was taking place - ...

Chemistry
Thanks so much !

Chemistry
For my theortical yield I got 1.1173 g For my actual yield I got 0.27 g I need to find my percent yield and percent error. Did I do this right? % Yield = (0.27/1.1173) * 100 = 24 % % Error = [(0.27-1.1173)/1.1173] * 100 = -76 %

Chemistry
Thanks :)

Chemistry
What does a negetive percentage error mean?

Geometry(Very Urgent!!!)
Since it's an equilaternal triangle you know that all angles are the same. So each angle is 60 degrees. 5x-2y = x+2y 5x-x = 2y +2y 4x=4y x=y so now you can use either equation 60= 5x - 2x 60= 3x 20 = x

Chemistry
If it was broken into 2 different questions. number one being find the limiting reagant and number 2 being find the theoritical yield of AlCl2 would it still be 1 significant digit?

Chemistry
I did a lab where I put Copper (II) Chloride in water with Alumnim. 2Al + 3CuCl2 -> 3Cu + 2AlCl3 The aluminum on the reactant side weighs 0.5 g and the CuClw weighs 1.69 grams. It said to find the theoricital yield. Did I do this right? 2Al + 3CuCl2 -> 3Cu + 2AlCl3 # of ...

Genetics
What are three sources of emobroyonic stem cells and how are they obtained from each? This is what I have so far: 1. Blasocyst of an embyro 2. Embilical cord of a baby 3. ? I don't understand how to explain how to obtain them. Don't you just remove them?

Genetics
Whats a homolog?

Stem Cells
Are adult stem cells found only in adults human beings or all human beings regardless of age?

BIO
Thanks so much :)

BIO
is it because in order for there to be a boy the dad would have to give a y because a mom can only give x and since the y is domiannt it would always express the trait>?

BIO
heres the question, I totally don't understand it: a few sex linked ttraits in humans are located on the Y chromosome and are dominant. What pattern of inheritence would uou expect to see in these traits? show your exmaplantion.

math
how do i solve systems of three equations with elimination??

law
what should someone do after being sexually assulted?

Law
thank you

Law
Why do people commit sexual assult? This is what I have so far: - for power or control - women-haters - have been assulted in the past could you tell me some more pls.

science
I put a peice of copper into a flame and I need to write a word equation for it. Whats a flame made up of cause I wanna write copper + _____ -> _______ + ________ I know its a synthesis reaction.

science
which would have the greatest ionization energy potassium ion, chlorine ion,or argon atom?

Science
Thanks DrBob :)

Science
road salt has been dropped on grass. keep osmosis in mind, what would happen? answer: since the road salt is hypertonic solution and therefore the water in the grass would diffuse into the road salt thus causing the grass to die. Is this right? What should I add?

last question sci. :)
road salt has been dropped on grass. keep osmosis in mind, what would happen? answer: since the road salt is hypertonic solution and therefore the water in the grass would diffuse into the road salt thus causing the grass to die. Is this right? What should I add?

biochem.
why is it important for the intravenous fluids to have the same solute concentration as your blood? Answer: If the intravenous fluids did not have the same solute concentration, then the red blood cells would shrink, if the intravenous fluids were hypertonic or they would ...

science
why is it important for the intravenous fluids to have the same solute concentration as your blood? Answer: If the intravenous fluids did not have the same solute concentration, then the red blood cells would shrink, if the intravenous fluids were hypertonic or they would ...

science
ok works for me thank you :)

science
so would it be better to place a wilted flower in tap water or distilled water? Answer: I would say distilled water because it contains a lower cocnentration of solute than the flower and therefore the water would more easily diffuse into the flower. Tap water contains things ...

SCI
both of these sites say use either distilled water or tap water. :S But i`m trying to figure out which is best.

SCI
so would it be better to place a wilted flower in tap water or distilled water? Answer: I would say distilled water because it contains a lower cocnentration of solute than the flower and therefore the water would more easily diffuse into the flower. Tap water contains things ...

SCI
ok I understand thank you :)

SCI
Hypothetically speaking, I placed a cell in a glass of water and after about a day the cell grew in size. Why did the cell grow? Well I was thinking this: The reason the cell grew was because there was a higher concentration of water outside of the cell and therefore -in order...

sci.
Thank you so much. I finally understand this. :)

sci.
I`m so confused about osmosis right now. If you place a cell in a hypertonic solute then wouldn`t the water go into the cell since they`re trying to acheive equilibrium?

bob -sci.
keeping osmosis in mind, would it be better to soak wilted flowers in distilled water or normal tap water? I was thinking tap but I`m not sure why I`m thinking that. Maybe because tap water has a higher solute concentration that than distilled. i`m not sure. could you explain ...

sci.
keeping osmosis in mind, would it be better to soak wilted flowers in distilled water or normal tap water? I was thinking tap but I`m not sure why I`m thinking that. Maybe because tap water has a higher solute concentration that than distilled. i`m not sure. could you explain ...

science
Thanks Dr. Bob :)

science
when you eat to much, like more than your need, the mitochondria in your liver makes triglycerides to store the excess. Why is that storagge important? :S

Bio
What are the similarities and differences between fatty acids and polysaccharides?

Sci
Thanks You :)

Sci
Thank you so much :)

Sci
What are the 5 signs that show a chemical change has taken place? I wrote: - theres a smell of ordur - change in color - fizzing or bubbling - percipitate forms - difficult to reverse Could you name a couple more please and tell me if those are right. Thank you.

science
try typing something like: dangers of carbon dioxide to human health into a search engine

science
- Asphyxiation. Caused by the release of carbon dioxide in a confined or unventilated area. This can lower the concentration of oxygen to a level that is immediately dangerous for human health. - Frostbite. Solid carbon dioxide is always below -78 oC at regular atmospheric ...

science
natural sources: - burning of fossil fuels - volcanic eruptions - decay of plant and animal matter - resperation

Sci
blood

Sci
What would happen if our pH levels increased?

Chemistry/pH- Weak Acid
where did you get c = 1.00x10^-2 = 0.0100 M from ?

English
Thanks so much Ms. Sue. I finally understand the purpose of semi-colons.

English
Oh O.K Thanks Ms. Sue May I ask when a semi-colon should be used?

English
I have another question. Should I use : or ;

English
Thanks so much GuruBlue

English
Flamenco can be further divided into four more categories; Flamenco singers, Flamenco dancers, Flamenco guitarists and Flamenco Bands. Should there be something else in place of the semi-colon? What I mean is, is there something better I can put there. I`m not quite sure when ...

math/science
"calculate the volume of 5g of a substance with a density of 6g/mL. SHOW ALL WORK" I just can't figure it out. D=M/V. But if you're making both sides equal? If someone could just explain. Because at first I thought it was 8.3, then 5/30, and I'm not ...

Shakespeare
Thanks so much Ms. Sue =)

Shakespeare
In the Globe Theatre (the very first one), where were the 'poor spectators' accomadated and where were the 'rich'? I think the poor may have been the ones standing in 'the pit' but i`m not too sure.

chemistry
I would like to comment on the acidity of sofdrinks. Coke & Pepsi - 3.4 pH Coke and Pepsi are very acidic and most people know that if you place a tooth in coke or pepsi that it will dissolve (eventually). Therefore BLOOD seems most suitable if you were to chose of of the ...

chemistry
Blood

English
Thanks =)

English
`m writing a bio-poem. Is what I wrote below gramaticcaly correct? I`m not sure if the second part makes sense, the gallows part. Who feels that he has been robbed of his faith in God and fellow human beings, exposed to the deepest inhumanity and that life has becomes as black...

English
Does this make sense? Who fears that liberty has gone extinct, his family will cease to exist and that God is hanging from a gallows

English
I`m writing a bio-poem. Is what I wrote below (just one part in the poem) gramaticcaly correct? Who feels that he has been robbed of his faith in God and fellow human beings, exposed to the deepest inhumanity and that life has becomes as black as ‘Night’

History
Thanks a lot =) This really helped

History
What are some adjectives that could be used to describe the survivors of the Holocaust? - brave have any more?

English; grammar
Thanks so much Ms. Sue.

English; grammar
Could you please tell me if I have properly identified the part of speech of each word. If I have made a mistake, could you please correct me. - Word: femurs Sentance:Jawbones, hipbones, femurs. Part of Speech:NOUN Word: Apache Sentance: White smoke puffed like Apache signals ...

chemistry
-2144kj

English
I need to think of an exciting title for a newspaper article about a mad-dog. Could you help by giving me some words that might grab a reader's attention?

English TKAM
Thank You =)

English TKAM
In the novel, "To Kill A Mockingbird," when did the courtroom scene take place? (time during the novel) Like what month and year

Mythology
Thanks so much

Mythology
The goddess Astrea is often depicted holding what? I need it to be one or more of the following options: Scale Sword Blindfold *** if you have anything else to add please do so Thanks in advance =)

Computer Science
var row,column: int randint (row,3,10) randint (column,10,30) locate (row,column) put " ".. ?? i`m actually very new at this so i`m very confused

Computer Science
how would you write that? (I don`t have the program with me)

Computer Science
In the program Turing, how would you move an box randomly around the screen. This is what I have so far: for row: 3..10 for column: 10..30 locate (row,column) put " ".. end for I think this creates a box. How would I move this box across the screen by only using ...

vocab
I thought he was "counting his chikens" what does the phrase in quotes mean. It`s not meant to be literal

vocab
thanks so much :]

vocab
what does this statement mean; questioning the verdict ??

History
During which battle did Guru Gobind Singh Ji say, "sava lakh se ek laraoon, tabe Gobind Singh naam kahaoon"?

English
What does the following saying mean an elbow only bends one way ??

Simple Grammar
Hmm That makes sense Thanks so much =)

Simple Grammar
She was dressed in red robes with a metal crown on her head, and paraded through the streets in a wooden cart pulled by a donkey festooned in red bunting. Is festooned a noun?

Simple Grammar
Thanks =)

Simple Grammar
She is headstrong In this sentance, is headstrong an adjective?

English
Thanks =)

English
whats the word that means your not lying but not telling the truth. like not telling the whole truth

English`
thanks so much that word will work well =)

English`
Whats one word that means someone that in not knowing something?

English
What does diction mean? I looked it up but i`m not understanding what i`m suppose to do when the question says how the author make the story beleivable through diction?

English/History
Thanks So Much Ms.Sue

English/History
Was there something happening with women during the 1900s? i`m thinking like they were saying that they could do anything men could do. Some special event that took place?

Word
That is a very good example. Thanks so much =)

Word
Umm I`m not quite sure what zeal means like if someone were to say I had no zeal to live what would that mean? that dosen`t make much sense to me

English
thanks =)

English
how do you properly quote a fammous quote

English
thanks so much (:

English
This is a part I wrote before I knew exactly what I wanted to become. I wanted to be a doctor. I wanted to help save peoples lives on a daily basis. What better feeling than to know you just saved someone from inches from death? You see, I had a dream. Should the you see come ...

English
would this be a proper way to start a sentance: You see like for example You see, I had a dream.

English
OK Thanks Guru Blue & Ms.Sue You helped a lot =)

English
like forever meaning never ending ( billions of years ) does that clarify?

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