Monday
July 28, 2014

Posts by anon


Total # Posts: 1,339

science
does anyone know any science revision games about mr mcluthon i need to use it for my revision but can`t find them . thanks

HISTORY
does anyone know any good sites about the spanish armada that explains it simply. i need to write an essay about why it failed and the reasons. thankyou for your help!

Electrochemistry
^ Sorry Dr.Bob222 on behalf of these people from UCI

year 7 science
what gas is made from hydrochloride and zinc? Is it zinc chloride? how to test for zinc chloride what experiment to do . thanks i`m stuck on these questions . not very good at science!

math
is 2tanx the same as tan2x?

english: critical thinking
1 hundo! with: 1.D 2.B 3.B 4.D 5.B 6.B 7.A 8.A 9.A 10.D

chemistry
6.Answer the following questions about BaC2O4 and its hydrate: A. calculate the mass percent of carbon in the hydrated form of the solid that has the fromula BaC2O4 * 3H2O

chemistry
5. DDT is an insecticide banned by the U.S Government because it is a hazard to fish, birds, and humans. 710 g of DDT is actually isolated in the reaction. the theoretical yield for this reaction was calculated to be 725 g. what is the percent yield for this reaction?

chemistry
4. Phosphorous trichloride, PCl3, reacts with water to form phosphorous acid, H3PO4, and hydrocholoric acid: PCl3+ 3H2O> H3PO3+3HCL a. what is the limiting reactant when 10.0g of PCl3 is mixed with 12.4 g of H2O? b.what mass of HCl is formed? C. how much excess reactant rem...

chemistry
3. How many grams of CaCO3 are required in the preparation of exactly 73.5 g of CO2? ---CaCO3> ---CaO + ---CO2

chemistry urgent!!!
2. When exactly 61.9 g of silver nitrate react with magnesium, how many grams of Ag are prepared? Balanced equation:

Chemistry
Please Help me with my chemistry Review I have a test tommorow? Please help me with my review my test average is low and i need at least a b to pass the class for the six weeks I am freaking out!!!! I care more about showing work i dont want answers I just want help on how to ...

Physics
You have been asked to keep a 35.1 kilogram crate from sliding down a 50.03° incline. The coefficient of friction between the crate and the incline is 0.26, and it's on the surface of Mars (gravitational acceleration at the surface of Mars is 3.75 m/s^2). How much forc...

Physics
A vacant, 1560 kg car begins from rest and rolls 46 meters down an inclined plateau before rolling off the edge and crashing into the sea below. The plateau is at a constant downward angle of 12.4 degrees with the horizontal. The coefficient of rolling friction between the car...

biology
how do the proteins in tonoplast membranes protect against vacuole rupture????

chemistry - quant.
I need help calculating the pH of a solution that is .0400M Na3AsO4 I was trying to calculate the pH with [H30+]=sqrt(ka1*ka2) What is the correct way to calculate this? Thankyou

History
How did J.F.K influence america?

history - 20th century
keep the ideas coming guys

history - 20th century
can i ahve some suggestions oif events in the 20th century?i can do a history topic(yawn) of anything at all from the 20th century. i know like the world wars,but what about more interesting sutff like mc hammer,tupac killed?

Greek Literature
In which work did Aegisthus kill Atreus? I think it's "House of Atreus" by Aeschylus but I'm not sure exactly what that is. Is it part of Oresteia??

Biology/General
Why do sweet and greasy foods taste so good to us? What are some properties of DNA that make it well-suited for storage of genetic information? Why does eating excess carbohydrates cause you to gain fat? The Irish survived for generations by eating potatoes as their main food ...

Physics
A rock is thrown vertically with a velocity of 21 m/s from the edge of a bridge 41 m above the river. How long does the rock stay in the air? V = 21 m/s d = 41 m a = -9.80 m/s^2 t = ?

Physics
d = Vf^2/2a d = -68.5/(2 x -9.80) d = 3.495 and this answer is being marked incorrect. Am i doing something wrong.

Physics
A weather balloon is floating at a constant height above Earth when it releases a pack of instruments. If the pack hits the ground with a velocity of -68.5 m/s, how far does the pack fall? a = -9.80 m/s^2 Vf = -68.5 m/s d = ?

Physics
35 - (.9)(-10.0) = 44 V = 29.664 and this is incorrect Do I use the acceleration for the velocity or do I figure out the velocity from the informatin given?

Critical Thinking
hay mark, if you are so smart on the subject, why are you in this site??????

Physics
n_1/(n_2)^2

science
what is produced when copper sulphate solution is mixed with ammonia solution? Either copper(II) hydroxide or copper(II) ammine sulfate or both depending upon the strength and the amount of ammonia added. The first is Cu(OH)2, the second is Cu(NH3)4SO4

science and history
How did the apollo 11 space mission pave a way for 1.) technology 2.) science 3.) America 4.) space exploration Please note that we don't do students' homework for them. Once you have come up with a response to these questions, please re-post and let us know what you t...

MATH
Multiplying Equation 1 by -1 you get: -x-y=-5 Adding that to equation 2 you get: -x -y = -5 + x -2y = -4 ------------------- -3y = -9 Divide both sides by -3 and you get y=3 Put that back into either equation and you can solve for x x+y=5 x+3=5 x+3-3=5-3 x=2 So x=2, y=3 should...

the big idea of energy
Imahh doinn thee Journey of a Cheese Sandwich homework and I havv no idea what it means by The Big Idea of Particles or The Big Idea of Energy. I've looked on the web but I keep getting confused. HELP! :S

the big idea of energy
OMG guys, i thought it was just our stupid school that did the esr defenders thing!! what on earth is THAT all about?!?!

the big idea of energy
i get da big idea of energy but nothin else 2 do wit ma hw! magnesium burning!

the big idea of energy
Are you guys stupid? Nobody cares if you don't know. You don't need 50 differant people saying "I don't know this. I don't know that". This is basic science and you people can't understand. I suggest you get serious help. Presto! Vamos! Rapido!

the big idea of energy
i have to do an assesment about sound. i have to include the big idea of energy. i have no clue what it is! HHEELLPP MMEE!! What do you mean when you say "the big idea of energy"? I know that sound is created by vibrations, but I'm not sure thats exactly what you...

acids and alkalis
Tea and chalk acid and alkali

English
I'm writing an essay on the book "A clockwork Orange". I'm not sure wut my research question or topic will be. It'll probably revolve around the analysis of the characteristic of the main character Alex. I'll be talking about the good and evil in him ...

Stoichiometry problem
I know I wont be ever needing chemistry in my future career!...

WORD PROCESSING AND KEYBOARDING
You wont regret it 1:C 2:A 3:B 4:A 5:C 6:D 7:D 8:B 9:A 10:C 11:B 12:C 13:D 14:D 15:A 16:D 17:B 18:A 19:B 20:C

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