Wednesday
August 5, 2015

Posts by christina


Total # Posts: 870

Chemistry
Name the following compound? FeCl3 x 6H2O
November 12, 2009

Chemistry
True or false? Hydrogen bonds between water molecules are comparable in strength to hydrogen-carbon covalent bonds?
November 12, 2009

Chemistry
6000 calories?
November 10, 2009

Chemistry
Calculate the amount of heat (in calories) required to raise the temperature of 200g of water from 20C to 50C. The specific heat of water is 1.00 cal/g. I have done other spacific heat problems but on this one i don't know how to start...
November 10, 2009

Information Technology
In the second column, list at least three processes (capabilities) necessary to keep track of your home CD or DVD collection. In the first column, identify the input data required for each of the processes. In the last column, identify a logical name for each output data item ...
November 10, 2009

Chemistry
On a melting curve, the heat energy represented by the horizontal portion of the curve is called what?
November 9, 2009

Chemistry
Are the melting point and freezing point of a substance represented by the same number?
November 9, 2009

Chemistry
1.41 L of H2?
November 9, 2009

Chemistry
785torr(V)= 0.35mol(62.36L)(273K) answer: 7.6 L is this correct? i am not sure that the R(62.36L) is what is supposed to be there.
November 9, 2009

Chemistry
A 0.35 mol sample of an ideal gas is held in a vessel at 0.C and a pressure of 785 torr. What is the volume of the vessel? (R=62.36L x torr/mol x K)
November 9, 2009

Chemistry
How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid: Zn + 2HCl -> ZnCl2 + H2
November 9, 2009

math
what is 15% of 250,000$
November 7, 2009

Science
where can i find a good site that will show me the change's of the earth's atmosphere?
November 5, 2009

Chemistry
The problem is i dont know how to do it....i dont know how to seperate the ions that are solubale.....
November 3, 2009

Chemistry
Another ionic and net ionic equation that i am having trouble with!!! I need the ionic and net ionic equation KOH+ HBr -> KBr+ H2O
November 3, 2009

Chemistry
What is the ionic and net ionic equation? Ca(HO)2(aq)+ Na2CO3(aq)-> CaCO3 -> (s)+ 2NaOH (aq) I dont understand why there are two arrows? This is what i have so far... Ca+2OH+Na2(aq)+CO3(aq)...
November 3, 2009

Chemistry
What is the ionic and net ionic equation for Na2CO3 + 2 HNO3 -> 2 NaNO3 + H2O + CO2 (g) This is what i have so far... Na2(aq)+CO3+H+NO3 -> Na+ NO3+ H2O(l)+CO2(g)... i don't know what to do!!!
November 3, 2009

Chemistry
oops.... wrong problem... answer.. 16 Mol HCl/1 Mol Cl2 x 36.458g HCl/1 Mol Cl2 = 583.328g HCl
November 1, 2009

Chemistry
1 mol C2H2/26.036g C2H2 x 16 mol HCl/1 mol Cl2 x 64.1gCaC2/1 mol CaC2 My answer = 583.328g HCl?
November 1, 2009

Chemistry
DrBob222... I really dont know where to begin.. One Mole of Cl2 gas is 70.9g I have done mass to mass conversions but the mole ini the problem is giving me trouble!!!
November 1, 2009

Chemistry
Chlorine gas may be easily prepared in the lab according to the reaction: 2KMnO4(s)+ 16HCl(aq)-> 2 MnCl2(aq)+5Cl2(g)+ 8H2O(l)+ 2KCl(aq) What mass of HCl is needed to prepare 1 mole of Cl2 gas?
November 1, 2009

Chemistry
Some drain cleaners contain a mixture of sodium hydroxide and aluminum which reacts with water as follows: 2Al(s)+2 NaOH(aq)+6H2O(l)->2Na[Al(OH)4](aq)+3H2(g) What mass of hydrogen gas can be produced when 5g Al reacts with sufficient NaOH and H2O) according to the above ...
November 1, 2009

chem engineering
Mass balance on an intravenous injection (IV) bag A nurse sets up an IV drip for a patient consisting of normal saline; assume that this is an aqueous solution containing 150mM salt. The saline drip is supplemented with an antibiotic solution; assume that this is an aqueous ...
October 28, 2009

Math
Make up a set of at least twelve numbers tahtn have the following landmarks. Maximum:8 Range:6 Mode:6 Median:5
October 26, 2009

7th grade
what is the antonym for legacy
October 23, 2009

economics
If tbone steak cost 12.00 a lb and 1st util is 48, 2nd is 42, and 3rd util is 36 and we also buy ground round at 4.00 a lb and we derive 24 utils for the 1st lb, 16 for the second and 12 for the third and all we have to spend is 40.00 then how many lbs. of t-bone and ground ...
October 19, 2009

math
y-3=11
October 11, 2009

college
Electro-Rad Inc., a developer of radiology equipment, has stock outstanding as follows: 50,000 shares of 2%, preferred stock of $50 par, and 100,000 shares of $25 par common. During its first four years of operations, the following amounts were distributed as dividens: first ...
September 24, 2009

math
if there are 30 students in a class and 39 candys in a pack how many packs of candy do you have to buy so that there will be no left overs (hint us lowest common mutilple
September 20, 2009

Ofiice administration
To what?
September 18, 2009

Algebra
how do you turn a decimal to fractions and percents? like .6 or .001 also how do you turn 2.85% into fraction and decimal?
September 14, 2009

Physics1
i think -3.11
September 12, 2009

Physical Science
If you were to expend 10 Joules of work to push a 1-coulomb charge against an electric field, what would be its voltage with respect to its voltage in its starting position? When released, what will be its kinetic energy if it flies past its starting position?
September 9, 2009

college/earth science
if unsaturated air at 23 degree celsius were to rise, what would its temperature be at 500 meters?
September 5, 2009

Science
What is Scientific Principle?
September 2, 2009

Chemistry
Thank You so much!, GK!
September 2, 2009

Chemistry
Of what value is knowledge of density to a chemist?
September 2, 2009

English
How would I summarize this news article
August 27, 2009

college
How would I summarize this Article "Lawyers war over job tax" Lawyers on both sides of the Jeff. County occupational tax case say they have a right to $17.5 million of job revenue being held in escrow and on Wednesday tok step to gain access to the money. In court ...
August 21, 2009

math
Heidi has a brown pair and a gray paper of slacks a brown blouse, yellow blouse and a white blouse and a blue sweater and a white sweater how many different outfits does she have if each outfit she wears consists of slacks a blouse and a sweater?
August 20, 2009

5th grade math
Round to the greatest place of the lesser number. 3861+647
August 18, 2009

Geometry
Well you see bobpursley I have this four options.. 1. 1.14mg 2. 0.014mg 3. 140mg 4. 14mg But since Milligram is about the mass of one human hair, then I'm assuming a button is 140mg am I correct?
August 18, 2009

Geometry
I'm curious about this question can someone please help me out. what is the unit measure of a button in mg?
August 18, 2009

social studies
A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when
August 16, 2009

Alegebra 1
HELP PLEASE!! Show that Euler’s formula holds for the polyhedra called a right pentagonal prism?
August 14, 2009

Geometry
I'm really stuck with this question can someone please help me. A bus is scheduled to stop at a certain bus stop every 45 minutes. At the end of the day, buses still stop after every 45 minutes, but because delays often occur earlier in the day, the bus is never earlyand ...
August 8, 2009

math
If L is the lenth of an arc, r is the radius and degree is the angle subtended by the arc, find the angle when l=9.4cm r=4.5cm
August 5, 2009

MATH
Admission to a museum is $10 for each adult and $5 for each child. If a group oh 30 people pays a total of $175 in admission how many adults are in the group?
July 13, 2009

MATH
Three integers have a sum of 7 and a product of 0. If the difference of the greatest number and the least number is 11, then the least of these numbers is?
July 13, 2009

MATH
chris buys a chocolate bar and a pack of gum for 1.75 if the chocolate bar costs .25 more than the pack of gum how much does the pack of gum costs?
July 13, 2009

9th grade biology
How does binomial monenclature relate to Genus and species? Also, what is the proper form for the scientific name of an organism?
May 18, 2009

Algebra
ok it says 1-x=y and then a graph its equations
May 5, 2009

2
what relationship factors or considerations might be influencing michael's problems?
May 1, 2009

algebra 2
how do you expand the power of a binomal in (x+3)^4
April 22, 2009

Algebra 2
how do you do permutations??? distinguishable ex. Sweetwater would you put the total number of the letters on top and then put what is repeated on bottom???
April 22, 2009

Algebra 2
so it would be division then i would have to cross multiply right??? by the way thank you...Alot!
April 22, 2009

Algebra 2
If P(a)=1/5, P(A and B)= 1/8, what is P(b/a) i dont get it is it the same way as finding p or b or is it something entirely different and how do you find it
April 22, 2009

5th grade
plug in the numbers for x and y into the multiple choice and see which one works ex. y=1 and x=-3 1=2(-3)-5 does that work ...no so try it on a different choice
April 22, 2009

Algebra2
IF P(A)=40%,P(A OR B)=60%,P(A AND B)=30% WHAT IS P(B)
April 22, 2009

Chemistry
the answer is 3
April 12, 2009

Math
Okay i stuck on a problem can anyone help? There are 14 people total.7 are girls a day.Everyone has to work for 7 days also everyone has to have 2 days off.So how many days does a girl work a week?
April 10, 2009

english
i was just wondering does this song lyric have a metaphor? The stars will cry The blackest tears tonight And this is the moment that I live for I can smell the ocean air And here I am Pouring my heart onto these rooftops Just a ghost to the world That's exactly Exactly ...
March 31, 2009

business
Identify and explain how the four steps to change the mental models/mindsets can help General Motors. The four steps are recognizing, test, overcome, and transform GM’s mental model/mindset: GMs management is pushing electric vehicle technology I am having trouble ...
March 29, 2009

kindergarten
try clapping and saying the word grand-mo-ther
March 27, 2009

world geo.
Thank you so much. The sites helped me a lot.
March 23, 2009

world geo.
Hi can anybody help me with some websites leading to interesting facts about mt everest. For example its history,the culture,first women to climb.etc. Thank you.
March 23, 2009

world geo.
what is the root of the conflict between the israelis and the palestinians? also... describe the role of three of the following people had in the conflict: yasser arafat, manchem begin, anwar sadat, jimmy carter,yitzhak rabin,bill clinton,shimon peres,benjamin netanyahu,ehud ...
March 12, 2009

math
what number is 24% of 95. Sorry but i dont understand how to get numbers using percents. another problem im stuck with is what percent of 90 is 60
February 26, 2009

Algebra
I am thinking of a number.It is a multiple of 3 but not 6.It is greater than 25^2 but less than 30^2.The units digit is a perfect square and the sum of the other two digits is the square root of 81. What is my number? A three-dimensional model of a city has a scale of 1 inches...
February 12, 2009

205 ctr
It’s disgraceful that a member of the Elks Lodge would go out to fast food restaurants every night. The Elks believe in family values, including home-cooked meals.
February 12, 2009

history-renaissance/middle ages
How were women viewed in the medieval times? What would medieval men have said about Petrarch's (poet) view on women? thanks!
February 8, 2009

Math
9
February 8, 2009

physics
two pellets each with a charge of 1 microcoulomb 10 to the negative 6 c are located 3 cm apart what is the electrical force between them what would be the mass of a object that would experience the same force in the earths gradational field
February 2, 2009

physics
two pellets each with a charge of 1 microcoulomb 10 to the negative 6 c are located 3 cm apart what is the electrical force between them what would be the mass of a object that would experience the same force in the earths gradational field
February 2, 2009

english
what rhetorical techniques/devices are used in "a talk to teachers" by james badwin?
January 17, 2009

Simile & Hyperbole
hes hotter than the sun
January 15, 2009

math
(2x)(-3y)(2z)
January 13, 2009

Algebra
I need help factoring 64b^2-(q+r)^2
January 2, 2009

math
what do you mean? i need to write it down as an equation
December 10, 2008

math
write the verbal sentence as an equation. twelve less than -9 times a number is equal to 8 minus 4 times the number
December 10, 2008

math
i mean write as an equation.
December 10, 2008

math
twelve less than -9 times a number is equal to 8 minus 4 times the number
December 10, 2008

math
write the verbal sentence as an equation.then solve the equation Three less than 11 times a number is equal to 9 plus 5 times the number. twelve less than -9 times a number is equal to 8 minus 4 times the number
December 10, 2008

spanish
im really confused on the difference between conocer and saber. can anyone help?? 1. Quiero viajar mucho y (conocer/saber) los paises del mundo. 2. el (conoce/sabe) como viajar dentro de Espana. 3. El tambien (conoce/sabe) muy bien no solo Sevilla sino tambien otras ciudades ...
December 7, 2008

spanish due in 2 hrs
number one means for what do you use ipods? not how long. and conjugate usar. so it would be yo uso los ipods por.... etc. 2. it means for how many hours do you study for a math exam. it would be yo estudio por cinco horas para una examen de matematicas. hope this helps
December 3, 2008

spanish
what does this mean in english? and would it be true or false? sorry this is the only one i do not understand. unos temas comunes para el noticiero son como preparar platos exquisitos, como viven las estrellas de cine y como aprender a pintar.
December 3, 2008

english/photography
i have three photographs, one of a soccer ball, one of cd's, one of books, and one of boxes and chaos. i have to write one sentence that connects them all and tells about my life but it cant be really cliche and concrete.. i cant think of anything that isn't concrete. ...
November 24, 2008

history again
one more question.i have to compare the class structure of japan and europe during feudalism. Europe was royals, nobility,manor lords, and serfs right? What was Japan? and am i leaving anything out of the Europe one? thank you!
November 19, 2008

English
no loitering= do not loiter here no sledding= do not sled here no hunting= do not hunt here no entering= do not enter no drinking= do not drink no touching= do not touch no photography= do not take pictures? no climbing= do not climb here no dogs= do not allow dogs here theres...
November 19, 2008

history
What is the relationship between the ruling class and warrior class in Japan and Europe? I know that in Japan the Samurais were the warrior and ruling class till the Edo period right? but what about Europe?
November 19, 2008

photography
i have to take a roll of film for photography on things that represent me or a "self portrait" project. the problem is, it gets dark outside really soon after i get out of school so it is dark and i am moving in two days so most of my house is packed up. any ideas on...
November 18, 2008

spanish
does this make sense and is the grammar right? it is trying to say : last weekend i went ice skating at queens in kensington with my friends. i celebrated my 16th birthday and it was very fun. i enjoyed it with my friends and family all weekend. i recieved many gifts and ate a...
November 10, 2008

spanish
im a little confused on this.. does - que almorzaste ayer- mean what did you have for lunch yesterday? or did you have lunch yesterday.. and does this mean who did you eat lunch with- con quien almorzaste?and what does this mean- la ultima vez que fuiste al cine, quien pago? y...
November 4, 2008

psy 230
I have to agree with all of you. I do not understand my text book at all. Im also like all of you, am getting good grades in all my other classes and even in my Psy 265 class but I'm carrying a C+ in this class. The teacher isn't any help either.
October 30, 2008

Math
solve 4x^2=12
October 30, 2008

roman history
i have to make a diary of a roman farmer in the time zone of 100-300 CE. i need three days in this diary and an interesting incident or event in his life. im stuck any ideas on an event or anything?? thanks so much!
October 26, 2008

spanish
another question.. does this make sense or should i change tiene es and esta? La nueva maestra tiene pelo castano y largo. ella es alta y hoy esta una falda larga. que triste es ella! por que no es contenta? no lo se.. pues vamos a ver! Thanks so much!
October 21, 2008

spanish
im having trouble with gustar. does gustar refer to the person or the object when making it plural? like an example: A nicolas le GUSTAN las ciencias politicas. or: a nicolas le GUSTA las ciencias politicas. thanks!
October 21, 2008

Science
up
October 20, 2008

history
i have to do a news article on gaius (caligula) caesar about a big event that happened towards the end of his life. does anyone know a big event that happened towards the end of his life? all i can really find is when he was assassinated and that wont work.
October 19, 2008

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