Monday
October 24, 2016

# Posts by Brittany

Total # Posts: 930

hca 270
Lady, you are so rude. Why are you even on this "help" site if all you do is chastise people?
February 25, 2010

chemistry
If 100 mL of a 3 M solution of sodium hydroxide is diluted to a total volume of 600 mL with distilled water, what will the final concentration of sodium hydroxide be?
February 17, 2010

statistics
The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
February 16, 2010

math
Factor the four-term polynomial. mn - 15 + 3m - 5n
February 15, 2010

Math
Use substitution to solve: 3x-2y=2 x-3y=4
February 14, 2010

Physics I
23m is wrong
February 7, 2010

how do you add a fraction with a different denominator
February 5, 2010

Have the regulatory agencies been outlawed by the federal courts?
February 4, 2010

eight states border one or more of the five great lakes.write a fraction reprersenting the part of the 50 states that border a great lake.write the fraction in it's simplest forms.
February 3, 2010

Physics
Alright i can not get this question i'm confused
January 31, 2010

college physics
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
January 31, 2010

physics
While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.10 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
January 31, 2010

PHYSICS
The intensity level of a sound is reported in unit decibel(dB). how does IL change if we increase a sound intensity by a factor of 10? a)remains the same b) increases by 1dB to 2dB c)it increases by 2dB to 20dB d)it increases by 20dB to 200dB e) it decreases equations... IL=10...
January 31, 2010

Physics
The intensity level of a sound is reported in unit decibel(dB). how does IL change if we increase a sound intensity by a factor of 10? a)remains the same b) increases by 1dB to 2dB c)it increases by 2dB to 20dB d)it increases by 20dB to 200dB e) it decreases equations... IL=10...
January 30, 2010

Post at least 2 challenges that many companies face in the areas of ethics and 2 challenges in the area of social responsibility. What exactly is management's role in addressing each of these issues? Is ethics standard way of getting things done im completely confused
January 27, 2010

physics
what happens to acceleration due to gravity if you climb the tallest mountains on the earth ?
January 21, 2010

spanish
what kind of music is more boring ?
January 21, 2010

english
about nine hundred known comets comet's tail can extend 93.2 million miles comet's nucleus can be .5 to 12 miles across once considered bad omens today greeted with excitement and curiosity have elliptical orbits orbits vary widerly one of the best-known comets named ...
January 21, 2010

english
well i have a worksheet that says combining sentences to write a paragraph and its really long. if you want me to i can type the whole thing.
January 21, 2010

english
I have a combining sentence worksheet to do and I don't know how to do that.
January 21, 2010

Literary Analysis and Composition
I got a 94.1%! Thanks!!
January 21, 2010

MAth
find the next three numbers in the pattern 2/3, 1 5/12, 2 1/6, 2 11/12 _, _, _
January 20, 2010

physics
A football player runs the pattern given in the drawing by the three displacement vectors A, B, and C . The magnitudes of these vectors are A = 5 m, B = 16.0 m, and C = 16.0 m. Using the component method, find the magnitude and direction è of the resultant vector A,B,C...
January 20, 2010

math
There would be 13 cars and 5 ships.
January 19, 2010

Government
Thank you so much! :)
January 19, 2010

Government
I need both actually.
January 19, 2010

Government
How many years can an Oklahoma senator serve? and how many consecutive terms can they serve?
January 19, 2010

algebra
0=0 so the answer is all real numbers
January 19, 2010

American Education
As the supply of teachers diminishes, the demand on new and existing teachers increases. As a potential teacher and educator, identify two perceived challenges of the teaching profession that you may struggle with the most. In contrast, identify two opportunities you may have...
January 19, 2010

Physics
A gas sample is confined to a chamber with a movable piston. A small load is placed on the piston and the system is allowed to reach equilibrium, shown above. If the weight of the piston and the load is F=70.0 N and the piston has an area of A=9.00x10-4 m2, what is the ...
January 17, 2010

algebra 2
SImplify the expressions. 1. x to the seventh times 1/x squared 2. (3 quaredx to the sixth)cubed 3. x to the nith/ x negitive squared 4. 15xsquaredy/ 6x to the fourthy to the fifth times 6xcubed y squared/5xy USE direct substitution to evaluate the polynomial function for ...
December 13, 2009

social studies
what is the most useful indicator of the degree of democracy reached by a particular society is whether it has a:
December 2, 2009

chemistry
Are the following quantum number combinations allowed? Else show any one way to correct them. a. n = 2, l = 0 m = -1 b. n = 4, l = 3 m = -1 c. n = 1, l = 0 m = 0 d. n = 3, l = 1 m = -2
December 2, 2009

chemistry
How fast must a 56.5 g tennis ball travel in order to have a de-Broglie wavelength that is equal to that of a photon of green light (5400 Angstroms)?
December 2, 2009

chemistry
An alpha particle has a mass of 6.6*10-24 g travels at 3.4*107 +/- 0.1*107 mi/h a. What is the DeBroglie wavelength (in meters)? b. What is the uncertainty in position?
December 2, 2009

chemistry
A radio wave has a frequency of 3.6 * 10 10 Hz. What is the energy of one photon of this radiation? thank you.
December 2, 2009

Chemistry
How many molecules are present in 1.00 mg of asprin, C9H8O4?
December 1, 2009

SCIENCE
The reactants methane and oxygen combine in a combustion reaction to form carbon dioxide and water.
December 1, 2009

biology
No, the blood leaves the heart and goes to one of 2 places; one is pulmonary circulation which involves going to the lungs to be oxygenated and the other is systemic circulation which carries oxygenated blood to the rest of the body. The blood going to your stomach would be a ...
December 1, 2009

biology
They all exhibit the characteristics of living things, ie made of cells, reproduce, maintain homeostasis, grow and develop, etc.
December 1, 2009

AP Government
d) because before the 20th century voters would be given multiple identities by party machines and so they would vote more than once in elections so it appeared that voter turnout was high and that it has declined during the 20th century. Actually it has seemed to decline ...
December 1, 2009

Chemistry
Thank you soo much! :)
December 1, 2009

Chemistry
How do I convert the following quantity to moles? 44.0g of H2O
December 1, 2009

AP Chemistry
You still have the effect of the water absorbing the heat that DrBob stated in b.
November 30, 2009

chemistry
use thermochemical equations shown below to determine enthalpy for the reaction: H2CO3-->H2O+CO2 1) H2CO3 --> H2CO + O2 H; 224 KJ 2)H2CO + O2 --> H2O + CO2 H; -100KJ I know this problem is one that you have to rewrite the equations to get the equation in the original ...
November 20, 2009

chemistry
use thermochemical equations shown below to determine enthalpy for the reaction: H2CO3-->H2O+CO2 1) H2CO3 --> H2CO + O2 H; 224 KJ 2)H2CO + O2 --> H2O + CO2 H; -100KJ I know this problem is one that you have to rewrite the equations to get the equation in the original ...
November 20, 2009

chemistry
Hydrogen peroxide decomposes according to the following thermochemical reaction H2O2 --> H2O +1/2 O2 ; H= -98.2 kJ calculate the change in enthalpy when 1.00 g of hydrogen peroxide decomposes.
November 20, 2009

chemistry
Determine mass of iron heated to 85.0 degrees C to add to 54.0 g of ice to produce water at 12.5 degrees C. The specific heat of iron is 0.045 J/g C.
November 20, 2009

Chemistry
determine the final temp when 45.8 g of aluminum at -5.2 degrees C is added to a mixture of 45.0 grams of ice at 0.00 degrees C and 2000.0 g of water at 95.0 degrees C.
November 20, 2009

Chemistry
Please help me answer the question: What does it mean Write a net ionic equation for the reaction 2HCl + Ca(OH)2 -> CaCl2 + 2H20
November 18, 2009

math
November 18, 2009

math
The chance that you get each question correct is 1/2. To calculate the probability of a perfect score on a 4 question test, you muliply the chance for each correct answer, sooo 1/2 X 1/2 X 1/2 X 1/2 = 1/16 On the 10 question test, it would be 1/2 X 1/2 X 1/2 X 1/2 X 1/2 X 1/2 ...
November 18, 2009

antonyms
give/take left/right up/down in/out sour/sweet crooked/straight
November 18, 2009

Chemistry
Thanks!
November 18, 2009

Chemistry
What kind of reaction is the following equation? Ca + H20 -> Ca(OH)2 + H2 (g)
November 18, 2009

Capitals in Sentences
For my geography paper I am talking about the diseases of Foot and Mouth Disease, Smallpox, and Spanish Influenza. Throughout my paper I am not sure whether I should be capitalizing these words or keeping them lower case. example sentences below: - This report will discuss the...
November 17, 2009

Physical Science
A red light source and a green light source shine on a white screen. what color will the screen be? Explain your answer. If a blue object is placed in front of the screen, what color will it be? explain your answer
November 14, 2009

Physical Science
If an engine must do 500 joules of work to pull a 100 N load up to a height of 4 meters, What is the efficiency of the engine?
November 14, 2009

Well you have to divide 64g by the molar mass of CO (28.01) to find the moles of CO you have. Then you multiple the moles by 3.02*10^23 to find the molecules.
November 11, 2009

Payroll Accounting
Help with my Payroll Accounting Final Project. Class AC122-05. Please. I am so lost.
November 8, 2009

Economics
If a city's unemployment rate is at 8% and the natural rate is 3% with the current GDP at \$100 million what is the full employment equilibrium?
October 31, 2009

Trigonometry
State the amplitude of the following functions: a) y = cos theta b) y = 1/2cos theta c) y = -2cos theta
October 29, 2009

History
thank you so much
October 28, 2009

History
I have to know,every time i search this question it only tells me where he went. Why did Christopher Columbus go on voyages?
October 28, 2009

Dr.Bob222
Thank you so much DrBobb for all of your help!!
October 27, 2009

Dr.Bob222
this is all my work so far on the limiting reagent problem I asked about yesterday about Calcium nitrate and ammonium fluoride.... 28.42g/164.1= .17318 mol Ca(NO3)2 29.6g/37.042=.79909 mol (NH4)F (1mol Ca(NO3)2 /.17318) x (2mol (NH4)F/x)=.34636 (2 mol (NH4)F/.79909)x(1 mol Ca(...
October 27, 2009

chmistry
gunpowder is a mixture of potassium nitrate , sulfur and carbon in th proportion (by mass) of 6:1:1 (KNO3;S:C). A typical riflr shell contains 3.2 gunpowder. How many moles of each compnent are there in our sample gunpowder? KNO3 mole: C: mol S: mol Thank you for helping!!
October 27, 2009

chm
gunpowder is a mixture of potassium nitrate , sulfur and carbon in th proportion (by mass) of 6:1:1 (KNO3;S:C). A typical riflr shell contains 3.2 gunpowder. How many moles of each compnent are there in our sample gunpowder?
October 27, 2009

english
give 5 reasons why verbs are important to your life
October 26, 2009

Physics
A wagon with a weight of 200.00 N is accelerated across a level surface at 0.8 m/sec squared. What net force acts on the wagon?
October 26, 2009

physics
A sled is pulled at a constant velocity across a horizontal snow surface. If a force of 100 N is applied to the sled at an angle of 40 degrees to the ground, what is the force of friction between the sled and the snow?
October 26, 2009

chemistry
D --> E and E --> F have yield of 61% and 83% respectively. what is the overall percent yield for conversion D --> F? thank you.
October 26, 2009

chemistry
chemical analysis shows hemoglobin contains 0.34% of Fe by mass. How many moles of Fe wold be in a 100.00 g sample? Thank you.
October 26, 2009

Chemistry
metal hydrides react with water to form hydrogen gas and the metal hydroxide. How do you calculate the mass of hydrogen gas taht can be prepared from 3.78 g of SrH2 and 3.5 g of H2O? a) how many moles of H2 can be produced from given mass of SrH2? b) How many grams of H2? ...
October 26, 2009

Chemistry
28.42g/164.1= .17318 mol Ca(NO3)2 29.6g/37.042=.79909 mol (NH4)F (1mol Ca(NO3)2 /.17318) x (2mol (NH4)F/x)=.34636 (2 mol (NH4)F/.79909)x(1 mol Ca(NO3)2/x)=.399545 so (NH4)F (.34636) is limiting reagent. now I'm stuck. Not sure what you mean about subtracting moles from ...
October 26, 2009

Chemistry
Calcium nitrate and ammoonium fluoride react to form calcium fluoride, dinitrogenmonoxide and water vapor. What mass of each substance is present after 28.42 g of calcium nitrate and 29.60 g of ammonium fluoride react completely?
October 26, 2009

Chemistry
Elemental sulfur occurs as octatomic molecule S8. What is the mass of Fluorine gas needed to react completely with 19.9 g of Sulfur to form sulfur hexafluoride?
October 26, 2009

Physics
9.8= 1/2mv^2 + 1/4mv^2 9.8= (3/4)(mv^2) [9.8*(4/3)]/m= V^2= 1.307 sqr(1.307)=V= 1.14 I have a question.. Why is there 1/2 and 1/4 in the first question.. are they just constants?
October 26, 2009

Spanish
La persona que se murio mas recientemente fue una mujer. El deiciocho de agosto era la fecha que ella fue al hospital. "Fue" is past tense of the verb "to be" or "to go". "Era" is USED TO BE. Remember that to help you in other sentences...
October 18, 2009

writing
Have you ever been seen as a hero in anyway? Maybe you were seen as a hero in your family's eyes or another child?
October 18, 2009

health
compare 2 countries to the US in way people eat type of food. include heart disease information
October 5, 2009

anatomy
October 5, 2009

anatomy
project please helppp me create a road map/travel guide throught the body starting from the head finishing at your toes.be creative with how you represent cavities. include introduction and superior or cranial or inferior or caudal. and 2 body cavities
October 5, 2009

world civics
what authoritites support john locke's argument in a letter concering toleration
September 29, 2009

Physical Science
A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35. Sand is gradually ...
September 28, 2009

Culinary arts
what times does a master chefs work?
September 21, 2009

computers
what microphone is more desirable than a headset microphone when using a speech recognition system?
September 21, 2009

hardware
The increase in speed and memory of computers improve the effectiveness of this tool, what is the tool?
September 21, 2009

WRITEING
HOW DO U WRITE CA POEM?
September 17, 2009

How did the broad river get its name?
September 17, 2009

tHERMOMTER COLD WATER
September 17, 2009

art
i need to know the ten different line types i only knowoblique,straight,zig zag,loopde loop and i don't know anymore can sum 1 plz help me
September 5, 2009

Geometry
wow thats a whole lot of questions is that all u r h/w?
September 5, 2009

english
Just as My Àntonia’s setting is initially raw and featureless, its narrative at first seems haphazard: “I didn’t arrange or rearrange. I simply wrote down what of herself and myself and other people’s, Antonia’s name recalls to me. I suppose it ...
September 2, 2009

in my workbook it says why do you think earth looks like a blue and white marble from space ? the reason why is because there coler blind PLEASE HELP !!!!
September 1, 2009

what web site
August 10, 2009

nutrition and wellness
all you need to do is think out loud and stop asking for help as soon as you get your assignment you're neve gonna learn anything by that. the question you just asked is VERY common sence
July 22, 2009

Math (for Reiny)
No i don't know the function and i still don't get how you went from 13 to 25 squares, can you explain how do i come up with that answer for future questions?
June 18, 2009

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