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Posts by tara

Total # Posts: 368

chemistry- What does this symbol mean
if there is an E symbol with a slash through it on an ICE chart what does it stand for?

chemistry
because i have to relate it to the table can inot use a visual experiment to test ph such as color? how about just test hydrogen or hydroxide in a conctration? am i on the right track

chemistry
This is an assesment question and im really bad at these, i did the first two questions and now i am stuck. They ask you to design a series of experiments that can be used to confirm the structure and organization of the table of relative strengths of acids and bases. the want...

chemisrty - ICE CHART DEPOSTION
isnt the equilibrium of HNO2 0.0407 because the equilibrium of H+ is 0.0043? i am confused if no change occured in the reaction according to the chart...

chemisrty - ICE CHART DEPOSTION
How do i find pH of HNO2 i just need a formula to follow cause i cant figure out the equation.

chemisrty - ICE CHART DEPOSTION
How do i fill out an ICE chart when i am only given an initial concentration of one reactants and an equilibrium of another reaction? inital 0.045 HNO2(aq) Equilibrium 0.0043 H3O+(aq) NO2(aq) - no information my first thought was to sqaure root .0043 mol/l by 10 to find the ...

chemisrty - ICE CHART DEPOSTION
How do i fill out an ICE chart when i am only given an initial concentration of one reactants and an equilibrium of another reaction? inital 0.045 HNO2(aq) Equilibrium 0.0043 H3O+(aq) NO2(aq) - no information my first thought was to sqaure root .0043 mol/l by 10 to find the ...

chemistry
no i have to teach myself and that's why i was so confused i knew CH3COO would gain a proton but i didn't realize that hcl changed to HCl ==> H3O^+ + Cl^- so it makes a little more sense.I do wanna make sure i understand and i have troubles breaking down the ...

chemistry
testing bronsted lowry reaction predictions...... im super stuck can someone help me steo by step how to figure this out assuming i use the 5 step process? write a balanced chemical equation for ch3coona and hcl reaction position of equilibrium. I know that ch3coo is a SB and ...

English
Well positive points of having the gap between rich and poor

English
What are the minor affirmative claims to the gap between rich and poor widening?

chemistry - equilibrium Help
you observed that very little corrosion occurred on the nail immersed in NaOH(aq) solution. This observation is difficult to explain from an electrochemistry perspective since electrochemistry principles predict a spontaneous reaction that should cause corrosion. Explain why ...

chemistry 30 concentration of a product
chemical reaction is NOBR2 -->Nog)+B2(g)

chemistry 30 concentration of a product
it is nitrosyl bromide

chemistry 30 concentration of a product
calculate the concentration of the products of the following equilibrium when the equilibrium constant is 12.3 and the equilibrium concentration of nobr2 is 2.17 mol/l

Chemistry lab
just gonna post my answer to see if more can be added or fixed 1. In trail one CaCl2 will react completely (limiting regent) which limits the complete reaction of NaSO4 (excess regent) therefore creating a precipitate of sulfur. In trails 2-4 as the concentrations increase the...

Chemistry lab
i should also explain that i know the limiting and excess agents and how after a limited reaction is complete no further reaction can occur leaving an excess regent, and well as dynamix equilbruims however my teacher wants more

Chemistry lab
I have spent the last 6 hours trying to figure this out and have talked to my teacher and apparently i canoot get it right as i have to explain sulfate ions other things i don't understand (never took chem before) questions i need help with Na2so4 .05mol/l are reacted with...

Chemistry 30
oh im sorry its naso4

Chemistry 30
why does the mass of parcipitate not change when concentration of cacl2 are increased (0.05, 0.075,0.10mol/l)when reacted with nacl2 ( .05mol/l)

Physics
540,000 J

AP Chemistry
What volume of 0.596M K3PO4 is required to react with 29 mL of 0.864 M MgCl2 according to the equation 2K3PO4 + 3MgCl2 -> Mg3(PO4)2 + 6KCl Answer in units of mL

Organic chemistry recrystallization
Say you have a substance X will .5 g of X dissolve in 5.0 ml of water if boiled at 80 degrees? And at what temperature will crystals begin to form?

math
-3x times x

Physics
As a civil engineering intern during one of your summers in college, you are asked to design a curved section of roadway that meets the following conditions: When ice is on the road, and the coefficient of static friction between the road and rubber is 0.077, a car at rest ...

Physics
An airplane is flying in a horizontal circle at a speed of 514.8 km/h. The plane is banked for this turn, its wings tilted at an angle of 41.6° from the horizontal. Assume that a lift force acting perpendicular to the wings acts on the aircraft as it moves through the air...

Physics
A 84.0-kg airplane pilot pulls out of a dive by following, at a constant speed of 163 km/h, the arc of a circle whose radius is 312.0 m.

Physics
A Ping-Pong ball has a mass of 2.3 g and a terminal speed of 8.2 m/s. The drag force is of the form bv2 What is the value of b?

Physics
A 150-g block is projected up a ramp with an initial speed of 5.6 m/s. The coefficient of kinetic friction between the ramp and the block is 0.23.

Physics
In the figure below, m1 = 3.8 kg, m2 = 5.2 kg, and the coefficient of kinetic friction between the inclined plane and the 3.8-kg block is μk = 0.3. Find the magnitude of the acceleration of the masses and the tension in the cord.

Math
Janet has a pink blouse, a red blouse and a white blouse. She has a pink skirt, a red skirt, a black skirt and a white skirt. How many combinations could she make? My answer is 12 combinations. I mulitiplied 3 blouses times 4 skirts.

Chemistry
How many milliliters of 1.5 M NaHCO3 would it take to neutralize 300 mg of Benzoic Acid (C7H6O2)

Chemistry
Thanks for the help!

Chemistry
How many milliliters of 1.5 M NaHCO3 would it take to neutralize 300 mg of Benzoic Acid (C7H6O2)

5th grade math
idk c; lol

math
what is y times y? 2y?

reading
is there anywhere i can read the story "my first free summer" by julia alvarez online?

math
write each number in expanded form 174.273

Algebra2
Ahh! I'm confused about this math stuff:/ it's my first time trying these algebra problems. I'm trying to go by the teacher's examples. Can You tell me if these are right:p? 2. (7-√-15)^2 = 34+14i√15i 3.4+√-20 / 2 =2+2.5√4i

Algebra2
I got this answer for a problem, and I'm not sure if it's right. Can someone tell me if I'm correct? 1.(2+4i / 3-i) = 6/7+5/7i

healthcare management
The individual or group that will be communicating inside and outside the organization during a crisis situation. The director of a regional Emergency Management for inside and outside groups would be the state health department, local police station, firemen, and local media.

Calculus
Derivative, my apologies.

Calculus
f(x)= 5ln(x)/x^7

math
Angle A=60° Angle B ? Angle C 90°

Calculus
Thank you, and I was a bit confused. Thanks though!

Calculus
find the derivative of the function: f(x)=6ln(x)/x^9

Calculus
a piece of wire 12 ft. long is cut into two pieces. one piece is made into a circle and the other piece is made into a square. Let the piece of length x be formed into a circle. allow x to equal 0 or 12, so all the wire is used for the square or for the circle. How long should...

geometry
A student notices that the shadows of a sign and a tree lie among the same line and end at the same point. The height of the sign is 2 meters and its shadow is 3 meters in lenght. The distance from the base of the sign to the base of the tree is 12 meters. How tall is the tree?

statistics
suppose the replacement times for washing machines are normally distributed with mean 8.6 years and standard devistion of 1.6years. a. what percentage of washing machines have replacement times less than 7 years? b. find the probability that a washing machine will have a ...

statistics
a company manufactures batteries in batches of 18 and there is a 3% defect rate. Find the standard deviation for a number of defects per batch?

american history
Which of the following distinguished the Middle Colonies from New England and the Southern Colonies?

chemistry
Using a diagram to represent a barometer, The first bubble has 4.0L of Ar @ 1.5 atm a stopcock in between. middle bubble 3.0L Xe @ 6.2atm. stopcockB next bubble 8.0L CO @ 4.4 atm. What is predicted pressure if stopcock A is opened

Chemistry
30 grams

PHI103
1. A radical skeptic might be willing to doubt which of the following? (Points : 1) 3 + 5 = 8 Grass is green. Cheese is fattening. All of the above

statistics
I need to see the steps to figuring out this problem. 270 patients were given a placebo of those 270, 19 had headaches. What percentage of this placebo group reported headaches?

math
what is 14 decreased to 12

chemistry
If 5.50 moles of aluminum are reacted with 4.55 moles of copper(II) chloride, how many moles of aluminum chloride are porduced by the limiting reactant?

CHEM
Cl2 + SO2 + 2 H2O --> 2 Cl^1- + SO4^2- + 4 H^1+ 1) Which element is oxidized ? (simply write the element symbol; e.g. Fe, O) 2) How many electrons are lost by each atom ? (1, 2, 3) 3) Which element is reduced ? 4) How many electrons are gained by each atom ?

Algebra
Mildred makes $3 an hour babysitting and $6 an hour when she works at Wendys. Her parents do not want her working more than 20 hours per week. Mildred would like to earn at least $70 a week. Write a system of inequalities that show the number of hours she could work at each ...

Algebra
The twin theater charges $7 for adult tickets and $4 for children 12 or under. The theater has 470 seats. The manager wants to have a nightly income ( two shows) of at least $5000. Write a system of inequalities for the number of children and adult tickets that can be sold. ...

Math 4th Grade
Adult Tickets are $5 Child Tickets are $2 There are twice as many children as adults at the concert. The total amount collected was $1,080. How many adults are at the concert?

Personality Psychology
what is the difference between distortion and displacement?

appl,ied business research & statistics
When would you use Chebyshev’s theorem and the empirical rule in health administration? How are they calculated? Provide one real-life example that requires Chebyshev’s theorem and one that requires the empirical rule.

Math
Kamala had 5,026 grams of flour in a canister. She brought a 4,157 gram bag of flour. She poured some flour from the bag to the canister. As a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. How much flour is in the bag now?

physics
Four masses are positioned at the corners of a rectangle, as indicated in the figure below (not to scale). (a) Find the magnitude and direction of the net force acting on the 2.0 kg mass if x = 0.40 m and y = 0.12 m. (b) How do your answers to part (a) change (if at all) if ...

physics
A 3.28-kg bucket is attached to a disk-shaped pulley of radius 0.108 m and mass 0.727 kg. (a) If the bucket is allowed to fall, what is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How far does the bucket drop in 1.65 s?

Chemistry
Calculate the mass of Glauber's salt needed to lower the temp of air in a room by 6.3 C. The mass of air in the room is 555.4 kg, the specific heat is 1.2J/g-c

elements of calculus
cost, revenue, and profit are in dollars and x s the number of units cost: if the cost function for a particular good is C(x)= 3x^2 +6x + 600, what is the (a) marginal cost function (b) marginal cost if 30 units are produced? (c) interpretation of your answer in part (b)?

elements of calculus
if d^2y/dx^2= x/x^2 +1, find d^4y/dx^4

elements of calculus
find ds/dt if s= sqaureroot of t over (3t -1)

elements of calculus
write the equation of the line tangent to the curve y= 3x^3- 2x at the point where x=2

Business
The purpose of the General Agreement on Tariffs and Trade (GATT) is to

human services
my beliefs, values, and clinical gesatalt with individuals and systems paper

Chemistry
What is the maximum mass of S8 that can be produced by combining 92.0g of reactant? 8SO2 + 16H2S -> 2S8 + 16H2O

Chemistry
What is the maximum mass of S8 that can be produced by combining 92.0g of reactant? 8SO2 + 16H2S -> 2S8 + 16H2O

physics
during takeoff, an air plane goes from 0 to 360km/hr in 5s. A.) what is its acceleration? B.) How fast is it going after 5 s? C.) How far has it traveled by the time it reaches 50m/s?

chemistry
does a mixture of carbonic acid, H2CO3, a weak acid, and sodium bicarbonate, NaHCO3 in water constitute a buffer? If no explain why

Chemistry
What is the value of the equilibrium constant for the dissociation of acetic acid's proton? What does this value tell you?

chemistry
a solution is prepared by dissolving 02.50 mole of Ba(OH)2 in enough water to get 4.00 L of solution. What are the OH- and H3O+ molar concentrations?

math
u=(3,-4) v=(-5,-2) u-v=?

Trig
Water is being pumped at a 3 cubic feet/minute into a cylindrical storage tank with a circular base of a radius 4 feet. Find the depth of the water (d) as a fucntion of time (t)

Math
A) Sometimes - Parallelogram has sides that parallel to each other. Therefore this can be a rhombus, square or rectangle. B) Always -Sides of a square are all equal. All the angles are right. If you draw 1 diagonal you get a right triangle. A^2+B^2=C^2. This will be the same ...

chem
how do you Convert moles S2O3^-2 to moles I2

chemistry
A student determined the chloride content of a commercial salt by using the Mohr method. A 0.5324 -g sample of the salt was dissolved in distilled water and diluted to a final volume of 250. mL. A 25.-mL aliquot of the analyte solution was then titrated against a standard 0....

chemistry
how do you Convert moles S2O3^-2 to moles I2

chemistry
S2O3^-2..... why is it to the power of -2?

chemistry
A 1.2431 -g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated elemental iodine ...

english
Thanks SraJ and deanna, I do believe those are the four types simply because the paragraph asks for types of writing, not critical reading skills. Thanks again.

english
the assignment is to write a paragraph explaining the key differences between the four types of writing. I need clarification on whether the four types of writing should be summary,analysis,synthesis,evaluation or narrative, descriptive, comparative, expository. I know the ...

calculus help.Pleaseee(thankyou guys for helping
Your Open QuestionShow me another » Calculuss homeworrk heelp? A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from...

calculus
an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the airport.?When will they be the ...

BOOKS.. english
Explain how John Hersey blended characteristics of fiction and nonfiction in Hiroshima. How does this combination of genres help Hersey convey his feelings about the atomic attack on Hiroshima? Write a short essay that explains your answer. Support your ideas with details from...

English.. Literature... books
k .. well i do have some questions with ANSWERS, but am not really sure of the answers ... 1. Since the 1970', American poetry has? A. been characterized by diverse voices and styles B. become increasingly narrow in subject matter C. reflected a more elitist perspective D...

English.. Literature... books
can u give me multiple choice questions from the "examview" on the story "A Noiseless Flash" from Hiroshima by John Hersey ... i really need to practice this selection. Plz if u can, copy and paste the questions because the link you might send me would not ...

English
When the government issued the Susan B. Anthony, dollar coin on July 2,1979 it met with some disapproval.

Biology
You find an unusual organism growing on the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you classify this organism? Explain your decision.

ethics
What is the relationship and impact that scarce resources have on administrative ethics?

MAth
Name two numbers that can be equally divided by 4 and 6

physics
How fast (in ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000 's?

algebra
the expression below is the factorization of what trinomial -7(x+5)(x+8)

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