Questions Asked on
February 29, 2012

chemistry
Calculate the standard freeenergy change for the following reaction at 25 °C. 2Au^3+(aq) + 3Ni(s) >2Au(s) + 3Ni^2+(aq)

Chemistry  Enthalpy reactions
What is the reaction enthalpy for CaCO3(s) > CaO(s) + CO2(g)? should i be using a enthalpy reaction table?

Math
A farmer needs to enclose three sides of a pasture with a fence (the fourth side is a river). The farmer has 42 meters of fence and wants the pasture to have an area of 220 sqmeters. What should the dimensions of the pasture be? (For the purpose of this

Chem II
PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?

Math
You want to have 1.5 million in real dollars in an account when you retire in 40 yeras. the nominal return on your investment is 11 percent and the inflation rate is 3.8 percent. What real amount must you deposit each year to achieve your goal? My answer

physics
A science museum has asked you to design a simple pendulum that will make 25.0 complete swings in 85.0 {\rm s}. How long should the pendulum be? in meters

Physics
A 3.00  µF and a 4.00  µF capacitor are connected in series, and this combination is connected in parallel with a 2.00  µF capacitor (see the figure ). What is the net capacitance? 3.00  µF 4.00  µF 2.00  µF 26.0 V

Catering(Gourmet Essentials)
1. In the dining room brigade system, the positions of maitre d’hôtel and/or captain may be combined under the title of A. communard. C. chef de salle. B. boulanger. D. sommelier. 2. Rachel and Mark are discussing the requirements of a healthy diet.

Gen Chem
At elevated temperatures, solid silicon reacts with chlorine gas to form gaseous SiCl4. At some temperature, the equilibrium constant for this reaction is 0.30. If the reaction is started with 0.10 mol of SiCl4 in a oneliter flask, how much Cl2 will be

Elementary statistics
Nine apples, four of which are rotten, are in a refrigerator. Three apples are randomly selected without replacement. Let the random variable x represent the number chosen that are rotten. Construct a table describing the probability distribution, then

arithmetic
if 6 times the sixth term is equal to 15 times the fifteenth term ,find its 21st term

Math
A cylindrical tin can has a radius of 4.5cm and a height of 5 cm (a)What is the surface area of the can (b)What is its volume? (c)What is the cans capacity could somebody please answer this question so i can get past with math

chemistry
Rank these species by their ability to act as an oxidizing agent. Na^+ I2 Cr^3+ F2 Put best oxidizing agent first and continue to have best reducing agent last.

chemistry
As the pH of a system decreases: the [H+] decreases the Kw decreases the [OH] decreases all of the above

Trig
A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x = 31° and angle y = 49°, as shown in the figure. (Round your answers to two decimal places.) Find the distance of the plane from

chemistry
2H2(g)+S2>2H2S A.)how would the equilibrium be affected given the following:  increase in temperature=  increase in hydrogen concetration=  increase in reaction container volume= B.) what is equilibrium expression?? please help anywork would

Math
Yolando Bravo wants to make the following deposit: 1 20 dollar bill 3 5 dollar bills 4 1 dollar bills 7 quarters 6 dimes 8 nickels 64 pennies 1 paycheck for $328.92 1 refund check for %18.95 i try to do this i been stuck on this problem all freaking day

Algebra
what is the complete factored form of this expression? 3m ( n + 2 ) + p ( n + 2 )

Calculus (Area Between Curves)
Find the area of the region IN THE FIRST QUADRANT (upper right quadrant) bounded by the curves y=sin(x)cos(x)^2, y=2xcos(x^2) and y=44x. You get: a.)1.8467 b.) 0.16165 c.) 0.36974 d.) 1.7281 e.) 0.37859 Based on my calculations, I would say that the

Calculus (Area Between Curves)
Find the area of the region IN THE FIRST QUADRANT (upper right quadrant) bounded by the curves y=sin(x)cos(x)^2, y=2xcos(x^2) and y=44x. You get: a.)1.8467 b.) 0.16165 c.) 0.36974 d.) 1.7281 e.) 0.37859

computers
Which of the following html tags would you use after a table? A. B. C. D. i say b.

physics
How could the age of this asteroid fragment be determined?

Bio please help!
What is a vital process performed by proteins embedded in cell membranes?

physics
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 25.0 in a direction 60.0 west of north. Jane walks 14.0 in a direction 30.0 south of west. They then stop

Chemistry
If the percent yield was 81.5%, how many grams of aluminum were used to prepare 20.0 g of potassium alum?

Physics
A circular loop of wire with radius 0.0450 m and resistance 0.154 R is in a region of spatially uniform magnetic. The magnetic field is directed out of the plane. The magnetic field has an initial value of 7.89 T and is decreasing at a rate of 0.630 T/s.

Calculus (Definite Integrals)
How many definite integrals would be required to represent the area of the region enclosed by the curves y=(cos^2(x))(sin(x)) and y=0.03x^2, assuming you could not use the absolute value function? a.) 1 b.) 2 c.) 3 d.) 4 e.) 5

math percents
can you check these: what percent of 64 is 48? i got 75% 25% of what number is 24? i got 96 48% of 83 is what number? i go 39.84 what percent of 530 is 107? i got : 201.88 62% of what is number is 84? i got 135.48 what percent of 42 is 7.5? i got 17.86 37%

Chemistry
For H2(g) + Br2(g) > 2HBr(g) k=64

statistics
Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct): 89, 64, 88, 89, 91, and 75. Instead of averaging the six scores, the instructor indicated he would randomly select five

PHYSICS!! SOS
Determine the scalar product of A= 3.0i + 1.0j  2.0k and B= 3.0i  2.0j  3.0k .

Chemistry
What amount of hydrogen peroxide should result when 1.21 g of barium peroxide is treated with 25.1 mL of hydrochloric acid solution containing 0.0289 g of HCl per mL?

physics
An 840 Kg roller coaster car is launched from a giant spring of constant k=31 kN/m into a frictionless looptheloop track of radius 6.2 m, as shown below. What is the minimum amount that the spring must be compressed if the car is to stay on the track?

physics
Asteroids can be classified into two broad groups based on their composition and location: carbonrich asteroids dominate the outer part of the asteroid belt, whereas metalrich asteroids dominate the inner part of the belt. Analysis of the fragment we

Chemistry
Calculate the volume (in mL) of 9.0M H2SO4 that you would need to convert 0.070 moles of KAl(OH)4 to K2SO4 and Al2(SO4)3 according to the following equation: 2 KAl(OH)4 + 4 H2SO4>K2SO4 + Al2(SO4)3 + 8 H2O

Math problem
a little confused please help what is the square root of 160 square root of 20.

Chemistry
Charges on the metal MgSO4 = +2 NiSO4*6H2O = +2 CoCl2*6H2O = +2 KCr(SO4)2*12H2O = +3 CuSO4*5H2O = +2 (NH4)2Cr2O7 = +2 FeSO4*7H2O = +2 MnCl2*4H2O = +2 FeCl3*6H2O = +3

To Ian
I've removed your post because you put your email address in it. That's not a good or safe thing to do online. If you wish to repost your question, that's fine. Just don't include any personal information, such as your full name, email address, etc., if

Physics
A roller coaster (491 kg) moves from A (1.09 m above the ground) to B (26.3 m above the ground). Two nonconservative forces are present: friction does 2.39 x 104 J of work on the car, and a chain mechanism does +5.18 x 104 J of work to help the car up a

math
A trough is 11 feet long and has ends that are isosceles triangles that are 1 foot high and 2 feet wide. If the trough is being filled at a rate of 9 cubic feet per minute, how fast is the height of the water increaseing when the height is 7 inches?

algebra
During a sale, a dress decreased in price from 95$ to 81%. What was the percent of the decrease?

grade 10 chemistry
factor labels 200ml per hour to kl per year

math
A recipe calls for 3 2/3 cups of orange juice.You want to make half of the recipe.How many cups of juice should you use?

chem
how many liters hydrogen if you react 3.51 L of .97M hydrochloric acid with excess zinc?

physics
A 0.50kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a)

algebra
Factor out the greatest common factor in the expression? 11y^555y^2

english
could you please tell me how to make use of will be in language use eg i will be there she will be a unique woman

Trig
When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of the common face is given by

math 3rd grade
Sam is making muffins. One bath is blueberry and one batch is bananna. The third bath is twice as big as the blueberry and bananna batch. If Sam made 96 muffins, how many muffins were in the blueberry and banana batches? I came up with 32 can someone

PreCal
This exercise is based on the following table, which lists interest rates on longterm investments (based on 10year government bonds) in several countries in 2008. Assuming that you invest $9,000 in the United States (3.9%), how long (to the nearest year)

Mathematics
A rectangular block of lead with dimension 43 cm x 53 cm x 63 cm is melted to mould spherical balls of 3 cm radius. How many balls are made? (Round your answer to the nearest whole number and take Pi as 3.14)

CALCULUS
In Seattle on September 30, the temperature hours after midnight was given by the function y=60 + 12sin((pi/x)(x11)) What was the average temperature over the period from 8 A.M. until 10 P.M.?

stat
What is the probability of getting a license plate that has a repeated letter or digit if you live in a state that has four letters followed by three numerals followed by two letters? (Round to the nearest whole percent.)

geometry
In triangle FGH, the measure of angle F is 42 degrees and an exterior angle at vertex H has a measure of 104 degrees. What is the measure of angle G?

physics
explain why a child on a swing comes to rest directly below the top of the swinng

physics
a 1000 kg car is driven at 20 m/s. How many seconds would it take a 2000 N force to stop the car?

English
"Christina Nehring makes allusions to classical myths and 18th and 19th century writers in her essay "Fideltiy with a Wandering Eye". How do these allusions support her argument about women and sex? ALSO How effective are these allusions"

3 grade math
1 at 12 noon, leslie recorded the temperature as 56F. the temperature had increased by 8F from 10 A.M. the temperature at 8 A.M. was 2F warmer than it was at 10 A.M. what was the temperature at 8 A.M? MY Son write the answer is  62F 2 the temperature at

algebra
Graph the solution set for the system of linear inequalities y=2x6

Physics. PLEASE HELP!!
A Ferris wheel rotates 4 times each minute and has a diameter of 17 m. The acceleration of gravity is 9.8 m/s2. What is the centripetal acceleration of a rider? Answer in units of m/s2

Income tax
Interest payers (banks, savings and loans, insurance companies, etc.) report interest earnings to taxpayers on a: A. Form W2INT. B. Form 1099INT. C. Form 1099INC. D. Form 4070. is it A

Chem (Thermodynamics)
Calculate the temperature (in ºC) to which silver ore, Ag2O, must be heated to spontaneously decompose the ore to oxygen gas and solid silver metal at standard state. (ΔHºf of Ag2O(s) = –31.05 kJ/mol; Sº values: Ag(s), 42.55 J/mol•K; O2(g), 205.1

PHYSICS
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 28.0 in a direction 60.0 west of north. Jane walks 10.0 in a direction 30.0 south of west. They then stop

income tax
The tax liability for a married couple with taxable income of $87,312 is: A. $18,068. B. $16,599. C. $14,081. D. $14,078.

AP CHEMISTRY
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH. a)hydrobromic acid (HBr) b)chlorous acid (HClO2) c)benzoic acid (C6H5COOH)

Chem (Thermodynamics)
The standard molar enthalpy of fusion and the standard molar enthalpy of vaporization of benzene are 10.9 kJ/mol and 31.0 kJ/mol, respectively. Calculate the standard molar entropy changes for the solid ↔ liquid and liquid ↔ vapor transitions for

Calculus (Area Between Curves)
Find the area of the region bounded by the curves y^2=x, y4=x, y=2 and y=1 (Hint: You'll definitely have to sketch this one on paper first.) You get: a.) 27/2 b.) 22/3 c.) 33/2 d.) 34/3 e.) 14

Physics
One kilowatthour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour. A kilowatthour is the unit of energy used by power companies when figuring your electric bill. Determine the number of joules

calculus
Determine the intervals on which f(x) is continuous f(x)=15sin(x^2+71)

Chemistry
Consider the reaction in aqueous solution: 6 HCl + 2 KMnO4 + 5 H2O2 > 5 O2 + 2 MnCl2 + 2 KCl + 8 H2O 1.) Write the total ionic equation. 2.) Write the net ionic equation. 3.) For each species (molecule or ion) in the net ionic equation, assign oxidation

math
if f(x)=5x+2 and g(x)=3x4,find (fog)(x)

managerial economics
Qd=15.00.2P where Qd is annual quantity demanded in millions of units and P is the wholesale price. Incurred cost of $60 million. Production cost is $5/unit. (1) what is wholesale price, (2) production annually, (3) annual profit? Given this is a monopoly

math 6th
8x10=80 90x5450

math
the book has a mass of 2 kilograms. what is the mass of 3 of these books?

algebra
3 pencils cost $.03 more than 2 pen,and 1 pen and 10 pencils together cost $2.40.Determine the cost of each writing tool

math 2nd grade
Dwayne eats 1/9 of the raisin bread. Francisco eats 1/3 of the raisin bread. Who eats more raisin bread?

physics
A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it take to reach its maximum height?

Math
A pipe tapers 0.75 inches for every 30 inches of length.Use a constant of direct variation to determine the amount of taper of a 105 inches length. I need help with finding a constant of direct variation.

Chemistry 12  Gases
What volume of oxygen (at 82.1 oC and 713 mmHg) will be produced by the decomposition of 5.71 potassium chlorate? i am not sure what the unit is on the 5.71 ( cause it's not given) so that's not a typo.

Calculus AP need help!
its difficulty problem. find dy/dx by implicit differentiation 1.4 cos x sin y = 1 2.tan(x/y)= x+y

math 2nd grade
Makoto and Otis each decorate diamond patterns that are the same size and shape. Makoto deoorates 1/8 of a diamond. Otis decorate 1/4 of a diamond. Who decorates more

physics
In this current of 12 volts, the voltmeter registers a voltage drop of 4 volts across 1 resistor, what is the voltage drop across the other resistor?

Math
Can someone please tell me Why is (4x + 5) (2x  1) + (x  9) (2x  1) not in factored form? What is the correct final factored form? What is this factoring method called?

Calculus
Let f(x)=(2x^3x^2+2x+1)/(x^2+1). What is the equation of the oblique asymptote of f(x)? Can someone show me how to do the long division one for this question. I have always used synthetic division but realized there are some questions that require to do

homonyms
what is the homonym 4 urn

Calculus AB
Evaluate the indefinite integral of (ln(x))/(x + xln(x)) dx by using variable substitution. Show all steps of your work.

Calculusderivatives
f(x) = (x1)^(2/3)*(x+3) What are the critical numbers? the derivative would be =2/3(x1)^(1/3)(x+3) + (x1)^2/3 What do I do next?

Physics. PLEASE HELP!!
A small, spherical bead of mass 1.9 g is released from rest at t = 0 in a bottle of liquid shampoo. The differential equation of motion is dv/dt = g−b/m*v . The terminal speed is observed to be 1.6 cm/s. The acceleration of gravity is 9.8 m/s2 . Find the

English
Are the verbs in these sentences passive voice, weak or past tense. My answers: 1. The book was informative but too long.weak or past or both?? 2.The teachers have sent the book to the publisher.past 3.The essay has been shortened by ten pages. past

chemistry
ndicate whether each solution is acidic, basic, or neutral. a. [H3O+] = 6.9 x 101 M This solution is acidic. b. [H3O+] = 8.2 x 1013 M This solution is basic. c. [H3O+] = 3.2 x 101 M This solution is acidic.

PHYSICS
The total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

algebra
how do you find the square root symbol on the computer

chemistry
alculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH] = 8.9 x 105 M 1.1E10 b. [OH] = 3.8 x 103 M 2.6E12 c. [OH] = 4.8 x 1012 M 2.1E3

math
Stephen had 4 3/8 pizza at his party. If each person ate 1/8 of the pizza, how many people ate pizza at Stephens party?

Math
100Ã—431Ã·8576234+65454Ã—443321167899= [this might be hard]

algebra
(3x34x2 x+6) Divide By (x2) its 9three x cubed negative 4 xsquare x+6) divide by (x2)

question
anyone who knows that the school of journalism in Indiana university is a good one? how about the major public relation in the school?

Chemisty
Identify the limiting and excess reagent for each of the following scenarios involving the formation of silicone dioxide, SiO2. If you could just get geared in the right direction that would be wonderful. I am just a bit confused with this question. Thank

calculus
Determine values of a and b that make the given function continuous . 16sinx÷x f(x)= a bcosx It's a bicewise function

math
A 4 1/2ft ribbon is cut into 6 equallength pieces.How long is each piece?

Calculus AP need help!
i don't know how or what to starts Find the slope of the tangent line to the curve 4x^2+3xy+3y^3=251 at the point (4,5)

college calculus
how do i solve sin(x)+2cos(2x)=0

chemistry
Calculate the pH of a 0.0019 M HNO3 solution.

social studies
can you recommend some websites that would be good to find out information on the peaceful transition of power (election of 1808), stronger federal government (federalist party belief in stronger government), foreign policy (waging the war of 1812), and

geometry
if a is (3,0) and b is (11,6) and ab is 2x+4 then what does ab equal?

algebra
f(x) = 14x, (gof)(x) = 52x find g(x)

Accounting
If Tom, an accountant, agrees to provide accounting services to Carl, a friend, in exchange for Carl fixing Tom's office floor, then: (Points : 1) Tom must report income on his tax return. Carl must report income on his tax return. Neither Tom nor Carl

filing names
I have a practice work sheet and I have asked people to explain to me and I still just don't get it ... so I am really wanting someone to explain the answers to me and why they are right. All it says on directions is choose the correct place for name. I

physics
A spring gun (k = 26 N/m) is used to shoot a 56g ball horizontally. Initially the spring is compressed by 17 cm. The ball loses contact with the spring and leaves the gun when the spring is still compressed by 12 cm. What is the speed of the ball when it

algebra
5z2

chemistry
a. How many moles of NaOH are present in 89.6 mL of 0.714 M NaOH? 6.40E2 b. How many moles of HCl are present in a 30.0 mL sample that is neutralized by the 89.6 mL of 0.714 M NaOH? 6.40E2 c. What is the molar concentration of the HCl solution described

chemistry
Calculate the pH of a 0.0019 M HNO3 solution. 2.7

Math Exponent Laws.
Simplify, "put the power into a single positive exponent." (2)^0*(2)^3*(2)^4/(2)^3 please help I am so lost on how to solve this problem!! I have been trying to figure it out for days. the  in front of the (2) is very confusing.

Adv. Function math
How would you set up this problem if instead of using 1000 feet of fencing, only 750 feet of fencing is used? Solve the problem to find the maximum area..

strayer
You are playing Guess Your Card with three other players. Here is what you see: •Andy has the cards 1, 3, & 7 •Belle has the cards 3, 4, & 7 •Carol has the cards 4, 6, & 8 Andy draws the question card, “Do you see two or more players whose cards

algebra 2/math
how do i factor x^3+2x^2x2

logic application
You are playing Guess Your Card with three other players. Here is what you see: •Andy has the cards 1, 3, & 7 •Belle has the cards 3, 4, & 7 •Carol has the cards 4, 6, & 8 Andy draws the question card, “Do you see two or more players whose cards

Calculus (Area Between Curves)
Find the area of the region bounded by the curves y=x^(1/2), y=x^(2), y=1 and y=3. You get: a.) 1/2(sqrt(3)) + 4/3 b.) 2(sqrt(3))  8/3 c.) 1/2(sqrt(3)  32/3 d.) 2(sqrt(3))  32/3 e.) 8/3  2(sqrt(3))

chemistry 12  gases
The molecular formula for this compound (14.37% H, density of 1.13 g/L at 24 C and 743 mmHg) is C_H_ I am not sure how to use this information

Binomial expansion
The coefficient of x^2 in the expansion of (43x)^n as a series of ascending powers of x is 9/64. Show that n satisfies the equation 4^(n+1)=2/[n(1n)] and hence verify that n=1/2. I can do the first part of the problem: 4^n*3^2*n(n1)/2!*2^4=3^2/2^6

Calculus AB
The integral from a to b of f(x)/g(x) equals ln[(g(b)/g(a)]. Find g'(x), and explain your reasoning.

stats
a sample of 16 atm transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transactiontime exceeds 60 seconds

math
how to find the area of a square

Chemistry(Urgent, please check!!!)
The equation A + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be? My answer is k(A)(B)^2 Is this correct?

trig
Expan each of the following using the compoundangle formulae:sin(x + 20degree)

Chemistry
What how can I calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)>2 KAl(OH)4 (aq) + 3 H2 (g) Please show steps ..

chemistry
Your percent

Statistics/Chi Square
I have a question to do in which the efficacy of a drug used to treat panic disorder is tested. Patients are given a placebo for one week and then the drug for one week, and the number of panic attacks is measured for each week. The data looks like this:

Chemistry
How many moles of chlorine are needed to react with 2.5 moles of sodium?

Chemistry
What are the boiling point of a solution prepared by dissolving 2.40g of biphenyl(C^12H^10) in 75.0g of benzene? The molecular weight of biphenyl is 154..

physics
A ball of mass 540 g hangs from a spring whose stiffness is 155 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is

Chemistry
What are the boiling point of a solution prepared by dissolving 2.40g of biphenyl(C^12H^10) in 75.0g of benzene? The molecular weight of biphenyl is 154..

Math
simplify 5^0 1 (5^2)^4  *  /  5^6 5^11 (5^10)^2

math
a textbook has 50 more than two times the number of pages as a workbook. combined, they have 230 pages. how many pages are in the textbook?

math
what is x? x + 2 11/14 = 5 13/21 basically, i want to know the formula to finding x. i tried to change the fractions to eqivalent fractions... any other ways?

math
Why do my numbers scramble when I post math homework into my classroom forum posting box when I click on post message?

physics 101
A horizontal force of magnitude F = 164 N is used to push a box of mass m = 7 kg from rest a distance d = 17 m up a frictionless incline with a slope q = 31°. How much work is done on the box by the gravitational force during this same displacement?

English
ms. sue i wrote out this story i read in class in word document u please read it and help with questions? if only you not mind.

Chemistry 12  Gases
A gas is initially at 345 K, 821 torr, and occupies a volume of 5.85 L. What volume will the gas occupy if the temperature and pressure decrease, respectively, to 7 degrees celsius and 0.921 atm?

HELP PHYSICS!!!!
a worker pushes a 7kg shipping box along a roller track. assume friction is small enough to be ignored because of the rollers. the worker's push is 25 N directed down and to the right at an angle of 20 degrees. 1. determine the horizontal component of the

Biology
Jessica has no dimples and attached ear lobes. Jessica's mother has dimples and detached ear lobes, and her father has no dimples and attached ear lobes. Assuming independent assortment, what are the chances that her new baby brother will have dimples and

English
Writeacher, here are my sentences on phrasal verbs I urgently need you to check. Thank you. 1) I can’t get around to thanking you for your hospitality.I’ll get back at you for being so rude to me. 2) When will you get around to clearing your room?He is

trig
8cos6xsin6x

Math
Write an equation of the line with yintercept 4 that is parallel to the line whose equation is y=3x+2

PreCal
Convert the given exponential function to the form indicated. Round all coefficients to four significant digits. f(x) = 9e^3x; f(x) = Ab^x How do i solve the equation with this formula? Thanks

chemistry
what are the charges on the metals? MgSO4 NiSO4*6H2O CoCl2*6H2O could you just explain how you determined the first one? I can take it from there.

Business Math
How long will it take a $400 investment to be worth $700 if it is continuously compounded at 12% per year? I got the answer 6.71 years, but it was wrong, using the A=Pe^rt Thank you

Spanish8th grade
I'm having a problem answering some questions we're learning about shopping and stuff like that so could someone check these please. 1. ¿Qué buscas cuando vas te compras? Busco variedad de cosas cuando voy me compro. 2. ¿Quien es la persona mas de moda

Math
How long, to the nearest year, will it take an investment to triple if it is continuously compounded at 18% per year? I used A=Pe^rt to get the wrong answer 20 years. Don't understand what is wrong Thanks

chemistry
The voltage generated by the zinc concentration cell described by, Zn(s)Zn2 (aq, 0.100 M)Zn2 (aq, ? M)Zn(s) is 23.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode.

Math
How should I approach this, what formula do I use to solve and how do I solve it? How long, to the nearest year, will it take me to become a millionaire if I invest $3000 at 9% interest compounded continuously? Thanks

Algebra
My investment in website #1 stocks is losing half its value every 2 years. Find and interpret the associated decay rate. Round your answer to one decimal place. How do i find this? Do I use the halflife formula? Because I got it wrong I got 25% Thank you

math
Jack's yard is a rectangle 105 feet by 212 feet. Using frontend estimation on the dimensions, what is an estimate of the area of this yard?

PreCal
This exercise is based on the following table, which lists interest rates on longterm investments (based on 10year government bonds) in several countries in 2008. Assuming that you invest $12,000 in the Japan(1.5%), how long (to the nearest year) must

PreCal
This exercise is based on the following table, which lists interest rates on longterm investments (based on 10year government bonds) in several countries in 2008. How long, to the nearest year, will it take an investment in Germany(4.3%) to triple its

PHYSICS
A 50KG BLOCK IS BEING PULLED BY a 200N FORCE ON A HORZONTAL ROUGH SURFACE AS SHOWN IN DIAGRAM.IF THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BLOCK AND THE SURFACE IS 0.3. FIND THE ACCELERATION OF THE BLOCK

chemistry
What is the color of a neon light?

PreCal
If the interest on a longterm Canadian(3/8%) investment is compounded continuously, how long will it take the value of an investment to triple? (Give the answer correct to two decimal places.) Got 19 yearsits wrong, can't find reason. Thanks.

Kinesology
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?

math
How many people would it take to produce a human pyramid 12m tall? Give various methods

English
Here are the other sentences.Thank you. 1) She took on responsibility for the whole family.She forgot to turn down the gas and burned her dinner. 2) How many people turned up at your party? That child is bringing up food. She brought up three children

science
Explain why one must the absolute temperature scale to solve gas problems

chemistry
Calculate the cell potential for the following reaction as written at 53 °C, given that [Zn2 ] = 0.862 M and [Ni2 ] = 0.0110 M. Standard reduction and oxidation potentials can be found here. Zn(s) + Ni^2+(aq) > Zn^2+(aq) + Ni(s)

chemistry
why does a sodium street lamp give off a different color light than a neon light?

Calculus
what is the curve given by the equation x^3=3xy^2+y^3=1 what is dy/dx?

Constitutional Law
What authority stems from the necessary and proper clause? just wanting some links that will help get the ball rolling please.

physics
if the force applied perpendicularly on a given surface is applied on a small area then pressure is?

geometry b
find the area of a triangle with base of 5 and a height of 3 and 3/4

physics
liquid pressure is independent on the? a. shape of the containing vessel b. area of the bottom of the containing vessel c. both a and b and d d. height of the containing vessel

business economics
what does fiscal and monetary policies mean

PHYSICS
A 50KG BLOCK IS BEING PULLED BY a 200N FORCE ON A HORZONTAL ROUGH SURFACE AS SHOWN IN DIAGRAM.IF THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BLOCK AND THE SURFACE IS 0.3. FIND THE ACCELERATION OF THE BLOCK

physics
describe how would you find the dencity of a human

Science
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?

Math
A scale drawing of a house is 15 cm high. If the drawing was built with a scale of 1 cm: 2.5ft, how high was the actual house

English
how would you edit, misty could you walk ms millers dog on tuesday mom asked

Algebra 2
What is each product or quotient in simplest form? a) √3(4√3) b)√x^3/3√x^2 c)√7(3√7)

ALGEBRA II
factor (2x^2  48)

Math Help Please!
My investment in Edgewater stocks is losing half its value every 2 years. Find and interpret the associated decay rate. If I use the formula y=100(1/2)^x (

Prob&stats
Search results for: Using numbers 120 what is probability a randomly chosen number is either an even number or a number greater than 14?

Physics
In the figure below, assume that the slope is frictionless and that the two blocks are connected by a massless cord. Assume the following: θ1 = 37° θ2 = 45° m1=3kg m2=0.86kg. What is the tension in the cord?.

trig
Find the value of theta (in radians) corresponding to the point (6,8)

Writing
Need help completing a 57 page paper on the importance of Academic Honesty with proper APA format with 35 peer reviewed references

math
A contactor is making preparations to retile the border around a swimming pool. The pool measures 60 feet by 30 feet. The border extends 1 foot from each side of the edge of the pool. The contractor is going to use that are 0.25 feet squared. A case of

math
what is the area of a triangle with 18 inches and the height is 12 inches she wants to cover the flag with red contruction paper how many square inches of paper will she need?

Chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 103 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 104 C. 4.49 D. 4.84 X 103 E. 0.223

math
The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?

Chemistry
Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 103 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 104 C. 4.49 D. 4.84 X 103 E. 0.223

HIS/115
Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?

Chemistry
For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200C. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? A. 0.172 B. 0.150 C. 5.82 D. 6.67 E. 2.59

Math
Express the following as a fraction with a single denominator: 1/(2a3)  2/(32a) + 18/(94a^2)

Math
henry is 5ft tall and casts a shadow that is 15ft long a tree next to henry casts a 324ft long shadow. how tall is the tree?

Physics help?
The total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

Prob&stats
Search results for: Using numbers 120 what is probability a randomly chosen number is either an even number or a number greater than 14?

algebra
Find the solution to 36z^2+96z+15=0

science
Two bricks having a 22N force applied on them and each brick having a friction of 1N ,the first brick with the mass of 2kg and the second one having a mass of 3kg.calculate the acceleration that the first brick expiriences

algebra
(5,2,) end point (7,5) mid point, how do I find another end point?

ALG2
x2 + bx + c and ax2 + bx + c could you factor this and explain it.

Science
Why is there no real surface of the sun?

WORLD HISTORY
My teacher ask us to draw a picture that represents a command economy what can I draw??

algebra
Simplify 5m  13n  n + 4m.

physics i need help ASAP
A ship leaves the island of Guam and sails a distance 265 km at an angle 41.0 north of west. ***In which direction must it now head so that its resultant displacement will be 130 km directly east of Guam? (Express your answer as an angle measured south of

poetry
who are the "fools" mentioned in the poem "Trees"; poets, gods, trees, robins

math
In polk middle school, 45% of the students are 6th graders, 35% of the students are 7th graders and the remainder are 8th graders. Would a circle graph of this data that had 3 sections each with a central of 120% be misleading?

5th grade Math
Insert parentheses in the false number sentence to make it true. 3+5*2(6)=37

physics
You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

physics
You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

Math
undefined is what % of undefined?

physics
An apple falls from an apple tree growing on a 20° slope. The apple hits the ground with an impact velocity of 14 m/s straight downward. What is the component of the apple's impact velocity parallel to the surface of the slope?

math
if the width of a baseball field is 40 meters and the perimeter is 120 meters what is the length?

math
What can 32 and 45 both be divided by?

math
i need help doing these type problems.... example 3 1/3 2 1/2=

math
JUDY & RAMEY TOGETHER HAVE 42 STUFFED ANIMALS. JUDY HAS 12 FEWER ANIMALS THAN RAMEY. HOW MANY STUFFED ANIMALS DOES EACH GIRL HAVE?

ALGEBRA II
(3b2)/(b+1) = (4) (b+2)/(b1) The (b+2)/(b1) is separate from the 4. the 4 isn't included in the division

math 2nd grade
simon ate 3/2 slices of an apple. Did he eat less than a whole apple or more than the whole apple. Draw a picture to show your answer

math
what addition fact can help you find 144? explain

science
An apple is dropped from a window 20 m above the ground. How long does it take the apple to reach the ground? What is its final speed?

Chemistry
A particular reaction has an activation energy of 51.6kJ/molrxn. How much faster is the reaction at 50 degrees C versus 25degrees C? I do not know how to start this!

Science help!
adding magenta and yellow dyes makes what color? At first i thought it was red. but when I realized we are adding dye's not light im thinking its black.. but im not sure! please help!

Math please help urgent !
Find the slop of the tangent to the curve y=(10sqrt x)(5+sqrt x) at x=25

math
valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

calculus
Find the volume when the area bounded by f(x) = xe^x, y = e, and the yaxis, is revolved around the yaxis.

English
Thank you. I left out the following phrasal verbs. I added a paragraph on youth cultures I also need to prepare. Thank you. 1) I couldn’t get off last night. It must have been the coffee. His lawyer managed to get him off. He got off/away with a fine. 2)

elementary algerba
add 3y5 to y+16

English
I left out a few sentences. Thank you very much, Writeacher. 1) ames is particularly interested in the language of youth. He believes that the greatest influence on teenagers is the media. It’s the constant bombardment from advertising that youth cannot

algebra
Can someone please show me how to solve this problem step by step thanks an advance sqrt 7x sqrt 21y multiply then if possible simply by factoring

math/algebra
three fourths = seven tenths = two thirds = eleven twentieths = five eights = twenty one twenty five =

Physics
A beam with a length of 7 m and a mass of 110 kg is attached by a large bolt to a support at a distance of d = 3 m from one end. The beam makes an angle θ = 30° with the horizontal, as shown in the figure. A mass M = 492 kg is attached with a rope to one

3 grade english
graphic sources are sources of information such as maps charts illustractions,and captions. graphic sources help us understand information in a text,or they can provide information on their own. directions read the following chart. then answer the

chemistry 103
what is electron cofiguration?

math
four more than a number is 12

math
Okay,whenever I ask jiska for math help.. or any help I ALWAYS get those questions wrong .

chemistry
2Al(S)+3H2O(g)>Al2O3(s)+6H2(g) A.) what is the correct equilibrium expression?

Math
4 students each wrote 2 number patterns Shandi 3,6,9,12... 5,15,20,25 Latrell 1,3,5,7...3,5,7,9 HongLi 0,1,3,6...1,2,4,7 Adriano 2,3,5,7...11,13,17,19 Which student's number patterns used only prime numbers? A.Shandi B.Latrell C.HongLi D.Adriano D?

Math
simplify the expression: 92x+10

statistics
We have a group of 75 people and for their raw scores, you are given the Mean (M = 30) and variance (VAR = 16). Assuming a normal distribution of scores, what is the probability of randomly selecting a score between 27 and 31 for this group?

math 2nd grade
valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

spelling
What kind of sentence can you make with the word " whose"?

Physics
If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?

physics
Ayesha exerts a force of 186 N on a lever to raise a 2.70 × 103N object to a height of 29.0 cm. If the efficiency of the lever is 83.3 percent, how far does Ayesha move her end of the lever?

MATH
ELLE IS MAKING A PATTERN.SHE IS USING RECTANGLES 1 CENTIMETER WIDE AND 2 CENTIMETERS TALL. WHAT WILL BE THE PERIMETER OF THE SIXTH SHAPE IN THE PATTERN?

1st grade math
what addition fact can help you find 144? explain

algebra
Annual profit in thousands of dollars is given by the function, P(x) = 12x  100, where x is the number of items sold in thousands, x ≥ 10. 1.describe the meaning of the number 12 in the formula, in terms of its meaning in relation to the profit.

English
1. Paul visited me in order to ask for a help. 2. Paul visited me in order to ask for help. (Which one is correct? Do we have to put 'a' before 'help' or not?)

mathmatrix
solve using the gaussjordan method. x2y+4z=7 x+3yz=1 2x+y=2 *I get through the first two columbs, but can't get the third one to the one and zero.

chemistry  Molar enthalpy
When 10.0 g of KOH is added to 100.0 g water, the solution's temperature increases from (25.18 C) to (47.53 C). What is the molar enthalpy of solution for KOH? i tryed q=(m)x(c)x(delta T) didn't really work. i got 22.35 J do i use that to find the molar

World History
Can't figure these two out: 35. Rivalry among various sections of a country ? 38. Bombings and assassinations of high officials by political groups ? Thanks MC

Algebra 2
if one class had 20 students participating in the taste test and each student's rating is represented as ak, how do you write the formula for finding the mean rating using summation notation?

english
George Washington Carver's work on soil improvement and plant diseases helped the South and its recovery from the effects of the Civil War. Is it a simple, complex, or compound sentence?

English
1. I took a shower so I felt refreshed. 2. I took a shower so that I felt refreshed. 3. I took a shower, so I felt refrewhed. (What does #1 mean, #2 or #3? In Sentence 1, there is no 'comma' before 'so.' In Sentence 1, we cannot see 'that' after 'so.')

Math
I am having a hard time understanding the difference between discrete and continuous data...i have read the textbook definition and i have looked online, and i just cannot comprehend it :( help?

Geometry
Richard is flying a kite. The kite string makes an angle 57 with the ground. If Richard is standing 100 feet from the point on the ground directly below the kite, find the length of the kite string.

Geometry
An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation? 1 mile = 5,280 ft

ALGEBRA II
George jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?

spanish
complete the blank with the correct form of verb. Un equpio ___________ y el otro gana. (perder) i know it means one team wins and the other loses i just cant figure out the verb tense

math
Mary said that the best unit of measure to weigh her cat was ounces.Is she correct? Explain.

Begley
A person lifts a 4.1 kg cement block a vertical distance of 0.79 m and then carries the block horizontally a distance of 13.30 m. (a) How much work is done by the person in the process? (b) How much work is done by gravity in the process?

English
I urgently need you to check these sentences on the use of the present perfect. Thank you. 1) I’ve never messaged my friends in another country or posted a message on a message board.I have never missed meals because of the Internet and have never spent

Finance
A firm has an opportunity to invest in a new device that will replace two of the firm’s older machines. The new device costs $570,000 and requires an additional outlay of $30,000 to cover installation and shipping. The new device will cause the firm to

geometry
the following coordinates: J(6, 3), K(3, 7), L(6, 7), and M(3, 3). What is the perimeter of parallelogram JKLM?

HELP ON MATH PLEASE!!!!!!!
John jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?

5g maths
to estimate the adult height of a child you can multiply his hight at age 2 by 2 when he was 2years old about how tall was a 75inch tall man

english
after the had reached the museum is this a subordinate or and independent clause?

physics
1A) A filament lamp cost 80p effiency 0.2 expected life 1000 hours a compact fluorescent lamp (CFL) cost £3.00 effiency 0.8 expected life 8000 hours a filament lamp with a power rating of 100W gives 2000 units of light. what power rating would a

Chem (electronegativity)
Calculate the E°cell for the following voltaic cell (use the standard electrode potentials given on page 829 of the textbook, or from some other source): Ni(s) + 2 Ag+(aq) → Ni2+(aq) + 2Ag(s) ====================== I got 0.55 as my answer. Ecell is

English
Writeacher, I left out these sentences on the same topics. I included various possibities. Thank you. 1) Sorry, I’ve been out of touch. (Sorry, I haven’t been in touch is the same? How are things with you? Any good news? I’ve been busy with my mum

algebra
what is this answer I am an even number i am less than 65,but greater than 50 I am divisible by 5

MATH
MRS. M IS GOING TO PUT DOWN TILES ON HER KITCHEN FLOOR. SHE PLANS TO USE A PATTERN WHERE THERE WILL BE 3 SQUARE TILES FOR EVERY 1 TRIANGULAR TILE. IF SHE USES A TOTAL OF 900 TILES, HOW MANY OF THOSE ARE IN TEH SHAPE OF A SQUARE?

Math
I am confused with this problem, A 14.1 oz box of cereal costs $2.89. Find the constant of direct variation I don't know how to figure out the constant of direct variation and i need help.

Math
Explain in writting how to divide .12 by 8. (without using fractions) fifth grade

algebra
To solve ax = b for x multiply both sides of the equation by?

spanish
te gustan los deportes? si te gustan si me gusta si me gustan which one is the correct response

chemistry
A What mass of KCl is needed to precipitate the silver ions from 26.0 mL of 0.100 M AgNO3 solution?

MATH
veify that each equation is an identity cos2x+tan2xcos2x=1 sin4xcos4x/sin2x=1cot2x

chemistry
3.30 mL of vinegar needs 43.0 mL of 0.150 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.70 qt sample of this vinegar?

HARDEST MATH QUESTION IN THE UNIVERSE
James jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?

Chemistry
Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l) ¨ 2 KAl(OH)4 (aq) + 3 H2 (g)

algebra 2
solve for x. x+3.5=2.5

statistics
Suppose that 2,000 scientists compute 90% confidence intervals for parameters they are interested in. How many of these intervals would we expect to successfully capture their parameters

math
I need help with the math textbook stretching and Shrinking page 89, questions 33 and 34. THANK YOU TO WHOEVER HELPS ME :D

chemistry
which of the following are non polluting: renewable sources coal nuclear fuels or oil?

Chemistry
Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)>2 KAl(OH)4 (aq) + 3 H2 (g)

Physics. PLEASE HELP!!
A Ferris wheel rotates 4 times each minute and has a diameter of 17 m. The acceleration of gravity is 9.8 m/s2. What is the centripetal acceleration of a rider? Answer in units of m/s2

math
25 guests attended the first party. 33 guests attended the second party. What is the percentage increase in the number of guests from the first to second party?

calculus
determine the intervals where f(x) = ln(6x24) is continuous

physics! HELP!
A filament lamp cost 80p effiency 0.2 expected life 1000 hours a compact fluorescent lamp (CFL) cost £3.00 effiency 0.8 expected life 8000 hours a filament lamp with a power rating of 100W gives 2000 units of light. what power rating would a CFL

Calculus implicit
find y' by implicit differentiation. i don't understand, its so complicate. 1. 4cos(xy)=3ysinx 2. 4sin(xy) =3ysinx

Immediate accounting
On June 1 2009, ABC sold an accounts receivable in the amount of $200,000 to XYZ bank for $190,000. The sale is "with recourse". ABC estimates that the fair value of the recourse obligation is $12,000. Provide the journal entry for the sale of the

Chemistry
How many moles and how many grams of potassium alum, KAl(SO4)2 · 12 H2O, can be prepared from 5.00 g of aluminum?

Math
A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

math
The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? This is the last question for my homework could u answer this

Chemistry
Calculate the percent yield of alum if you obtained 75.0 g of potassium alum from 5.00 g Al.

physics
PLS HELPPPPPPPPP You are camping with two friends, Joe and Karl. Since all three of you like your privacy, you don't pitch your tents close together. Joe's tent is 15.0 from yours, in the direction 26.0 north of east. Karl's tent is 26.5 from yours, in the

Chemistry(Please check)
If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given I chose 2 as the answer. Is this correct?

chem
experimental error is part of any experiment.suggest two possible sources of error on the experiment of the mole ratio of NaCL to that of NaHCO3.

IUP
A Circular metal loop is 28.0 cm in diameter. how large a current must flow through this metal so that the magnetic field at its center is equal to the earths magnetic field of 5.00*105T?

Microbiology
Nucleoside analogs and ionizing radiation are used in treating cancer. These mutagens can cause cancer, so why do you suppose they are used to threat the disease?

bio
In 3 or more sentences describe the structure of a water molecule and its unique properties

geometry
Mr. Horn purchased a cylindrical aquarium for his office. The aquarium has a height of 25 1/2 inches and a radius of 21 inches. What is the volume of the aquarium in cubic feet?

Physics
the total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

baseball
in baseball they have nine times entrances bases?

Chemistry
I need to find the volume of 5.44 molar nitric acid needed to completely react with 6.27 grams of Ca(OH)2.

chemistry
What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2? (Consider the equation CaF2(s) + 2H+(aq)> Ca2+(aq) + 2HF(aq) and solve the equilibrium problem)

algebra
Input 7, 8, 9, 10, 11 Output 18, ?, 25, ?, ? Can you help please Thanks

calculus
x (to the power of 3) + 40 / y  (10 + 3) what is the value of the expression when x=4 and y=8?

physics
if 12,000 j of work is used to raise a large crate to a 4.1 m high shelf in a warehouse, then what was the weight of the crate of newtons?

Tax
Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of $4,782. His tax liability for the year was: A. $1,244.

Tax
Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of $4,782. His tax liability for the year was: A. $1,244.

income tax
Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of $4,782. His tax liability for the year was: A. $1,244.

Gen Chem
Consider the reaction: 2 SO2(g) + O2(g) ↔ 2 SO3(g). If, at equilibrium at a certain temperature, [SO2] = 1.50 M, [O2] = 0.120 M, and [SO3] = 1.25 M, what is the value of the equilibrium constant?

physics
a 70.o kg student runs up a 5.00 meter high stairway in a time of 5 seconds. how many watts of power did she develop?

math11
The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? if the pyramid has 4 sides does each side have 18m?

physics
A ski trail makes a vertical descent of 77 m. A novice skier, unable to control his speed, skis down this trail and is lucky enough not to hit any trees. If the skier is moving at 17 m/s at the bottom of the trail, calculate the total work done by friction

microbiology
all coliforms ferment glucose but none of the media used for this test includes glucose why is glucose not used

Speech
Iambic Tetrameter poem with 8 syllables and 2 stanzas with 4 lines each.

Microbiology
What if you found gas in the Lab tubes but none in the BGLB thow does this affect the EC test

Physics
The drawing shows a skateboarder moving at 5.55 m/s along a horizontal section of a track that is slanted upward by 40.9 ° above the horizontal at its end, which is 0.724 m above the ground. When she leaves the track, she follows the characteristic path

English
Original sentence: The urgent care center offers a variety of services such as physician appointments, mental health, health education programs, and lab and Xray work. My corrections: The urgent care center offers physician appointments, mental health

Physics
A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill, as the drawing illustrates. The crest of the second hill is circular, with a radius of 38.3 m. Neglect friction and air resistance. What must be the height

Physics
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 73 kg, and the height of the water slide is 12.0 m. If the kinetic frictional force does

Speech
Ballad Verse poem with 3 stanzas, 8 lines per stanza and the last line is the same or very similar to the 1st line.

Physics
A highjumper clears the bar and has a downward velocity of 6.00 m/s just before landing on an air mattress. The mass of the highjumper is 50.4 kg. What is the magnitude and direction of the impulse that the air mattress exerts on her? Assume that upward

Physics
Two identical cars (m = 1350 kg) are traveling at the same speed of 23.9 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars?