Friday
October 24, 2014

Posts by ashley


Total # Posts: 2,806

probability
A company manufactured 1, 000 televisions. Testing showed that 20 of the televisons were defective. What is the experimental probability that the next television will be defective?
April 18, 2013

Chemistry
What is the equation for the reaction of potassium soap with HCL?
April 18, 2013

Chemistry
In saponification, does sudsing show after adding acid. Why?
April 18, 2013

Got it right
:0
April 17, 2013

Calculus
Find two positive numbers whose sum is 8 such hat when the cube of th first number is multiplied by the second number, the result is maximum.
April 16, 2013

Chemistry
Give the equation for the base hydrolysis of methyl benzoate by KOH. What are the 2 types of molecules being formed in this reaction?
April 15, 2013

Chemistry
If the molecule triglyceride underwent base hydrolysis, what 4 products would you obtain? Give the condensed formulas.
April 15, 2013

Trig
Solve the multiple-angle equation. (Enter your answers as a comma-separated list. Let n be any integer. Enter your response in radians.) sec 9x = 2
April 15, 2013

Chemistry
A balloon contains 2000mL of helium gas at 300K what is the new volume in mL at 600K
April 15, 2013

Math
Ok, thank you.
April 15, 2013

Math
x^2(3-x)=k. That's the equation.
April 15, 2013

Math
Given that the equation x^2(3-x) has 3 real solutions of k, give the set of possible values for k.
April 15, 2013

anthropology
Chiefdoms are characterized by all of the following except
April 14, 2013

Chemistry
How many grams of NaF should be added to 612 ml of 0.4 M HF (Ka = 6.8 x 10-4) to produce a buffer solution where pH = 3.10?
April 12, 2013

problem solving
ou are completing the final exam in your class. Your instructor’s assignment instructions state that you may only use the following resources: library books, class notes, texts, and the instructor. You and your roommate discussed one of the questions, but you wrote your ...
April 12, 2013

Chemistry
How much energy would be released when 675 grams of steam is condensed to water
April 11, 2013

place vowlue
2 tens and333 hundreds
April 10, 2013

Math
3+3+4+4=14 feet for each window,3 feet wide and 4 feet high.You have 5 windows so what is 5x14?
April 9, 2013

Algebra
Given f(x)=-4+lnx; Find the inverse of f. f^-1=?
April 7, 2013

Math
a curve is such that dy/dx=4x+7. the line y=2x meets the curve at point 'P'. Given that the gradient of the curve at P is 5. State the coordinates of P.
April 7, 2013

math
ONE-NINTH
April 7, 2013

math
1rad=180/pi degrees. so 174=f degrees. cross multiply and get f=174 x 180/pi. where f represents the unknown degrees.
April 7, 2013

MATH
Complete the square method.
April 7, 2013

MATH
ok, divide throughout by logv3 and then you will get a quadratic equation and solve for t.
April 7, 2013

MATH
remember to divide the terms when subtracting in logarithms.
April 7, 2013

science asap
altitude on the horizontal axis and pressure on vertical because the independent variable always goes on the horizontal axis, and in this case pressure changes depending on the altitude.
April 7, 2013

math
What does a lower perfect square and a upper perfect square mean.
April 7, 2013

Math
a curve is such that dy/dx=4x+7. the line y=2x meets the curve at point 'P'. Given that the gradient of the curve at P is 5. State the coordinates of P.
April 7, 2013

Pre-Algebra
6,7,8
April 7, 2013

Math
Yeah it's 1. 22-12-9=1
April 7, 2013

Math
No it is not.
April 7, 2013

math
Write the slope Intercept form of the depletion of the line that contains -4,6 and 6,-1
April 6, 2013

Philosphy
what is the role of the agent intellect? I know it illuminates and then abstracts the phantasm, but not really understanding completely..thank you
April 6, 2013

geometry
LMNO is a parallelogram. If NM = x + 15 and OL = 3x + 5, find the value of x, then find NM and OL
April 5, 2013

Analytical chemistry
A 25.0-mL solution of 0.0660 M EDTA was added to a 33.0-mL sample containing an unknown concentration of V3 . All V3 present formed a complex, leaving excess EDTA in solution. This solution was back-titrated with a 0.0450 M Ga3 solution until all the EDTA reacted, requiring 13...
April 4, 2013

Analytical chemistry
Calculate pCd2 at each of the following points in the titration of 40.00 mL of 0.0040 M Cd2 with 0.0040 M EDTA in the presence of the auxiliary complexing agent NH3. The solution is buffered at a pH of 11.00. Take the NH3 concentration to be a constant 0.100 M. The formation ...
April 4, 2013

chemistry
A 50.00-mL sample of groundwater is titrated with 0.0900 M EDTA. Assume that Ca2 accounts for all of the hardness in the groundwater. If 11.40 mL of EDTA is required to titrate the 50.00-mL sample, what is the hardness of the groundwater in molarity and in parts per million of...
April 4, 2013

chemistry
The concentration of saturated NaOH is 50.0% w/w and the density is 1.52 g/mL. If exactly 8.50 mL were diluted to 1.000 L, what would be the concentration?
April 4, 2013

chemistry
A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 17.65 mL to reach a phenolphthalein end point. What is the molarity of...
April 4, 2013

Analytical chemistry
A 24.393 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 80.601 g of water. A 12.404 g aliquot of this solution is then titrated with 0.1059 M HCl. It required 31.61 mL of the HCl solution to reach the methyl red ...
April 4, 2013

chemistry
The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.4. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq). (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition...
April 4, 2013

chemistry
0.650 L of 0.420 M H2SO4 is mixed with 0.600 L of 0.280 M KOH. What concentration of sulfuric acid remains after neutralization?
April 4, 2013

Chemistry
Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. mono-unsaturated fat c. poly-unsaturated fat
April 2, 2013

physics
block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. When released from rest, block 2 falls 76 cm in 5.2 s (without the cord slipping on the pulley). What is the pulley's rotational inertia...
April 2, 2013

physics
The average rate at which energy is conducted outward through the ground surface in a certain region is 66.8 mW/m2, and the average thermal conductivity of the near-surface rocks is 2.13 W/m·K. Assuming a surface temperature of 8.01°C, find the temperature (in ...
April 1, 2013

physics
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that ...
April 1, 2013

Statistics
A) 0.153 B) 0.753 C) 0.095
March 30, 2013

Philosophy
Show that (P → Q) ↔ (¬P ∨ Q) in fitch
March 29, 2013

Math
thanks
March 28, 2013

Math
What is 9/20 in simplest form?
March 28, 2013

french
I need to complete activity 11 noms et prenoms with the verb appeler, it's French 3 in the la routine quotidienne packet?
March 27, 2013

Chemistry 140A
A gas cylinder containing 6.38 mol of neon has a pressure of 491 mm Hg at 295 K. If 3.22 mol of helium is added to this cylinder, at constant temperature and volume, what will be the pressure in the cylinder?
March 26, 2013

Form a polynomial f(x)
Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i f(x)=a( )
March 26, 2013

College algebra
Form a polynomial f(x) with the real coefficients having the given degree and zeros. Degree 5; Zeros: -3; -i; -6+i f(x)=a( )
March 26, 2013

Find the complex zeros
Find the complex zeros of the polynomial function. Write f in the factored form. f(x)=x^3-3x^2+7x-5 f(x)=
March 26, 2013

Use the intermediate value
Use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=4x^3+6x^2-7x+1; [-4,-2] f(-4)=
March 26, 2013

math
I need help with these two problems please. Completely factor the polynomial. 8x^3+16^2+8x+16 Factor the trinomial completely. y^3-14y^2+48y
March 24, 2013

Science
Which would you measure in millimeters , a capacity of a juice box or the capacity of a water pitcher?
March 23, 2013

Chemistry
At 122C the pressure of a sample of nitrogen gas is 0.830 atm. what will the temperature in Celsius be at 3.00 atm, assuming constant volume ?
March 20, 2013

Biology
What was a event in Darwins life that lead him to the theory of evolution. When i googled it those were the only two that came up. And our teacher told us to not to do those
March 20, 2013

Biology
What was a event in Darwins life that lead him to the theory of evolution. When i googled it those were the only two that came up. And our teacher told us to not to do those
March 20, 2013

Biology
Research and discuss an event in Charles Darwins' life that lead to his theory of evolution. Events could be directly in Charles Darwin's life or could be individuals whose ideas Darwin incorporated into his work. Besides the voyage to Beagle and the visit to the ...
March 20, 2013

Chemistry
In an experiment with a titration of Vitamin C with Iodine, why must the iodine dropper be standardized?
March 19, 2013

Chemistry
A student completed the standardization procedure & found that the value for her dropper was 0.133 mg Vitamin C/dp l2. The student then selected a juice & titrated it with the iodine from the dropper bottle. The sample turned blue with the addition of the 19th drop. How many ...
March 19, 2013

Chemistry
During the standardization procedure of the iodine dropper, a student used 10.0 mL of a 1.00 mg.mL standard of Vitamin C. After adding 41 drops of iodine to the 10.0 mL of the standard, the sample was a deep blue. Calculate how many mg of Vitamin C are titrated by each drop of...
March 19, 2013

Physics
Somehow, I got the right magnitude, but my x and y are different. my x=-21.35 and y=13.9 how?
March 18, 2013

Physics
A charge of -3.66C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.0978 m). The charges on the circle are -4.04C at the position due north and +6.20C at the position due east. What is (a) the magnitude and (b) ...
March 18, 2013

word puzzle
italian
March 18, 2013

geography
thank you Ms. Sue, i appreciate it :)
March 18, 2013

geography
landlocked and high elevation?
March 18, 2013

geography
THANK YOU bolivia-is it because of their high indig. population and poverty? col-coca leaf? central Colombia brzil-#1 producer in oranges, soybean, sugarcane, and coffee. Most common resources include iron ore, aluminum, and gold has complete access to Atlantic ocean\ brasilia...
March 18, 2013

geography
1. Bolivia is pretty isolated--why? 2. Columbia has an important resource--what is it, where is it? 3. Brazil has many resources--where are they? Access? 4. Why is Brazilia a forward capital? 5. What is Cuba's access? Why does the US have a trade embargo against? What ...
March 18, 2013

geomerty
the hexagon GIKMPR and triangle FJN are regular the dashed line segments form 30 degree angles
March 17, 2013

Physics
A 5.81 10-5 H solenoid is constructed by wrapping 62 turns of wire around a cylinder with a cross-sectional area of 8.20 10-4 m2 When the solenoid is shortened by squeezing the turns closer together, the inductance increases to 8.94 10-5 H. Determine the change in the length ...
March 17, 2013

Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
March 17, 2013

Physics
The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
March 17, 2013

Math - Grade 5
A shop sells candies by weight. Monisha bought 2 full bags of chocolates and 3 full bags of gummy bears for $23.50. If 3/4 of a bag of chocolate cost as much as 5/6 of a bag of gummy bears, find the cost of 1 full bag of chocolates.
March 16, 2013

Math - Grade 5
After saving 4/5 of his salary every month, Zacky has $150 left. Micah saves 6/7 of his salary every month. If both guys save an equal amount each month, how much is their combine salary?
March 16, 2013

artist
Is it possible for a band or artist to make topical or political commentary in a song today while focusing on turning a profit?
March 14, 2013

chemistry
I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!
March 12, 2013

chemistry
I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!
March 12, 2013

chemistry
1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3 (total molarity=0.0774) what is the capacity of 200mL of the buffer to survive an addition of HCl without changing by more than 0.4 pH units? i am so lost please help! i know you use the henderson ...
March 12, 2013

chemistry
I need 1L of a pH 4 buffer with a total molarity of 1. Propose a buffer system and a recipe to achieve this goal. (acetic acid/acetate would probably be a good choice.) help please!
March 12, 2013

chemistry
1L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3 (total molarity=0.0774) what is the capacity of 200mL of the buffer to survive an addition of HCl without changing by more than 0.4 pH units? i am so lost please help! i know you use the henderson ...
March 12, 2013

Chemistry
What is the concentration (in M) of an ammonia (NH3) solution if 12.23 grams of ammonia are dissolved to make a 520 mL solution?
March 11, 2013

chemistry
i got a total concentration of 0.0774M is this correct?
March 10, 2013

chemistry
for a i got pH=3.97 and for b i got 3.99 for c and d i am stuck.
March 10, 2013

chemistry
i am suppose to calculate the pH at the new conditions, but i am super lost. also for c and d i think you would have to figure out the moles, but then i do not know what to do from there.
March 10, 2013

chemistry
1L of a buffer composed of NaHC2O4 and Na2C2O4 has a pHof 4.0 and a total molarity of 1. a). what would the effect on the pH be of adding 1 gram of sodium hydrogen oxalate to this buffer? b). what would be the effect on the pH of adding 1 gram of sodium oxalate to the original...
March 10, 2013

chemistry
for LiNO3 i found the ionic strength to be .02M for KClO4 i found the ionic strength to be .05M for NaF i found the ionic strength to be .01M i'm stuck on what else to do from here.
March 10, 2013

chemistry
Find the concentration of Ag+ in a saturated solution of AgBrO3 that also contains 0.02M LiNO3, 0.02M KClO4 and 0.01M NaF.
March 10, 2013

chemistry
for my answer i got 597559.1682 is this correct??
March 10, 2013

chemistry
For the reaction 2A(g) + B(aq) + 3C(l)<------> D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^-2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr Find the numerical value of the equilibrium constant that would appear in a conventional table...
March 10, 2013

chemistry
How do i calculate the pKa??
March 9, 2013

chemistry
How many grams of Na2CO3 should be mixed with 50.00g of NaHCO3 to produce 2000mL of buffer with pH=10?
March 9, 2013

Calculus
square root of (12), square root of (12 + square root of (12)), square root of (12+ square root of (12+ square root of (12))) Write a recursion formaula for an(subcription), n greater than or equal to 2.
March 7, 2013

Management for Organizations
Would someone PLEASE check my answers..THANKS in advance!!! 1. Employee inventories and skills inventories are strategies for ________________________. (D) job design promoting-from-within external recruiting human resource planning 2. Which one of the following choices is not...
March 7, 2013

chemistry
1:1
March 7, 2013

Math
A maple tree casts a shadow of 45 ft long. At the same time, a 40-ft-long oak tree casts a shadow which is 60 ft long. Explain how you can use similar triangles to find the height of the tree. Then find the height of the tree.
March 5, 2013

algebra
the primeter of a rectangle is 24ft. the length is 2 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width. is the answer for the length 14ft and the width 10 ft?
March 5, 2013

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