Sunday

March 29, 2015

March 29, 2015

Total # Posts: 377

**Chemistry**

I already figured out the answer for b) However, can anyone helps me with a)?
*March 24, 2015*

**Chemistry**

Step 1: A 12.70mL sample of cyanide solution was mixed with 25.00mL of a solution of nickel ions at an appropriate pH to form the Ni-cyanide complex. The resulting solution was titrated cs 0.0130M EDTA and required 10.10mL to reach the end point. Step 2: Then 30.00mL of the ...
*March 24, 2015*

**Analytical Chemistry**

No, I am sorry. This is the first time I have posted this question. Where can I find the similar question?
*March 24, 2015*

**Chemistry**

Given that 12.25 g of aluminum sulfide is reacted with excess water. How many grams of aluminum hydroxide can be obtained? The molar mass of aluminum sulfide is 150.0 g and the molar mass of aluminum hydroxide is 78.0 g.
*March 14, 2015*

**Chemistry**

Suppose 0.500 g of sulfur combines with 1.00 g of copper. What is the empirical formula of the compound? The atomic mass of sulfur is 32.065 g and the atomic mass of copper is 63.546 g.
*March 14, 2015*

**chemistry**

When you add 0.320 g of sodium metal to an excess of hydrochloric acid, you find that 3330 J of heat are produced. What is the enthalpy of the reaction as written below? 2Na(s) + 2HCl(aq) --> 2NaCl(aq) +H2(g
*March 9, 2015*

**Math**

How do you go about solving this? If you got paid $15 for 3 hours of work one day and $45 for 8 hours of work on another day, find your hourly rate of pay for the 2 days
*February 19, 2015*

**science**

an arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/san arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/s. How long is the arrow in the air?
*February 2, 2015*

**calculus**

A trough is 9 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x4 from x=−1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required to empty the trough by pumping the water...
*January 29, 2015*

**Chemistry**

How do you set up this problem? Calculate the volume , in ml of a 0.150 M NaOH soulution needed to neutralize 25.0ml of a 0.288 M HCl solution?
*November 23, 2014*

**Chemistry **

Calculate the mass of NH4NO3 salt that should be combined with 100.0 mL of water to obtain a temperature decrease of exactly –15.0C? Delta H of the solution = 24.13 Ccal = 21.12 Csh2o = 4.18 average Qrxn = 1151.6 I dont understand how to solve it
*November 19, 2014*

**Science 8**

A copper bracelet is placed in a graduated cylinder full of water. The water level rises from 15.6 ml to 28.0ml. The mass of the bracelet is 101.7g. Is the bracelet made of pure copper? How would I know? How would I explain?
*November 17, 2014*

**statistics**

It is known that 10 % of a school's athlete population uses drugs. The Athletic Director gives a drug test which registers correctly as positive in 82 % of the cases where the drug is present and correctly as negative in 96 % of the cases where the drug is absent. One ...
*November 10, 2014*

**Language Arts**

What is the theme of the book catching jordan?
*October 27, 2014*

**math**

1. He wants 1/2 pound of chicken so one complete serving. The remainder is 1/4, half of a half is one fourth so the answer is 1 and a half servings. 2. (n ×3/2) ×2 n being the original amount the recipe calls for 3. Use the formula to solve 4.yes oregano, no for ...
*October 27, 2014*

**math**

This is a floor plan of a building that is 8m tall. It has a flat roof. What is the surface area of the building including the roof. The floor plan is starting from the left the side is 18m the bottom is 27m the right side is 22m. The top looks weird butits like three sections...
*September 15, 2014*

**math**

The cost of a DVD is $18.75. Added to this cost is 12% before tax fee. 5% GST, 7% PST. What is the total cost?
*June 24, 2014*

**math**

The cost of a DVD is $18.75. Added to this cost is 12% before tax fee. 5% GST, 7% PST. What is the total cost?
*June 23, 2014*

**economics **

A monopoly firm is faced with the following demand function P = 13 – 0.5Q The Marginal Cost function for the firm is given by 3 + 4Q and the total fixed cost is 4 Determine 1. The the profit maximizing output 2.The level of supernormal profit if any 3. The output level at...
*June 21, 2014*

**Shurley English**

Please help to classify: Before dinner Terry and I played a quick game of cards.
*May 27, 2014*

**computer assisted legal research part 2**

There seems to be 2 answers to #11 of exam #00803701. Not sure which one to use
*May 7, 2014*

**us history**

Explain how wwII promoted an awareness of the links between racism in the US and coloniasm around the world. (in a long essay please)
*March 29, 2014*

**Physics**

Water is boiled by burning coal. The resulting steam blows agains huge turbine blades. The turning blades spin in a magnetic field, producing electricity. Describe in order the energy conversions.
*March 24, 2014*

**Physics**

If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
*February 17, 2014*

**Physics**

The acceleration of a particle moving only on a horizontal xy plane is given by , where is in meters per second-squared and t is in seconds. At t = 0, the position vector locates the paticle, which then has the velocity vector . At t = 3.60 s, what are (a) its position vector ...
*February 3, 2014*

**Physics**

A severe thunderstorm dumped 2.4 in of rain in 30 min on a town of area 35 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
*February 2, 2014*

**Physics**

Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.4 × 103 kg/m3. What mass of sand grains would have a total surface area (the total area of all the individual ...
*February 2, 2014*

**math**

Kim decided she want to put a continuous trim along the top of the walls around the 10 ft. by 10 ft. rectangular room. How long a piece of trim must she buy?
*January 27, 2014*

**SCIENCE (Drugs)**

Dopamine. The neurotransmitter plays an important role in addiction, and acts as adrenaline and affects the ability to feel pleasure and pain, emotional response and movement control. Drugs can affect these abilities by either stimulate or fail to stimulate the receptors of ...
*November 25, 2013*

**Business 101**

1. Carmen Santiago works for a number of businesses as a “consultant.” She has helped design accounting systems, provided accounting services, and analyzed the financial strength of her clients’ businesses. Carmen is working as a A. public accountant. B. ...
*November 17, 2013*

**K math**

What is the factor of 2?
*October 9, 2013*

**Calculus **

Given a power function of the form f(x)=ax^n, with f'(3) = 14 and f'(6) = 28, find n and a.
*October 8, 2013*

**Literature**

What does this poem mean? What is th symbolism? Literary devices? Nothing Stays Put Amy Clampitt The strange and wonderful are too much with us. The protea of the antipodes--a great, globed, blazing honeybee of a bloom-- for sale in the supermarket! We are in our decadence, we...
*September 16, 2013*

**MATH**

For each of the following angles, find a coterminal angle with measure (theta symbol) such that 0 degrees is greater than or equal to theta symbol < 360 degrees. a) -100 degrees. I really do not understand how to work this problem and I need help
*August 19, 2013*

**Math**

For each of the following angles, find a coterminal angle with measure (theta symbol) such that 0 degrees is greater than or equal to omega symbol < 360 degrees. a) -100 degrees. I really do not understand how to work this problem and I need help.
*August 19, 2013*

**physics**

A 1.0-m thin rod of aluminum is laid end-to-end with a 1.0-m thin rod of steel. The rods are initially at 25 oC. What is the total length of both rods when heated to 450 oC?
*July 29, 2013*

**Chemistry**

Yes I would be thank you!!
*July 12, 2013*

**Chemistry**

I had to calculate delta G which came out to be 10.30 then i had to solve for Kp so I used the equation DeltaG=-RT(ln Kp) then I got .01565, now im trying to calculate the equilibrium pressure of O2 and that has me stumped.
*July 12, 2013*

**Chemistry**

Consider the decomposition of a metal oxide to its elements where m represents a generic metal. M2O(s)<->2M(s)+1/2O2(g) the delta G is 10.30 I need to find K and PressureO2 at 298K I know the equations but i keep getting the answer wrong could you please help me. Could ...
*July 12, 2013*

**Math**

Alec, Kate and Ketan are roommates who share living expenses in a ratio of k: 2a: 5k respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution? (A) 280/2a+6k (B) 700/2a+6k (C) 1400k/2a+6k (D) 2800a/2a+6k (E) 7000k/2a+6x Please ...
*June 25, 2013*

**Chemistry**

What's is the concentration of silver ions in a saturated solution of silver carbonate? The k^sp of Ag2CO3 is 8.1x10^ -12. Is the answer 5.88x10^-8? I have a test tomorrow and I really need to make sure I'm doing these problems right, but I feel like I am not.
*May 9, 2013*

**Chemistry**

Calculate the concentration of bromocresol green (BG) indicator It says that Molar absorptivity = Absorbance at a wavelength/ concentration of BG indicator I am having trouble calculating the concentration of BG. Other info: Stock solution of BG = 80.0 mg/L and molar mass = ...
*April 25, 2013*

**Chemistry**

Four particles have free access to distribute into four different energy levels 0,5,10, and 20J. If these four particles are to create two macrostates having total energies 10J and 40J, which macrostate has more entropy?
*April 18, 2013*

**chemistry**

Suppose you do not know the enthalpy of decomposition of the process: CaCO3 = CaO + CO2 Explain in terms of thermodynamic parameters why heating to a high temperature might turn this decomposition to a spontaneous process.
*April 18, 2013*

**Chemistry**

Mopping the floor in a dry weather makes the floor dry quickly although detlaG0 for the water vaporization at room temperature is positive. Explain.
*April 18, 2013*

**chemistry**

find the molality of a salt-water solution containing 0.27 mol NaCl in 150 g water.
*April 7, 2013*

**chemistry**

what mass of K2SO4 would you measure out to prepare 350 mL of a .76 M solution? The gram formula mass of K2SO4 is 174.2 g/mol
*April 7, 2013*

**Science**

What pumps blood
*March 30, 2013*

**physics**

Av/sp = 20 10 = 2m/s
*March 30, 2013*

**Math**

Austin is in his pedal boat. It takes him 1.5 hours to travel 12 miles downstream and 6 hours to return. What is the rate of the current? Please show me how to solve it as well, I really have no idea. Thanks.
*March 10, 2013*

**chemistry**

A lab technician determines the boiling point elevation of an aqueous solution of a nonvolatile, nonelectrolyte to be 1.62°C. What is the solution's molality?
*March 3, 2013*

**Math calculus**

Which box is bigger the 10*4*1 or the 6*4*3 box. Thanks.
*March 3, 2013*

**Math**

Please help me factor this, I just can't get it to work. -12x^2 - 35x - 18 Thanks!
*March 3, 2013*

**Math**

Store B has the best price. A sells for $14 per CD B sells for $13 per CD
*December 19, 2012*

**Custer's Last Stand**

I have only been around for two research days for this big project on Custer's Last Stand, and I have some information and a LOT of books, but I need quick, straightforward info that I can work around. Any solid information you know pertaining to details of Custer's ...
*December 19, 2012*

**math**

I was wondering if someone could double check my work on a test I'm self correcting. Here's the problem, it has to do with Cramer's Rule. 24x + 6y = 11 24x + 60y = -25 I ended up finding the base determinant (D), and then dividing Dx and Dy by D. My answers for Dx ...
*December 19, 2012*

**Math**

How do I find the measurement of side CDin the quadrilateral WVUT if the midpoints are F,E,D,C and WU =45 in. and TV = 31 in.?
*November 14, 2012*

**Philosophy (arguments)**

further develop the following argument: communities in which people spend a lot of time socializing with their friends and neighbors are stronger than other communities. when people have televisions they spend less time socializing with their friends and neighbors. Therefore, ...
*November 11, 2012*

**Physics**

When we lauch a space shuttle will it go with Earths rotationor would it go opposite?
*October 31, 2012*

**physics**

The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 294 kg. A person pushes down on the middle of the front ...
*October 17, 2012*

**Chemistry**

Which of the following transition metal ions has a color? Cr3+ , hg2+, v2+ How can you predict that? I don't understand!!
*October 14, 2012*

**world history**

You're right. I'm Buddhist. I should know.
*October 6, 2012*

**Math**

But the problem says the sum of the ages is 70. And yeah, it is what you could call "unusual." It's really confusing. I think that maybe the question was just typed wrong, and I'm going to ask about it on Tuesday. Thanks for the help, though! At least I know ...
*October 6, 2012*

**Math**

The sum of the ages of Monica and her mother is 70. Monica is 4 less than 1/2 her mother's age. Find their ages. I've been trying to do this for the past 20 minutes. I think the question is wrong, but try for yourself. Help please!
*October 6, 2012*

**History**

Thank you so much! I really needed it and my textbook didn't have it! Thank you!
*September 25, 2012*

**History**

When was Williamsburg, VA founded? And I don't mean when it became the capital of Virginia, I mean when was it created. People keep saying different things, but I'm pretty sure that it's either 1633 of 1632. Please help me! This is for a project.
*September 25, 2012*

**math**

how to count how long of $5000 at 7% interest compounded for the investment to increase to 10000? it will be awesome if you can put the way
*September 2, 2012*

**Math**

Thanks Damon!
*August 29, 2012*

**Math**

If 6 is increased by 4 times a number, the result is 68. A.Write and equation for this situation. B. Solve for the answer. I got 6+4x=68 for the equation, but I'm not sure whether or not x=15.5, or if that is what the question wants me to find. Help please!
*August 29, 2012*

**Math**

There are 300 students in the junior class at a high school. -100 students participate in theater. -70 students are involved in chorus. -140 students play a sport. -35 students are in chorus and are involved in theater, while 15 students play a sport and participate in theater...
*August 22, 2012*

**English**

Yay! Thanks so much!
*August 21, 2012*

**English**

Umm.... He told me? So it would be 'told my brother and me'?
*August 21, 2012*

**English**

Is this sentence correct? If not, could you point out what part is not correct? As an incentive to attend the local college, our father told my brother and I that we could use his company car for transport.
*August 21, 2012*

**Chemistry**

What are two reasons for precise but inaccurate measurements?
*August 20, 2012*

**english**

why did james welch write fools crow
*August 11, 2012*

**Literarture**

How do you write a repsonse to a novel?
*August 11, 2012*

**statistics**

how to get answer to geometric mean problem? data: 25.4, 9, 16, 4.25, 8.11, 19?
*July 29, 2012*

**Math**

Ramsay is standing 2906 ft away from the base of the Empire State building that is 1453 ft tall. What is the angle of elevation when she looks at the top of the building? Round to the nearest hundredth.
*July 15, 2012*

**english**

I was asking if that could be included in the analysis.
*May 17, 2012*

**english**

What does this poem mean? (tone, mood, and rhyme scheme) At the Un-National Monument Along the Canadian Border William Stafford This is the field where the battle did not happen, where the unknown soldier did not die. This is the field where grass joined hands, where no ...
*May 17, 2012*

**Physics**

Two persons A and B are walking with a speed of 4 km/h and 5 km/h respectively in the same direction. Find how far will B be from A after 3 hours ?
*May 11, 2012*

**Math**

The monthly car payments for Ted Nelson's last eight customers were $266, $285, $285, $285, $285, $315, $325, and $344. Decide whether the mode represents these data well. Explain. Please help, I think yes, because it has a mode and it makes up half of the data, but I'...
*March 5, 2012*

**math**

Why do my numbers scramble when I post math homework into my classroom forum posting box when I click on post message?
*February 29, 2012*

**English**

The question ask us to analyze this quote, "We've got all the time in the world." What does this mean? How do you explain it?
*February 28, 2012*

**math**

about $0.29
*February 28, 2012*

**Math**

Well, tell him this. A '360' is a skateboarder turning around in a circle in the air, right? tell him to imagine this skateboarder turning in a circle, but slice his movement into 4 sections, so each part of a turn looks like a quarter of a circle. Each section is one ...
*February 28, 2012*

**child care**

children should not be served drinks in containers made of a( Styrofoam c) treated ceramic B) uninsulated d) stainless steel
*February 26, 2012*

**Physic**

Two charges of equal magnitude of 2C and mass of 1.0 g are separated by a distance of 3 mm. Find the velocity of one particle when they are separated by a distance of 4mm.
*January 31, 2012*

**chemistry**

What is the concentration (m) of a solution that consists of 48 grams of copper (2) acetate dissolved in 645 mL of solution?
*December 20, 2011*

**Geometric Proofs**

how to place information to get answer of geometric mean of 25.4, 9, 16, 4.25, 8.11, 19?
*December 13, 2011*

**statistics**

Write the null and alternative hypotheses. Justify which is the claim. A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is less than 900 hours
*December 9, 2011*

**Physics**

1000 N man walks across an 8 meter plank that is suspended from two ropes(one on each side of the plank) that can only support 400N where will the man be when the plank breaks?
*November 7, 2011*

**6th grade spelling**

1. summary 9. voluntary For 3-8, think of the relationship between the first 2 words, then apply that relationship to the last 2 words. For number 3, start and begin are synonyms. Find a synonym for finish, which is conclude, and there you have it! A complete analogy! Do the ...
*November 7, 2011*

**English 10**

Ca you at least tell us what the question is asking for? What key event are they taking about? And in the story's don't really tell us what there response was after that important event, so what do we do? What i'm trying to say is can you please explain the ...
*November 3, 2011*

**Economics**

Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls faster than AVC, and ...
*October 31, 2011*

**Economics**

Consider the production function Q= 20K^(1/2)L^(1/2). The firm operates in the short run with 16 units of capital. a. The firm's short-run production function is Q=? b. The average product of labor function is AP=? c. The marginal product of labor function is MP=? d. Show ...
*October 31, 2011*

**Economics**

Total cost and total variable cost are parallel, yet average total cost and average variable cost are not parallel. a. Demonstrate mathematically that ATC and AVC are not parallel. b. Show mathematically that when both ATC and AVC are falling, ATC falls faster than AVC, and ...
*October 31, 2011*

**Statistical significance (Chi squared)Please check**

I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
*October 30, 2011*

**Please check!**

Please check this!
*October 30, 2011*

**Statistical significance test**

I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
*October 30, 2011*