Sunday

February 14, 2016
Total # Posts: 813

**Chemistry**

Identify the solvent and the solute in vinegar, a dilute aqueous solution of acetic acid.
*April 13, 2010*

**Chemistry**

Identify the solvent and the solute in vinegar, a dilute aqueous solution of acetic acid.
*April 13, 2010*

**Chemistry**

5F2(g) + 2NH3(g) ==> N2F4(g) + 6HF(g) a)If you have 66.6 g NH3, how many grams of F2 are required for complete reaction? b)How many grams of NH3 are required to produce 4.65g HF? c)How many grams of N2F4 can be produced from 225g F2?
*April 5, 2010*

**Chemistry**

The equation for the complete combustion of ethene (C2H4) is C2H4(g) + 3 O2(g) ==> 2CO2(g) + 2H2O(g) If 2.70 mol C2H4 is reacted with 6.30 mole O2, identify the limiting reagent. show all work.
*March 27, 2010*

**math**

A. Sheryl 85%*200=170 90%*180=162 B. Sherly 200-170=30 180-162=18
*March 26, 2010*

**math**

Dealer B has the lowest price $15,360. The working: Dealer A's Price: After rebate price = List Price - $1,200 = 18,000 - 1,200 = $ 16,800. 8% discount * after rebate price = 8%*$16,800 = $1,344 Net price = $16,800 - $1,344 = $15,456 Dealer B's Price: (100% List price...
*March 26, 2010*

**Chemistry**

What is the pH of a 0.200M solution for HBrO? Ka = 2.8 x 10^-9
*March 25, 2010*

**Chemistry**

How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?
*March 25, 2010*

**Chemistry**

What is the pH of a 0.200M solution for HBrO? Ka = 2.8 x 10^-9
*March 25, 2010*

**Chemistry**

How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?
*March 25, 2010*

**math percentage diff**

I could not figure this out with the regular % differece. Is this an algebric problem.
*March 24, 2010*

**math percentage diff**

Is there other methods to solve for this problem?
*March 24, 2010*

**math percentage diff**

a value of 2.40 increased to 4.48 in 5 years. what is the change in percentage each year? this one was difficult to figure out..
*March 24, 2010*

**Chemistry**

Write a balanced chemical equation for each single replacement reaction. A) Au(s) + KNO3(aq) ==> ??? B) Al(s) + H2SO4(aq) ==> ???
*March 22, 2010*

**chemistry**

The combustion reaction of acetylene gas is represented by this equation: 2C2H2(g) + 5 O2(g) ==> 4CO2(g) + 2H2O(g) How many grams of CO2 and grams of H2O are produced when 52.0g C2H2 burns in oxygen?
*March 22, 2010*

**Calculus**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 8 km and climbs at an angle of 20 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 2 minutes later?
*March 1, 2010*

**Algebra**

-9f + 7f - 17
*March 1, 2010*

**global**

Why would so many women miners prefer to work in the mines without clothing? Why did the women need the heavy belts around their waists and chains between their legs?
*February 24, 2010*

**question**

what does population density mean? i searched it up on the dictionary. com , but i still do not understand
*February 13, 2010*

**science**

how quickly -years- can new plants and animals inhabit an area that undergoes a temperature or precipitation change?
*February 9, 2010*

**adv. math**

Find the value of x so that the mean of {5x, 3/2x, x+9, -x} is -1. a. 2 b. 1/2 c. -1/2 d. -2 My answer is d. Is it correct.
*January 30, 2010*

**math**

2+m<2
*January 21, 2010*

**Spanish**

what is the preterite tense from the present of tu puedes ir = ?
*January 14, 2010*

**4th grade**

what is the trade first method,i know the counting up method but dont what they mean by the trade first method
*January 6, 2010*

**Physics**

A U-shaped tube is filled mostly with water, but some vegetable oil has been added to both sides of the U tube. On the right side of the tube, the depth of oil is 5.00 cm . On the left side of the tube, the depth of the oil is 2.30cm . The density of the water is 1x10^3 kg/m^3...
*December 3, 2009*

**Physics**

Hi im new so maybe one of you can help me understand this question, can't find it anywhere in the book. A person weighs 723N in air and has a body-fat percentage of 29.3% . What is the overall density of this person's body? What is the volume of this person's body...
*December 3, 2009*

**AP Physics**

Please anyone?
*December 3, 2009*

**AP Physics**

Hi im new so maybe one of you can help me understand this question, can't find it anywhere in the book. A person weighs 723N in air and has a body-fat percentage of 29.3% . What is the overall density of this person's body? What is the volume of this person's body...
*December 3, 2009*

**chemistry**

How many calories are required to heat 25.0 g of platinum from 24.5 °C to 75°C (specific heat of platinum = 0.139 J/gK)? 1. 47 cal 2. 42 cal 3. 48 cal 4. 20 cal 5. 80 cal Thank you.
*November 22, 2009*

**Cost Accounting**

28) LO.4 (EVA) Mountain Mist Inc.’s cost of capital is 11 percent. In 2008, one of the firm’s division generated and EVA of $1,130,000. The fair market value of the capital investment in that division was $26,500. How much after-tax income was generated by the ...
*November 15, 2009*

**algebra**

base area 56in2, height 6i find volume
*November 9, 2009*

**chemistry**

i can narrow it down to 3 and 4 because it would have to form an adduct with the SO2. but how can i solve between 3 and 4?
*November 8, 2009*

**chemistry**

Stelco has been recently legislated to reduce total SO2 emissions from iron smelting operations. Select the most effective chemical reagent to desulfurize Stelco’s gas emissions as a strategy to minimize the environmental impact of acid rain in eastern Canada: 1. NaCl 2. ...
*November 8, 2009*

**Physic**

A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s. What is the frequency of the standing wave shown in the figure? Answer in Hz. I've been working on it for a while but cant figure out...
*November 7, 2009*

**Cost Accounting**

What is the variable production cost per unit?
*November 2, 2009*

**Cost Accounting**

Please give the formula to calculate Actual mahcine hours MH budgeted Actual VOH
*October 30, 2009*

**Math**

Please help, how do I solve this: 7 gal/wk = ___ qts/hour
*October 28, 2009*

**8th grade**

WHAT IS A CHEMICAL SOLUTION AND GIVE AN EXAMPLE?
*October 26, 2009*

**Science**

WHAT IS A CHEMICAL SOLUTION AND GIVE AN EXAMPLE?
*October 26, 2009*

**Cost Accounting**

(allocating joint cost) In one joint process, Hardahl Chemical produces three joint products and one by-product. The following information is available for September 2008 Sales Value at Cost after Final SellingProduct Gallons Split-Off per gallon Split-Off Price Jp-4539 4,000...
*October 26, 2009*

**Cost accounting**

If a company has that following information available for October when per unit@4.50 per pound, labor 5.0 hours per unit@10.25 per hour, Actual: material purchased 12,300 pounds @$4.25, material used 11,750 pounds 17,300 direct labor hours@10.20 per hour, what is the labor ...
*October 25, 2009*

**Cost accounting**

Hardahl Chemical produces thc. Approximated net realizable values at split-off.ree joint products and one by-product. The following information is available for September 2008:Sales Value at Cost after Final Selling Product Gallons Split-Off per gallon Split-Off Price Jp-4539 ...
*October 21, 2009*

**Pychology **

dose any one have any ideas on how to create a demonstraion that will explain a law of sensory perception. i not only have to do a demostration i have to make an illustration of it as well. Im stuk and have no idea what to do it on.
*October 20, 2009*

**Cost accounting**

CleanSweep produces outdoor brooms. On April 30, 2008, the firm had 7,200 units in process that were 60 percent complete as to material, 40 percent complete as to direct labor, and 20 percent complete as to overhead. During May, 374,000 brooms were started. Records indicate ...
*October 14, 2009*

**math**

200
*October 13, 2009*

**critical thinking**

3 false or questionable assumptions that individuals often make (about anything) What makes these assumptions false or questionable? Which false or questionable conclusions might one very easily draw from each of these assumptions? What makes these conclusions false or ...
*October 10, 2009*

**Social Studies**

I guess Geography what are 3 levels at which a geographermight study the world? Local and Regional (my answer) BUT i need 1 more
*October 8, 2009*

**physics**

s man travel on train and throw a ball straight up relative to the train with speed of 4.90m/s the train has a velocity of 20.0m/sdue east so what is the diplacement of the ball during its rise?
*October 8, 2009*

**physics**

s man travel on train and throw a ball straight up relative to the train with speed of 4.90m/s the train has a velocity of 20.0m/sdue east so what is the ball's total time of flight?
*October 8, 2009*

**Cost accounting**

(Comprehensive) Jackson Construction Company uses a job order costing system. In May 2008, Jackson made a $1,650,000 bid to build a pedestrian overpass over the beach highway in Gulfport, Mississippi. Jackson Construction won the bid and assigned #515 to the project. Its ...
*October 7, 2009*

**Cost accounting**

Delaware Inc. uses a standard cost system. The company experienced the following results related to direct labor in December 2008: Actual hours worked 49,500 Standard hours for production 46,200 Actual direct labor rate $9.25 Standard direct labor rate $9.75 a. Calculate the ...
*October 7, 2009*

**Cost accounting**

Cost behavior and classification: Factory supervision, Aluminum tubing, Rims,Emblem, Gearbox, Straight-line depreciation on paint machine,Fenders, Inventory clerk’s salary, Inspector’s salary, Handlebars, Metal worker’s wages, Roller chain, Spokes (assuming cost...
*September 20, 2009*

**Cost accounting**

Cost terminology and cost behaviors and exercises solution
*September 18, 2009*

**Humanities**

What pitfalls or potential problems do you imagine are possible? How might we work together to avoid them?
*September 16, 2009*

**Cost accounting**

You are manager of a small restaurant in your hometown. a. whta information would you obtain for making the decision of wheter to add quiche and spicy chicken wings to your menu? b. why would each of the information items in part (a) be significant?
*September 14, 2009*

**statistics**

It is false that of Much of the emphasis in TQM is an understanding and reducing variation within the process through which the product is produced, and samples of output are used in reaching inferences about the stability of the process.
*August 25, 2009*

**statistics**

Is true that Much of the emphasis in TQM is an understanding and reducing variation within the process through which the product is produced, and samples of output are used in reaching inferences about the stability of the process?
*August 25, 2009*

**statistics**

In determining monthly seasonal indexes for gas consumption, the sum of the 12 means for gas consumption as a percentage of the moving average is 1150. To get the seasonal indexes, each of the 12 monthly means is to be multiplied by?
*August 25, 2009*

**statistics**

A multiple regression model has the form: As x2 increases by 1 unit, holding constant x1, then the value of ywill increase by: ŷ=5.25 +2.5x©û+4x ©ü?
*August 25, 2009*

**statistics**

Can you show to me sample of Sales and seven year moving average. please give the step. Thank you
*August 19, 2009*

**statistics**

If the standard error of estimate = 18 and n = 10, then the error sum of squares, SSE, is: A) 2916 B) 2592 C) 1800 D) 3240
*August 18, 2009*

**statistics**

Thank you, MathMate
*August 18, 2009*

**statistics**

A regression analysis between sales (in $1000) and advertising (in $100) resulted in the following least squares line: = 75 + 6x. This implies that if advertising is $800, then the predicted amount of sales (in dollars) is: A) $4875 B) $123,000 C) $487,500 D) $12,300
*August 18, 2009*

**statistics**

In a chi-squared test of a contingency table, the value of the test statistic was =12.678, and the critical value at = 0.025 was 14.4494. Thus, (Points: 2) A) we fail to reject the null hypothesis at = 0.025 B) we reject the null hypothesis at = 0.025 C) we don’t have ...
*August 18, 2009*

**business statistics**

Thank you, MathMate
*August 18, 2009*

**business statistics**

Hi, MathMate, thank you for your help. God bless you
*August 17, 2009*

**statistics**

In a two-way ANOVA experiment, factor A is operating on 3 levels, factor B is operating on 2 levels, and there are 2 replications per cell. If MSA/MSE = 5.35, and MSB/MSE = 5.72, and MSAB/MSE = 6.75 and using the 0.05 level of significance, what conclusions would be reached ...
*August 4, 2009*

**statistics**

In a one-way ANOVA, there are three independent samples, with n1 8, n2 = 10, and n3 = 7. The calculated F-statistic is F = 3.95. At the 0.05 level of significance, what conclusion would be reached? Based on the F distribution tables, what is the most accurate statement that ...
*August 4, 2009*

**math**

In two independent samples from populations that are normally distributed, x¯1 =35.0, s1 = 5.8, n1 =12 and x¯2 = 42.5, s2 = 9.3, n2 = 14. Using the 0.05 level of significance, test H0: µ1 = µ2 versus H1: µ1 ≠ µ2
*August 3, 2009*

**Maths**

Find the maximum value of the function f(x)=-x4-3x2+x+7 and use it to determine the range of f.
*July 28, 2009*

**How do i do this maths question??**

A sector of a circle with radius r cm contains an angle of θ radians between teh bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(7-2r)cm square. Hence, find the maximum area of this sector as r ...
*June 19, 2009*

**Pre Cal.**

1. Use half-angle identity to find the exact value of cos165. MY ANSWER: (-1/2)sqrt(2+sqrt(3)) 2. Solve 2 sin x + sqrt(3) < 0 for 0<= x<2pi. MY ANSWER: (4pi/3)< x < (5pi/3) 3.Write the equation 2x+ 3y-5=0 in normal form? (-2sqrt(13)/13)x - (3sqrt(13)/13)y + ...
*June 16, 2009*

**Pre Cal**

Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. My answer: (pi/4)+2(pi)k, (7pi/4) + 2(pi)k Solve 2cos^2 x-5cosx+2=0 for principal values of x. My answer: 60 and 300 degrees
*June 15, 2009*

**Pre Cal.**

Find the area between each curve and the x-axis for the given interval. a. y=x^4+5 from x=0 to x=5 650 b. y=3x^2+5x-1 from x=1 to x=4 97.5 c. y=4x-x^3 from x=0 to x=2 4
*June 15, 2009*

**spelling!!**

The mother is quilting a new blanket for her daughter's new baby.
*May 11, 2009*

**Tax Planning**

Lake Michigan Inc. excluded a $125,000 discharge of indebtedness from gross income. Before the exclusion, it had had an NOL of $95,000 and a general business credit carryforward of $60,000. How much of the general business credit must be reduced? A-$60,000 B-$30,000 C-$10,000 ...
*May 11, 2009*

**Tax Planning**

Grand Rapids Company paid $250,000 cash in full settlement of a $275,000 debt. Before the payment, its assets were worth $375,000, and its debt equaled $345,000. How much debt relief must the company include in gross income if it is undergoing Chapter 11 bankruptcy organization?
*May 11, 2009*

**5th grade**

atoms are held together by the attraction between what
*April 26, 2009*

**9th grade algebra**

4(4x-1)(x-2)=0
*April 9, 2009*

**science**

what are found on floridas shoreline and are spasely vegitated
*March 25, 2009*

**Science**

I'm pretty sure that its B (wont let me post link but search island arcs on google then go to the wikipedia page)
*March 23, 2009*

**Chemistry**

Rank from most to least active based on placement on periodic table : Magnesium, potassium, sodium.
*March 23, 2009*

**english**

Weave some of your quotes better. Better conclusion. thats all i have. hope i helped. (just read this book in Lit a few months ago fyi :D)
*March 23, 2009*

**physics**

What is the weight on earth of a girl with a mass of 30kg?
*March 20, 2009*

**physics**

A 100-kg crate, sliding on the floor, is brought to a stop by a 25-n force. What is the deceleration of the crate?
*March 20, 2009*

**physics**

calculate the horizontal force that must be applied to a 1-kg puck to make it accelerate on a horizontal friction-free air table with the same acceleration it would have if it were dropped and fell freely?
*March 20, 2009*

**physics**

If the planes mass with them in it was 318kg, calculate the force due to weight?
*March 20, 2009*

**physics**

What does a pilot do to the wings when he/she wants to land?
*March 20, 2009*

**chem**

Would you expect jewelry made of an alloy of silver and copper to tarnish(react) in an environment where chlorine fumes exist? Why or why not? Im assuming yes because both silver and copper metals react with chlorine gas...I don't know if I am correct in answering so.
*March 18, 2009*

**math**

can anyone explain how to solve 1/4 of 10 please
*March 17, 2009*

**spelling**

guest
*March 16, 2009*

**spelling**

guard
*March 16, 2009*

**spelling**

guess
*March 16, 2009*

**math**

A group of five friends go out to the movies. Their average age is 15. Paco is 13 yrs. old Zoey is 16 yrs. old. What is the average age of the other three friends?
*March 16, 2009*

**math**

Rachel likes running she ran over 30 miles five days this week. she ran 8 miles on Monday. How many miles did she run on average during the other four days of the week?
*March 16, 2009*

**chemistry**

1) Arrange the metal-metal ion reactions (aluminum, copper, nickel), M^n+ + ne^- --> M^0, in a column, in order of decreasing ability as oxidizing agents... What I put was : Al^+3 + 3e^- --->Al Ni^+2 + 2e^- --->Ni Cu^+2 + 2e^- --->Cu 2) Also, explain your reasoning...
*March 11, 2009*

**chemistry**

i don't know how to write balanced chemical half reactions for the oxidation of copper, aluminum, and nickel. can anyone help me?
*March 11, 2009*

**9th grade**

ok guys I want to know if I got number 6 right. 6. 3(e-4f-ef) answer: 3e-12f-3ef
*February 22, 2009*

**9th grade**

thanks guys. dunno lol
*February 22, 2009*

**9th grade**

My question is on Distributive Property, I need help on the following questions. 1. 3(u+v) 2. 4(2+5s)+3 3. 1(a+2j+12k) 4. 15(ab+3c) 5. 2(a+2b)+3(2a-b) 6. 3(e-4f-ef) Thanks
*February 22, 2009*