Friday

November 21, 2014

November 21, 2014

Total # Posts: 313

**Science**

Write the half reactions and the balanced equation for the galvanic cell Hg(ℓ)| Hg2(+2)(aq)|| MnO(−4)(aq), Mn2 (aq), H(+)(aq)| Pt(s). What is the smallest possible integer coefﬁcient of Mn(2+)(aq) in the combined balanced equation?
*November 15, 2014*

**chemestry**

what is the electron configuration of lithium after making an octet
*September 29, 2014*

**Math **

200 oranges were purchased for $53.40. How much would 100 oranges have cost?
*September 21, 2014*

**Force of Gravity**

How far from Earth's surface would you have to travel to be 1/4 your weight. Give your answer in Earth radii. I know you have to travel twice the distance or 1 Earth radii... I just don't know how to mathematically show it. Please help.
*September 11, 2014*

**Math**

.037x.15 0.00555
*August 27, 2014*

**Math**

28.00
*August 27, 2014*

**Math**

0.028
*August 27, 2014*

**Math**

estimate 6.9 x 3.67 2.800
*August 27, 2014*

**math**

2.800 ?
*August 27, 2014*

**math**

estimate 6.9 x3.67 25.323
*August 27, 2014*

**Math**

You have 17fourths of pizza. Show with math or pictures how many pizza you have. 4 pizzas with 1 slice left. 4
*August 27, 2014*

**chemistry**

35.6 g of Zn reacts with 87.1 g of Br to produce ZnBr2, the only product, with no reactant left over. How much ZnBr2 could be formed by reacting 156 g of Br? 1. 538 g 2. 45.4 g 3. 382 g 4. 220 g 5. 0.0156 g 6. 0.00262 g
*August 27, 2014*

**ALgebra**

A theatre production company donated free tickets for their show to the local Boys & Girls club. They claimed that the ticket value was $306. A child's ticket cost $5.25 and an adult ticket cost $9.75. If there were three times as many children's tickets as adult ...
*June 12, 2014*

**chemistry**

Is it possible to identify a metal in a fragment if you only know the specific heat?
*May 18, 2014*

**HELP! 5th grade math**

Liquid A-2L Liquid B-2L Liquid C-2265mL Liquid D-2265mL
*April 13, 2014*

**chemistry**

Sorry there is, 4.) Calculate the amount of het absorbed or lost by the calorimeter. The calorimeter's initial temperature is the same as the solution that is initially inside it. 5.) Determine the amount of heat absorbed or lost during this reaction. 6.)Which of the ...
*April 13, 2014*

**chemistry**

If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the balanced equation for this reaction? 2.) what is the ...
*April 13, 2014*

**math**

Since the car rents for $22.50 per day and you are charged $.15 per mile, how many miles could you drive and not spend over $50.00
*April 9, 2014*

**English 10**

synthesize
*April 8, 2014*

**math**

find the value for (m) that makes each number sentence true a. 2/3 x 4/5 x m =1/3 b. 4/5 x 2/3 x m =1/3 c.2/3 x 4/5 = 1/3 / m
*February 6, 2014*

**math**

Kalin walks at a steady rate of 3 2/3miles per hour. The beach is 4 1/4 miles from his home. How long will it take Kalin to walk from his home to the beach and back to his home?
*February 6, 2014*

**Physics**

A swimmer wants to cross a river, from point A to point B, as shown in the figure. The distance d1 (from A to C) is 200 m, the distance d2 (from C to B) is 132 m, and the speed of the current in the river is 1.0 m/s. Suppose that the swimmer's velocity relative to the ...
*February 1, 2014*

**to ALison (planets)**

Oh I know right I always feel like they will give me inaccurate answers @country_cutie XD
*December 17, 2013*

**to ALison (planets)**

Thank you but I really want to stay on the safe side and just listen to my school so I will get a good grade. I appreciate your websites though. Thank you 😁
*December 17, 2013*

**to ALison (planets)**

I know right!!! @country_cutie XD
*December 17, 2013*

**to ALison (planets)**

And just wondering why did you capitalize AL in my name? Was it just a typo?
*December 17, 2013*

**to ALison (planets)**

:-/
*December 17, 2013*

**to ALison (planets)**

Please reply as soon as you read this. Thank you
*December 17, 2013*

**to ALison (planets)**

Sorry Steve and I'm sorry ms.sue. I was just valedictorian for 6th grade and 7th grade and I go to the best middle school in Jacksonville, Julia Landon. I think I was just very stressed out since I really tried my best to find the answer to the question. I also haven't...
*December 17, 2013*

**Precalc**

solve the equation: log base 10 of x - log base 10 of (7-4x)=2 Please help i have been stuck on this for awhile!
*November 26, 2013*

**Math**

I really need help with this question so can anyone please explain to me how I can solve this question and please explain to me how you found the answer to this question step by step.
*November 3, 2013*

**Math **

Which is an equation of the line that passed through ( 2,-5 ) and ( 6,3 ). A. Y= 1/2X - 6 B. Y= 1/2X C. Y= 2X + 12 D. Y= 2X - 9
*November 3, 2013*

**Physics**

two identical brass balls mounted on wooden posts initially have different amounts of charge, one plus 3 uC and the other plus 15 uC. The balls are allowed to touch and then separate again. What is the final charge on each ball?
*October 26, 2013*

**PHYSICS!!**

I've tried this problem again and again using conservation of momentum and energy but I am not having any luck: A ball of mass 0.300kg that is moving with a speed of 8.0m/s collides head-on and elastically with another ball initially at rest. Immediately after the ...
*October 11, 2013*

**Chemistry**

(0.3 mol/1L)*(1L/1000mL)*(40.0mL) = 0.012mol K2O
*October 10, 2013*

**physics**

After 10.3 s, a jogger’s displacement is 360 m. What is the average velocity in m/s? Answer in units of m/s part 2 What is the average velocity in km/h? Answer in units of km/h
*October 1, 2013*

**Physics**

If Joe rides south on his bicycle in a straight line for 29 min with an average speed of 14.8 km/h, how far has he ridden? Answer in units of km
*October 1, 2013*

**Physics**

How much time would Simpson save by in- creasing his average velocity to 65.8 km/h to the east? Answer in units of min
*October 1, 2013*

**physics**

Simpson drives his car with an average veloc- ity of 49.7 km/h to the east. How long will it take him to drive 150 km on a straight highway? Answer in units of h
*October 1, 2013*

**Physics**

A car makes a 288 km trip at an average speed of 31.3 km/h. A second car starting 1 h later arrives at their mutual destination at the same time. What was the average speed of the second car for the period that it was in motion? Answer in units of km/h
*October 1, 2013*

**Physics**

A 2000kg car rounds a curve of 65m banked at an angle of 11∘ How much friction force will be required? I know how to find frictional force on a normal flat surface but I don't know how to apply it with a curve. Any help with work would be great!
*September 27, 2013*

**prealg8.. ASAP PLEASE**

You do the top minus the bottom, so 6-9 is -3 so the answer is y^-3
*September 27, 2013*

**Math**

The square root would be two of the same numbers multiplied to give the answer 64 so 8*8=64 The cubed root would be three of the same numbers multiplied to give you the answer of 64 so 4*4*4=64
*September 27, 2013*

**Calculus**

Consider the indefinite integral (6x^3+3x^2-19x-10)/(x^2-4)dx Then the integrand decomposes in the form ax + b + (c/(x-2)) + (d/(x+2) I found b and c to equal 3 and d to equal 2, but I'm having trouble finding A and finding the final integration by integrating term by term.
*September 27, 2013*

**Physics **

A car rounds a curve with a radius of 25 m at a speed 30 m/s. What is the centripetal acceleration of the car?
*September 22, 2013*

**Math**

Steve is right. That is the only answer it gives you. So yeah. lol :)
*September 9, 2013*

**physics**

A stone is dropped from the roof of a building; 1.60s after that, a second stone is thrown straight down with an initial speed of 26.0m/s , and the two stones land at the same time. part a. How long did it take the first stone to reach the ground? part b.How high is the ...
*September 6, 2013*

**Physics**

A herd of wildebeests led by Roger is charging down the hall on the way to lunch. They start out at 10 m/s and accelerate at a constant rate for 5.35 s to reach 34 m/s by the time they reach the stairs. How quickly did Roger's velocity change?
*June 17, 2013*

**Physics**

During a head on car crash, the car is designed to slow down as its front end crumples. If a person can survive an acceleration of -33 m/s how far must the front end crumple if the car was initially traveling at 28 m/s?
*June 17, 2013*

**Calculus**

Given that f(x)=x^8h(x): h(−1)=5 hŒ(−1)=8 Calculate fŒ(−1)?
*June 12, 2013*

**HISTORY**

Um... hello there. It depends what era you are speaking of. If referring to the first colonial expansion the whole could be summed up in "God, Glory, and Gold". Europeans have an evangelical religion, meaning it actively searches out converts. Calvinism is one such ...
*May 19, 2013*

**physics**

Sara walks at 1.50 m/s. She notices Emily is standing at the coffee shop ahead so she accelerates at 1.55 m/s ^2. How far is emily ?
*March 4, 2013*

**Chemistry**

An electrolytic tin-coating process gives the coating 30 millionths of an inch thick. How many square meters can be coated with one kilogram, density 7.30 g/cm^3?
*February 28, 2013*

**math**

That is the correct answer. How did you come up with it? lol :)
*February 22, 2013*

**math**

A model of a boat is 1 3/8 feet long. How long is the model of a ship that is 3 times as long, I'd the models are made to the same scale?
*February 11, 2013*

**Math**

Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of &...
*December 23, 2012*

**Math**

A friend claims that the average length of trout caught in this lake is 19 inches. To test this claim we find that a sample of 13 trout has a mean length of 18.1 inches with a sample standard deviation of 3.3 inches. The population standard deviation is unknown. If you assume ...
*December 22, 2012*

**Math**

Let x be a random variable representing the monthly cost of joining a gym. We may assume that x has a normal distribution and that the population standard deviation is $5.20. A fitness magazine advertises that the mean monthly cost of joining a gym is $35. You work for a ...
*December 22, 2012*

**Statistics**

An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school ...
*December 17, 2012*

**math**

Well, I can't be sure I'm right, but here's how I look at it. Red Blue White Green Yellow Each of the above is a color to choose from. There is one that doesn't contain what you need, but you still have to take it into account so let's put that in first. ...
*November 30, 2012*

**science**

composite.
*November 29, 2012*

**Microsoft word,excel**

The insert chart feature does not allow you to do what to a chart?
*November 26, 2012*

**Last science question**

its b
*November 15, 2012*

**Calc**

It is noon. A secret agent is driving a jeep through the desert in the tiny principality of Alta Loma. He is 32km from the nearest point on a straight, paved road. Down the road 16km is a power plant in which a band of international terrorists has placed a time bomb set to ...
*October 20, 2012*

**Biology..eh:/**

If trypsin and chymotrypsin become activated within the pancreas and then are released in their active forms into the bloodstream, why would this represent a potentially life-threatening situation?
*July 31, 2012*

**chemistry please help me please!!!**

.002301 moles because .0195 L x .118 .002301/.017 =molarity(concentration) Answer 0.135mol/L concentration
*July 9, 2012*

**Physio help please**

Nevermind
*July 9, 2012*

**Physio help please**

why might an endurance athlete wish to increase his or hematocrit?
*July 9, 2012*

**Physiology-help please:(**

A child is brought to the speech therapist because she does not pronounce high-pitched sounds (like "s"). Name the sensory organ that is most likely the problem and what area of the organ is being affected? She also experiences extreme dizziness and loss of balance ...
*July 9, 2012*

**calc**

The wheels are connected BT a belt. One wheel has a radius of 10inches and is rotating 40rpm. If the other wheel has a radius of 6inches, what is its angular velocity? Is 200rev/3min correct?
*April 28, 2012*

**calc**

1)Convert 1/20 of a circle to both degrees and radians. All I have is 9/180 is what I come up with. 2) what fraction of a circle does 3pi/4 represent? Is 1/4 correct? 3) a ferries wheel has cars which move at 1.5mph. If the diameter of the wheel is 600 ft, how long will it ...
*April 28, 2012*

**Finance**

Brand Advertising is offered a 3/10 net 40 trade discount by its supplier. In the past Brand has been able to ger away with paying for supplies on credit in 60 days. Since it doesn't have money on hand to take advantage of the discount, it tries to negotiate a loan with ...
*April 14, 2012*

**Chemistry**

A rxn has delta H ^0 rxn=-112kj and delta S^0 rxn =354 J/K. at what temp is the change in entropy for the rxn equal to the change in entropy for the surroundings?
*April 12, 2012*

**Chemistry**

I don't know what they form... D) ZnCl2+ NH3---> E) Cu3(PO4)2 +2NH4OH---> A) NH3+ ZnSO4--> I don't understand what it means by excess... How do I figure out what they form.
*April 8, 2012*

**Chemistry**

Write balanced net ionic equAtions. D) zinc chloride and excess ammonia E) cupric phosphate and lots of ammonia A) ammonia and excess zinc sulfate
*April 8, 2012*

**CHEM**

a 250.0ml buffer solution is 0.250M in ascetic acid and 0.250M in sodium acetate. B). What is pH after addition of 0.0050mol of HCl? C). What is pH after addition of 0.0050mol of NaOH?
*March 28, 2012*

**Chem**

Find pH. A) 0.10M Zn(OH)4^-2 F) Zn(OH)2 in 0.010M ZnCl2 Q) 0.010 M Zn(NH3)4^+2 hint: fined [NH3] then kb for OH^- Im having trouble with these can someone help me.
*March 25, 2012*

**Chemistry!!!**

Consider a solution that is 0.022 M in Fe2+ and 0.014 M in Mg+2. A). If potassium carbonate is used to selectively precipitate one of the cations while leaving the other on solution, which cation will precipitate first? What minimum concentration of K2CO3 will trigger the ...
*March 21, 2012*

**Chem!!!:/**

Determine whether of not each compound will be more soluble in acidic soln than in pure water. Explain. A). Hg2Br2 B). Mg(OH)2 C). CaCO3 D). AgI I think acid, neutral,acid,neutral ??? Help please!:) thAnks
*March 19, 2012*

**precalc!!!!!**

I have to prove this: (a^3-b^3)= (a-b)(a^2+ab+b^2) How do I use long division to get (a^2+ab+b^2). I'm given..... 1). (a^3-b^3)/ (a-b) I cant get that answer. Help?
*March 19, 2012*

**precalc!!!!!**

Use long division : (a^3-b^3)/ (a-b)
*March 18, 2012*

**Chemistry**

Set Kc = (x)(0.2-x)/(0.2-x) . Solve for x. 0.2-x is H2S equilibrium concentration
*March 18, 2012*

**help chem!:/**

a) Calc. PH of 0.010 M HF and 0.030 M KF e) calc. PH Zn(OH)2 in wAter
*March 15, 2012*

**Chemistry**

1.CALCULATE pH of 1.0 L 0.010 M ascetic acid and 0.50 L 0.010 M NaOH. 2. Calculate pH of 1.0 L 0.010 M NaOH and 0.500 L 0.010M HCl Buffer help?
*March 15, 2012*

**ChemB**

CALCULATE PH OF THE SOLUTION THAT RESULTS FROM EACH SOLUTION A) 150.0mL OF 0.25M HF WITH 225.0 mL OF 0.30M NaF Help please, these buffer questions are confusing.
*March 12, 2012*

**ChemB**

A forming acid solution has a pH of 3.25. Which of these substances will raise the pH of the solution upon addition? Explain. A) HCl B) NaBr C) NaCHO2 D) KCl
*March 12, 2012*

**CHEMISTRY!!!=0**

OH, okay so when I produce a strong acid and a strong base it is neutral so pH=7. Meaning the 0.20M KI doesn't even matter?
*March 1, 2012*

**CHEMISTRY!!!=0**

Determine pH of each solution: 0.20 M KI i don't know how you know if you use.. K+H2O->KOH + H or... I- +H2O--> HIO +H Im thinking this one... I- + H2O --> HIO + H 0.20M--------------------0-----------0 0.20-x------------------x-------------x there is a Ka value ...
*March 1, 2012*

**CHEMISTRY!!!=0**

Determine pH of each solution: b) 0.20 M CH3NH3I I did.... CH3NH3^+ +H2O -> CH3NH2 + H3O^+ 0.20 ---------------0--------------0 0.20-x--------------x------------x so i got... ? =x^2/0.20-x i looked up in the back of the book and found the Kb of CH3NH2 to be 4.4 X 10^-4. do ...
*March 1, 2012*

**AP CHEMISTRY**

He got 62.5ml by making up a certain amount of volume for the 0.1M solution and setting it equal to the 0.08 NaOH( which is used to titrate the solution) and determined the amount of NaOH in milliliters needed until the solution hit its endpoint basically he used... M1 x V1 = ...
*March 1, 2012*

**CHEMISTRY!!!=0**

Determine the pH of each solution: (a) 0.10 M NH4Cl can someone show me how to do this one so i have the idea of how to do the rest. thanks!
*March 1, 2012*

**Chemistry**

Determine the Concentration of OH^-1 and pH of a solution that is 0.140 M F^-1. I did F- +H20 ---> HF + H20 but idk what to solve from there....
*February 28, 2012*

**Psychology**

my answers match up with your answers!!! :)
*February 20, 2012*

**Chidren,Families,and Society**

he has probably had a very violent family life, even though he is young, he might have picked up on family fights or feuds that have gotten ugly. he may be abused or he may have pre-k students bullying him. he could possibly have an anger management disorder.
*February 20, 2012*

**law**

Im not sure about elementary. child abuse maybe. In middle schools around here there are alot of drug sells and alcohol too. also a few bullying situations that lead to suicide, not sure how tht helps. High school: drug abuse, alcohol abuse, underage drinking, domestic ...
*February 20, 2012*

**eng 22**

i would definitely go with paying attention to what the film has to say. Just my opinion though
*February 19, 2012*

**algebra**

no, she does not have enough. the shoes are $88 with the discount. so she needs $8. To figure this out, divide $132 by 3. multiply that by two and then you have the cost of the shoes.
*February 19, 2012*

**law**

i do not think tht she should be able to obtain money from this. as the article says, she mislead investigators which is a serious federal offense. she is lucky tht is the only consequences she got. she should be in jail or paying a fine.
*February 19, 2012*

**Last Chemistry Question!**

Yeah i got tht. I hope to make a difference in life some day like you are. Just not a teacher lol. i cnt handle bad kids. haha well ima let you get back to helping. Bye
*February 19, 2012*

**Last Chemistry Question!**

oh thts awesome! Thank you so much for all the help tonight. You Rock Dr Bob!!! :)
*February 19, 2012*