Tuesday
September 2, 2014

Posts by ANON


Total # Posts: 1,341

math
-5 and 5/2 are both correct answers
April 4, 2013

math
Katie, how is that relevant to the question? We're here to answer questions, not ask them.
April 3, 2013

geography
Ok thanks for the help :) the answer for the 2 was A, but I do see what you were saying about C. Since everyone is the same age that would allow more cultural similarities, but I guess us being in a jungle would be more about being stranded than actually living in a jungle. I ...
April 2, 2013

geography
Should it be B and A? I was kind of unsure of 1 because A seemed too obvious.
April 2, 2013

geography
Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive in their environment ...
April 2, 2013

Algebra 8th grade
3a + 5b = 70 6a + 9b = 135
April 1, 2013

Chemistry
Nvm it was -1.02*10^3 KJ
April 1, 2013

Chemistry
Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e- -> Ni(s) E=-0.26 Au3+(aq) + 3e- -> Au(s) E=+1.498 G= ? KJ Would it be G=1.758? •Chemistry - DrBob222, Sunday, March...
April 1, 2013

Chemistry
A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 dC.
April 1, 2013

Chemistry
It is still wrong.
March 31, 2013

Chemistry
I got -1.02*10^6 but it is wrong.
March 31, 2013

Chemistry
Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e¨C ¡ú Ni(s) E=¨C0.26 Au3+(aq) + 3e¨C ¡ú Au(s) E=+1.498 G= ? KJ Would it be G=1.758?
March 31, 2013

Chemistry
So would it be X^2+ and Y^2+?
March 31, 2013

Chemistry
X^2+ + 2e- -> X(s) E=1.73V Y^2+ + 2e- -> Y(s) E=0.40v Which pair of species would react under standard conditions? X^2+ and Y^2+ X and Y^2+ X and Y X^2+ and Y Would it be X and Y because the E is positive?
March 31, 2013

Chemistry
Calculate the cell potential for the following reaction as written at 59 ¡ãC, given that [Cr2+] = 0.763 M and [Sn2+] = 0.0170 M. Standard reduction potentials: Sn2+(aq) + 2e¨C ¡ú Sn(s) E=¨C0.14 Cr2+(aq) + 2e¨C ¡ú Cr(s) E=¨...
March 29, 2013

Chemistry
Which of the following reagents would oxidize Cr to Cr2 , but not Fe to Fe3 ? Ca Co Ca2+ Br2 Co2+ Br- Which of the following reagents would oxidize Cu to Cu2 , but not Cl– to Cl2? Br2 Ca Co2+ Co Br- Ca2+
March 29, 2013

Chemistry
A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?
March 29, 2013

Chemistry
A current of 4.60 A is passed through a Pb(NO3)2 solution for 1.20 hours. How much lead is plated out of the solution?
March 29, 2013

algebra 10th grade
Checking algebra answers, Is it correct 320km/1hr ↓ 320km /1hr →1m/1.609km =320m/1.609hr÷=199.3mph Answer: Round to nearest 10th =198.9mph
March 28, 2013

Physics
A 85-kg snow skier is being pulled up a 17 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.4 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.6 x 10-4 m. A frictional ...
March 27, 2013

Pre calculus
How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: -8=-3-6 (3sqrtx^2) Thanks again!
March 27, 2013

maths
This is a question from Brilliant dot org.
March 26, 2013

Science
Are compounds chemical or physical changes of matter?
March 22, 2013

Science 8th grade
what gets hot and cold faster, solid or gas and why?
March 22, 2013

Quantum Physics
Please help for Q9!
March 20, 2013

Biology
To take the energy from an exergonic reaction and use it to power an endergonic reaction, a cell can: create the energy for the endergonic reaction to occur. Why is this false? I thought a exergonic reaction create energy for the endergonic reaction to occur?
March 18, 2013

Chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by selective ...
March 17, 2013

Chemsitry
The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?
March 17, 2013

Chemistry
At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.49. What is the Ksp of the salt at 22 °C? Is the ksp=1.38*10^-11?
March 17, 2013

Chemistry
My calculator only show up to the 1.0*10^-9 not 1.46*10^-9. Thanks
March 17, 2013

Chemistry
The answer is wrong. ksp is not 1.00*10^-9
March 17, 2013

Chemistry
Is the answer 1.50*10^-14?
March 17, 2013

Chemistry
What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.20 × 10-3 M Ag ? The Ksp of Ag2SO3=1.50×10^–14 Is the concentration of SO32- = 4.69*10^-12?
March 17, 2013

Chemistry
At 25 °C only 0.0610 mol of the generic salt AB2 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C? AB2(s) <- -> A^2+(aq)+2B^-(aq) Is the answer ksp=9.08*10^-4?
March 17, 2013

Chemistry
At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.49. What is the Ksp of the salt at 22 °C?
March 16, 2013

Chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by selective precipitation?
March 16, 2013

Chemistry
The Ksp of magnesium hydroxide, Mg(OH)2, is 5.61 × 10^-12. Calculate the molar solubility of this compound. Is the answer 1.1*10^-4 M?
March 16, 2013

English
It is wrong. COMPOSED
March 15, 2013

English
By the time he was twelve years old, Mozart had compose an entire opera. Is this correct?
March 15, 2013

Chemistry
Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul
March 14, 2013

Chemistry
A solution is 5.0× 10–5 M in each of these ions: Ag , SO42–, Cl–, CO32– Which precipitate will form? Ag2SO4 (Ksp = 1.12× 10–5) AgCl (Ksp = 1.77× 10–10) Ag2CO3 (Ksp = 8.46× 10–12)
March 14, 2013

Chemistry
What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.20 × 10-3 M Ag ? The Ksp of Ag2SO3=1.50×10^–14 The ksp expression is 1.50×10^-14=(Ag^+2)^2(SO3^-2)/(Ag2SO3). Is the concentration 3.0×10^-9?
March 14, 2013

Chemistry
H3BO3 -> H+ + H2BO3- Why doesn't H3BO3 break down to something with H3O+ because it is a weak acid? I know many weak acids break down to something with H3O+ like HCN, C6H5COOH, HNO2, and HF.
March 12, 2013

math
Tara filled 1/6 of her garden with tomato plants. Dan filled 1/6 of his garden with cucumber plants. How much did they fill in total?
March 12, 2013

SCIENCE
Above can hardly talk about cheating, in order for you to have found this page you had to search the question, thus you were trying to cheat also. Before you start pointing fingers, make sure your hands are clean.
March 12, 2013

English
A worker can hear neighbors tapping on computer keyboards, making telephone calls, and muttering under their breath. Is this right or wrong?
March 11, 2013

Algebra
Thank you to the both of you. I understand now I was getting mixed up. :)
March 5, 2013

Algebra
Can you please solve this I don't understand I know the answer is b>3 but If you can break it down for me and show work? (: 3b+12>27-2b
March 5, 2013

Science
How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?
March 4, 2013

Math 7th grade
Katya bought 2 gallons of juice. she drank 2 quarts. how much was left?
March 3, 2013

Algebra/Math
Can you show work por favor? :) A metalworker has a metal alloy that is 20% copper and another alloy that is 60% copper. How many kilograms of each alloy should be combined to create 80 kg of a 53% copper alloy?
February 27, 2013

Spanish
What's the date of your birthday? B. It's the first of Dec. How old is your mom? A. She's 36.
February 27, 2013

Chemistry
calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius
February 26, 2013

Chemistry
you have 20% sucrose solution. you need to mke 100ml of 15% sucrose solution. which is the correct dilution? A. 85ml of 20% sucrose and 15ml of h2o B. 25ml of 20% sucrose and 75ml of h2o C. 75ml of 20% sucrose and 25ml of h2o D. 15ml of 20% sucrose and 85ml of h2o
February 25, 2013

Chemistry
It said it is still wrong. It said Which of the two strong bases will produce more OH ions per formula unit?
February 20, 2013

NEED HELP ASAP
So it would be KOH>Ca(OH)2>NH3>HBrO>HBr?
February 20, 2013

NEED HELP ASAP
The answer you put is wrong.
February 20, 2013

Chemistry
Rank these to highest pH to lowest pH: NH3, KOH, Ca(OH)2, HBr, HBrO I put these in the same order for highest pH to lowest but still get it wrong.
February 20, 2013

chemisty
The density is the mass/volume. You will have to calculate the volume of the block. The volume of a block is the height x width x length. However, before multiplying, be sure to convert the dimensions so they are the same units. For example, convert them to cm.
February 20, 2013

CALCULUS
The derivative of e^x is e^x. To determine the derivative apply the constant multiple rule
February 20, 2013

Earth Science
Which geologic principle states that if rock strata are found folded or faulted, the folding or faulting occurred after they were deposited? faunal succession uniformitarianism original horizontality cross-cutting relationships Uniformitarianism does not sound right at all for...
February 20, 2013

Algebra
-2x-y=-1 how do you put this in slope-intercept form y=mx=b ?
February 19, 2013

Math
A bag contains 10 yellow, 15 blue and 5 red Marbles. Mark chooses a candy and doesn't replace it in the bag. Find P (neither blue)
February 14, 2013

Math
A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?
February 12, 2013

Physics
A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?
February 12, 2013

math
In the U.S., 4634 million pounds of apples were consumed in 2002. The population of the U.S. in that year was 290 million. 1. a medium apple weighs about 5 ounces. estimate how many apples a family of four would have consumed in one month.
February 9, 2013

Chemistry
Kc=0.0406
February 5, 2013

NEED HELP!
So part a would be at equilibrium and part b would be goes to the left?
February 5, 2013

Chemistry
In which direction will the net reaction proceed X(g)+Y(g)<---->Z(g) Kp=1.00 at 300k for each of these sets of initial conditions? a) [X]=[Y]=[Z]=1.0 m net reaction goes to the left net reaction goes to the right reaction is at equilibrium I chose 3 for a. b) Px=Pz=1.0 ...
February 5, 2013

Chemistry
Some people should not be allowed to help others with chemistry...solids do not have concentrations...therefore doubling the volume would have no effect
February 5, 2013

Chemistry
Kc = 1.2^2/3.8=0.379 The container volume is doubled A(s)<------>B(g)+C(g) (3.8/2)-----x----x--- 0.379 = (x^2)/(1.9 - x) x^2 + 0.379x - 0.7201 = 0 x=0.679 M A = 1.9 - 0.679 = 1.22 M But I got it wrong.
February 5, 2013

NEED HELP!
•NEED HELP ASAP - Anon, Tuesday, February 5, 2013 at 11:14pm How do I find x and the moles? •NEED HELP! - Anon, Tuesday, February 5, 2013 at 11:25pm Is x=0.189? I used the quadratic equation to solve for x from Kc = 0.514 = (0.6+x)(0.6+x)/(1.4-x). How do you find the...
February 5, 2013

Chemistry
4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) <-------> B(g)+C(g) Then, the container volume was doubled and ...
February 5, 2013

Chemistry
2.422 mols is wrong.
February 5, 2013

NEED HELP ASAP!
Kc = 1.2^2/3.8=0.379 The container volume is doubled A(s)<------>B(g)+C(g) (3.8/2)-----x----x--- 0.379 = (x^2)/(1.9 - x) x^2 + 0.379x - 0.7201 = 0 x=0.679 M A = 1.9 - 0.679 = 1.22 M But I got it wrong.
February 5, 2013

NEED HELP
I got it wrong. X doesn't equal .189. I really need help on solving this problem.
February 5, 2013

NEED HELP!
Is x=0.189? I used the quadratic equation to solve for x from Kc = 0.514 = (0.6+x)(0.6+x)/(1.4-x). How do you find the moles of A?
February 5, 2013

NEED HELP ASAP
How do I find x and the moles?
February 5, 2013

Chemistry Help
For the first Kc I got .514 For the second Kc I got .129. How do I find the mols afterwards?
February 5, 2013

Chemistry
4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) <-------> B(g)+C(g) Then, the container volume was doubled and ...
February 5, 2013

Chemistry HELP
It is wrong. It said Incorrect. You need to compare Qc to Kc, not Kp.
February 5, 2013

Grammar (Last one :) )
Thank you :)
February 5, 2013

Grammar (Last one :) )
Except for Ronnie and _____, everyone was on time. him(my answer) he Between you and _____, I know the answer to the mystery. I me(my answer) Leave your message with Ms. Horioka and _____. me(my answer) I It was Geraldine Ferraro _______ ran for vice president in 1984. who(my ...
February 5, 2013

English-Grammar
Thanks :)
February 5, 2013

English-Grammar
So the third one is "predicate nominative"?
February 5, 2013

English-Grammar
Decide if the underlined (in parentheses) pronoun in the sentences below is used as a subject, a predicate nominative, or an appositive. Both Ben and (he) will graduate at the same time. (my answer)subject predicate nominative appositive The driver of that station was (she). ...
February 5, 2013

English-Grammar
Thank you :)
February 5, 2013

English-Grammar
Identify how the underlined pronoun in each sentence is being used. 18. Someone sent Ed and (me) a text from an unknown phone. direct object (my answer)indirect object 19. Mr. Simons saw Owen and (us) at the registry. (my answer)direct object indirect object 20. Show Edie and...
February 5, 2013

Geography
What is absolute location? A.a precise measure of where a location falls in terms of longitude and latitude using units such as minutes and seconds B.a precise measure of distance around the equator C.a more precise measure of where a location falls in terms of longitude and ...
February 4, 2013

physics
ive been sick so i missed a few classes and im not sure whats going on in my class these are my homework problems im trying to keep up
February 4, 2013

physics
In a water pistol, a piston drives water through a larger tube of radius 1.00 cm into a smaller tube of radius 1.00 mm. (a) If the pistol is fired horizontally at a height of 1.5m, use ballistics (2-D projectile motion) to determine the time it takes water to travel from the ...
February 4, 2013

physics
The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to manufacture the coin...
February 4, 2013

English
Thanks :)
February 1, 2013

English
Which word correctly completes the sentence? To (blank) did you write the card? A. Who B. Whom I thnk the answer is B. Whom. Which meaning of the vocabulary word steep is used in the sentence below? The steep rise in gas prices angered the population. A. Vertical B. Sudden C. ...
February 1, 2013

physics
A light bulb is placed 17.1 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 6.60 cm closer to the mirror. Calculate the focal length of the concave mirror.
January 31, 2013

Chemistry
At –11.0 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to 1.50 kg of pure water and still have the solution freeze? Assume that aspartame is a molecular solid and does not ionize when it dissolves in ...
January 29, 2013

NEED HELP!
Can someone help me?
January 29, 2013

Chemistry
Classify these mixtures as colloids, suspensions, or true solutions. fog, milk of magnesia, mayonnaise, blood, table salt in water, dust-free air I got fog, milk of magnesia, mayonnaise for colloids. Blood for suspensions. Table salt in water and dust-free air for true ...
January 29, 2013

Chemistry
Is the freezing point 372 degree C? Kb = 0.512 Kf = 1.86
January 29, 2013

Chemistry
The boiling point of an aqueous solution is 102.48 °C. What is the freezing point? I know that formula for freezing point is delta Tf = Kf*m but what do I plug in for each?
January 29, 2013

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