# Chemistry (again)

63,266 results

### chemistry

Dr Bob, Thanks for your help. Ihad googled for 3 hours before asking you. For future reference, if anyone asks this question again, 10th grade chemistry, I found a video on You Tube that makes it easy to understand. It is, The Sci Guys, Ph indicator, acid-base indicator. ...

### geometry again again again again

If angle AFB= 8x-6 and angle BFC= 14x +8, find the value of x so that angle AFC is a right angle.

### English

Hello. Please help me with a few questions. 1) Which is the correct position of "again" in the sentence: "They have (again)gathered (again)at the square (again)"? 2)Does the phrase "the allegations doubt his integrity" have the same meaning as "the allegations question his ...

### Summer School Calculus

Another one for you :P, add these two vectors using trigonometry (again)... 9N[S2W] and 11N[N31W]...Again, I am confused about the angles, I am not sure what value I should use for the cosine and sine law. THANKS AGAIN!!

### English

1. Can we meet again one day? 2. Can we meet again oneday? 3. Can we meet again some day? 4. Can we meet again someday? (Which ones are grammatical? Which one is commonly used? Thank you. Have a good day!)

### geometry again again again

Two angles are supplementary. one angle measures 12 degrees more than the other. Find the measures of the angles.

### Math

How do I solve this equivalent equation? 5x +2 < 17 (again the <is underlined) Do I subtract 2 from each side so it would read 5x < 15 (again the < is underlined) than divide each side by 5 so the x < 3 (again the <is underlined) is the answer? Also, how do I...

### Chemistry

What will be the pH of an aqueous solution containing 0.040 mol/L sodium hydroxide?? I got 1.40 or 1.398 I rounded the numbers is my answer right??? If not what's the right answer?? I know I wrote the question again, because on the previous answer I did not understand what u ...

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would you agree? ...

### Chemistry

Use oxidation numbers to identify reaction is REDOX reactions. a. 2SO2(g) + O2(g) -> 2SO2(g) for 2SO2 I got: -2 for S, -2 for O for O2 I got 0 for 2SO2 I got -2 for S again, and -2 again for 0 Therefore I lost one oxygen and a REDOX reaction occured Am I right?????

### English

They are arguing about rules and regulations again. I have to identify the adverb. again

### calculus hs

Here's the question again How do I find all line through (6, -1) for which the product of x- & y- intercepts is 3? Thanks again

### Calculus

So, yet again, I am confused! State whether or not the following statements are true. Justify your reasoning. a). a• ( b+c ) = a• b + a • c b.) a × ( b+c ) = a × b + a × c c.) a × ( b•c ) = a × b • a × c Thanks, again!

### French for Anonymous to Sra

its me again could u please tell me how to say by: to: due: I need it for my title page thanks again:)

### science

Me again :) Why might a car manufacturer change the shape of the side mirrors on a particular model? Thanks again.

### vocab, again! sorry!

Hi, again. I need help with this word decorum. the def is ADJ proper; seemly correct how do i use this in a sentence?

### Chemistry

Our professor just told us that the final exam will be the ACS exam, we are taking general Chemistry II. What is the best way to study for ir? Is the preparing for ACS general chemistry study guide good? If we are taking general Chemistry II do we have to study Chemistry I again?

### Chemistry

Our professor just told us that the final exam will be the ACS exam, we are taking general Chemistry II. What is the best way to study for ir? Is the preparing for ACS general chemistry study guide good? If we are taking general Chemistry II do we have to study Chemistry I again?

### chemistry

How do you calculate molar mass again?

### Chemistry

The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode. Hi, I posted this question awhile back but I think it got drowned out so I...

### chemistry

What is the percent ionization of a 1.38 mol/L weak acid if its Ka = 2.7 x 10^-6? Thanks again!

### chemistry: again

What is the predominant type of intermolecular force in I2 (iodine)?

### Spelling

Substitute a word beginning with re- for each of the underlined phrases. 1) The patient was(admitted again) after.. 2)I would like you to(copy this assignment)in.... 3) When the CD player broke I asked for my money (back again)

### Health (again)

Hi! It's me again! Here is the question: How many teenagers smoke in ontario? (as recent year as you can find) 20.7 teenagers Thank you Sam!! :)

### chemistry again

how do you find the concentration of an ion remaining after a reaction is complete???

### band

please help me solve this riddle. "you've heard me before, yet you hear me again. Then I die, Til' you call me again." Who wrote this riddle?

### algebra 2..again

2y^3-10y^2+12y...need to factor again..i got to the second step... 2y(y^2-5y+6)...think that's right but i don't get how to factor that out..help plz..

### Math

Solve the system by graphing by any method of your choice. 3x-y=1 or y=3x-1 3x-y=2 y=3x-2 (0,-1),(2, 5)and(0,-2),(-2,4) Solution is Consistent, lines intersect at (-1/4, -5/4). Above is my answer but I keep coming back to this again and again. Am I missing something? I solved ...

### Algebra 1 Please bobpursley again

Thanks to everyone for trying to help me. This is not really a question but an answer to what grade level this promblem is for my son is in ninth grade. Thank You all again

### english

hi again why is mentally retarded person not like a normal person is what i meant thanks again

### chemistry

After your explanation I try to solve it, so would you please check my work again. Thank you! a)

### Chemistry

Please briefly explain why is bond energy defined only for gases? Thanks for your help again.

### chemistry

Hello this is ellie again. I was wondering could you explain what a bombardment reaction is and and show an example of it? Thanks

### chemistry

Hey DrBoB222 I was wondering if you could help me with that problem just a little bit ago again?

### sociology

My assignment is about reading "Sociology as an individual pastime"( Peter L. Berger) and summarizing it. I have read it again and again for many times, but I still don't understand it clearly. Please help me

### English

Identify the correct sentence. A. Neither Bill nor Linda ever wish to see that snarling cat again. B. Bill and Linda hope never to see that snarling cat again. C. Bill and Linda wishes they would never see that snarling cat again. D. Bill and Linda hopes never to see that ...

### English

1. Wilma was able to walk again at age twelve. 2. Wilma was able to walk again at the age of twelve. 3. Wilma was able to walk again at twelve. 4. Wilma was able to walk again aged twelve. (Which ones are correct? Could we use other expressions?)

### DrBobb222!! Help!!

Please look at my Chemistry problems again, I reposted them with the constants and such. I am still confused!

### Math

I snap my fingers once. I wait one second and snap them again. I wait two seconds and snap them a third time. I wait four seconds and snap them again. I wait 8 seconds and snap them again. If this pattern continues, how many times will I snap my fingers in a year? Thanks!

### Chemistry (again)

What mass of NaOH is required to precipitate all the Fe2+ ions from 52.0 mL of 0.200 M Fe(NO3)2 solution?

### English

1. The Glass Menagerie once again taps into the audience's emotions, as it has for 70 years. 2. "Her son is about to fly away, never to seen or heard from again and she knows it," Jones said. (Are they all grammatical? Would you check the errors in them?)

### Algebra 2

Two days ago "Steve" helped me with this problem. I am grateful to him. I didn't get it and asked for him to help me again. He showed it to me again, but I needed more steps shown. Then I think he was finished for tutoring for the day before I could see it again with more ...

### Chemistry- Dr. Bob again

Another Redox in BASIC ....having a tough time with these OH's no clue how to tackle. Cr(OH)3 + ClO^- => CrO4^2- +Cl2 thanks for your help

### english

Which sentence would to grammatically correct? 1) Remember never to do that ever again. 2) Remember to never do that ever again. 3) Remember to never to do that ever again.

### Math

Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was -1435.650.... And I typed in -1436. and said I was wrong and so I tried it again and typed 1.4 x 10^3, wrong again. ...

### English

1. There you go, you put the bad-mouth on others. 2. There you go again, you put the bad-mouth on others. 3. There you go. You're always forgetting things. 4. There you go again. You're always forgetting things. ------------------------------------ Do we have to use 'again' or...

### math again

please help me and thank you. the product of two whole numbers is 48 and their sum is less than or equal to 20.what are all the possiblities for the two whole number? again thank you for helping me :]

### Biology....someone who can explain something to me

can someone explain the Miller-Urey Experiment to me? I've read it again and again and I just don't really get it. Please help me out here.

### French

If I want to say: "...but now all is well again" do I use "encore" or "de nouveau" for "again"? Mais maintenant tout est bien encore(de nouveau) Merci beaucoup!!

### Chemistry again

PbO2(s) + Pb(s) + H2SO4(aq)  PbSO4(s) + H2O(l) Can anyone help me identify what the redox reactions are for this equation? I don't understand how to do it when there are more than 2 chemicals.

### chemistry

why we just see a light spot of benzaldehyde after tlc in iodine chamber which soon vanishes and does not appear again?

### Pre-Algebra ... again :-(

How do i go about finding the integers of a product and quotient ... like, product of -20 whose quotient is -5 ..... thanks again

### chemistry

Please help again. How many grams of lithium are required to completely react with 70.7 mL of N2 gas at STP when given the following reaction: 6Li + N2 = 2Li3N

### English

11. From which of the following lines can readers infer that Marge Piercy, the poet who wrote "To Be of Use," views hard work as an activity that is worthwhile? A. "the black sleek heads if seals" B. "bouncing like half-submerged balls" C. "who do what has to be done, again ...

### Math

I am very sorry but I was wrong with the problem. The math problem is: 9 / (3.6-2.1) Thank you Anonymus for your answer but I want the problem that I wrote above. If you help me again pleaseeeeeeeee. I don't know how to resolve this. Thanks again.

### Chemistry

This is the last one Dr Bob! How much concentrated 18 M sulfuric acid is need to prepare 250 ml of a 6.0 M solution? Im stumped again, could you point me in the right direction ? Thank you sir!

### chemistry

If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9 of the radioactive material has decayed so that you can safely wear the shoes again?

### English

1. Identify the choice that best describes the sentence: The dog always barks with pleasure when she sees us. A. declarative****** B. exclamatory C. imperative D. interrogative 2. Identify the correctly punctuated sentence. A.I'd love to see that movie again [maybe next Friday...

### precal

The smaller of 2 numbers is 10 less than 4 times the greater number. The bigger number is 19 more than the smaller one. If x is the smaller number one equation is: a)x+y=19 b)x=19-y c)y=x+19 d)x=y+19 I'm almost positive it is d I just want to check. A second equation is: a)x=...

### science again again

so if i were saying i was something somethings tall.....wich would be better....meters...centimeters...or millimerter... I really doesn't matter, but say if it were a building, then meters. Distance to the tip of Africa from where you are, then kilometers. For the length of a ...

### FRENCH

In French, what does agreement mean again? Cause for example I put down this: Ils ont marches sur l'Avenue Champs-Elysees. But there shouldnt be an S after marche because theres no agreement with avoir. Could I please know what agreement means again?

### chemistry

A 0.446g sample of an unknown monoproctic acid was titrated with 0.105 M KOH The molar mass is 120g/mol. What is the PKA value? Pls helps me again

### Maths

Points A,B,C are given on circle Γ such that AB=BC. The tangents at A and at B intersect again at point D. The line CD intersects Γ again at E. The line AE intersects BD at F. If AD=120, what is the length of FB.

### English

1. Eleven Cities Tour finally takes place again! 2. Eleven Cities Tour finally is held again! 3. Eleven Cities Tour is finally held again! ---------------- Between #2 and #3, which one is grammatical?

### Thx again for another year of success

Hey ms. sue, i am now in 9th grade thx to you i just wanted to say thx again for helping me last year!!! and this year a couple of times :) :DDDD

25-x^2 6x^2 ------ * ------ 12 2x *I got: 5-x/2 No. Try again. Can you tell me what I did wrong please.? You have to factor the numerator, you should have two factors for the first, and one for the second. In the denominator, you will have 24 x. I think the x divides out, and ...

### physics

i do not get this question at all and if u could help it'd be a real HUGE help. solve these equations (sorry i do not have the symbols so i will just write the words out. sorry again for any inconveniance. ): time= 2pi x squareroot of length/gravity ....i know it my seem very ...

Ben is helping plant tulips. He plants bulbs in two rows and has one bulb left over. So he tries again. He plants bulbs in three rows and has one bulb left over. So he tries again. He plants bulbs in four rows and has one bulb left over. So he tries again. He plants bulbs in ...

### MsSue- re

im sorry my post appeared twice it didn't show my question when i looked then when i posted it again it was there. Im sorry my computer is a bit slow. thankyou for your help now you have explained the question ive got an idea what i need to do. Thankyou again!

### chemistry

Good day to everyone My class has just started a "Chemistry systems in Equilibrium" unit and I have a question I would like answered if possible, I would truly appreciate this. My Question: How will the following system change when F2(g) is added to a sealed vessel containing ...

### math

Suppose you toss a coin and it you win a dollar if it comes up heads. If it comes up tails you toss the coin again. This time you get two dollars if it is heads. If it is tails you toss it again. This time you win four dollars if it is heads, but if it is tails you toss it ...

### English

1. If I miss so much school again, how can I become a teacher? 2. If I miss so many schools again, how can I become a teacher? -------------------------- Which one is correct? Is #2 grammatical?

### Chem drawing

how would I draw this compound? 2-bromo-6-chloro-4,4-dimethylheptane I've tried it again and again but I can't seem to get the Cl on the 6th carbon while still having a 6 carbon chain of heptane I drew it so that it was CH3 CBr CH2 CCH3CH3 CH2 Cl I just can't figure it out.....

### Chemistry

One more, confused How can you tell by the periodic chart which ions of metals are most easily reduced or oxidized. A website or video would be fine. I know it is quite involved. thanks again

### Chemistry

Confused again ok I have to find the number of atoms in carbon with a mass of 13.5. So this is what I didi. 13.5 / 12.01* 6.022 *10^23= 6.77x10^23 but the correct answer is 6.74x10^23 what have I done wrong

### Health

Hi again..sorry I havn't been asking questions these days as my sister (y912f) is always on :P I wanted to know whether it is better to brush your teeth after eating or before. Because mostly everyone does it before but I don't see the point when they're going to get dirty ...

### Physcis

You are traeling back and forth on a 10m straight lane. You go forth in 10 sec and back in 4 seconds,forwards again in 5 s and back again in 1 seconds. what is ur displacement. and what is your average speed

### Math

A man comes up to play a game. you flip a coin, if heads you win \$1 and keep playing if heads again you get \$2, if you get heads again, \$4 and so on. If you flip tails you take your money and the game is over. How much should he be willing to pay?

### Calculus

Hi it's me again I need help with this too and I promise to never use this site again! I feel so ashamed for asking :( Use the Fundamental Theorem to evaluate the integral from 0 to 3 of the quantity x cubed minus 6 times x, dx.The answer has to have the antiderivative too. ...

### chemistry again

calculate the normality of a solution prpared by dissolving 220.0 mg of K2Cr2O7 in 100 ml solution that will be used to oxidize ferrous chloride according to the unbalanced reaction.

### chemistry

Hello ellie again. I am still having trouble understanding bombardment. The question I'm working on says Complete the bombardment reaction ? + 40-18Ar → 43-19K + 1-1H

### Guru Blue superstar

Hey Guru, Once again you shine that light. Thank you so so much for the links. Anybody else reading this should know I wish I had had Guru Blue as my teacher when I was a kid. A practical, patient and ever helpfull human being. Thank you again.

### General Studies

Someone on here gave me some sites that helped to unscramble words. I don't recall what the site was and I am in need help again. Could someone please give me some unscramble sites again? Thanks, Kimberly

### Chemistry

Can you please help me to work out the addreviated structural formulae of hydrolysis of tocainide? Won't it be the -NH2 group that hydrolyzes? ArNH2 + HOH ==> ArNH3^+ + OH^- Check my thinking. Thanks That is exactly what I thought it would be. Thanks again DrBob.

### Physics

An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...

### Physics

An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...

### chemistry

Effusion/Diffusion Chemistry Help!!! If 4.83mL of an unknown gas effuses through a hole in a plate in the same time it takes 9.23mL of Argon, Ar, to effuse through the same hole under the same conditions, what is the molecular mass of the unknown gas? (146amu) Responses: * ...

### Science

I asked about this earlier and got an answer that caused me to rethink my process. Is this a good way to measure iron corrosion: weigh a nail, put it in water and let it rust, remove the rust (in my experiment the rust has come off easily, with just a wipe), and weigh it again...

### art - again!

im sorry to be a pain and ask for help again ive nearly finished my art homework but i aim struggling to write a story about the Michaelangelo,creation of Adam painting any ideas what i can write or a start off question. sorry to be a pain. thankyou so much

### re -same question again

sorry to post this question again but i am having trouble finding evidence of what jesus did not do . i don`t really understand the question like i mentioned in my last post does it mean that he did not get married or have children . i can`t find anything i can print off. i ...

### chemistry again

If you are given V1=410 ml T1= 27 C= 300 K P1= 740 mm Find V2 in ml at STP When given STP= 273K and 1 atm

### Chemistry

Is odor a physical property? I would think it would be, but then again odor is caused by chemicals.

### Math again

Thanks Ms Sue .. another question built on the last ... i figured 143 miles per year .. then next question, .4 miles per day ... now i have to figure out how many feet per day .. how do i calculate this? thank you again ...

### Geometry

A pair of complimentary angles have measure x* (star equals degree) and x*(again star equals degree) + 8*. What is the measure of the smaller angle? the problems looks like x* and x*+8* AGAIN THE stars stand for degree. I think the answer is 6, but not sure how.

### chemistry,again

3 Fe2O3 + 1 CO → 2 Fe3O4 + 1 CO2 how many grams of Fe2O3 are needed to prepare 255 g of Fe3O4? a. 118 g b. 552 g c. 264 g d. 383 g

### English--Priss

Is it alright to ask a question again and again until you get the answer you want? Goodness, you have been responded to, and several of us read that and did not have diverging views from what Writeacher stated. If you did the research, did the analysis, then "I" is most ...

### Poetry

what is the rhyme scheme for the poem: Come, the wind may never again Blow as now it blows for us; And the stars may never again shine as now they shine; Long before October returns, Seas of blood will have parted us; And you must crush the love in your heart, and I the love ...

### calculus

Me again. One last question! Again, just needed my answer verified with any explanation or walk-through. The position of a particle moving along a coordinate line is s=√(3+6t) with s in meters and t in seconds. find the particle's acceleration at t=1 second. a. 1 m/sec^2...

### Physics

Two trucks, 300 km apart, are on a head-on collision course with one another. The first truck is moving at 100 m/s and the other is moving at 50 m/s in the opposite direction. A confused (but swift) fly starts from the front bumper of the faster truck and flies at 200 m/s ...

### Chemistry HELP AGAIN!

What is the total molar concetration of all the ions in 0.015 M solutions of the following salts in water? .015 M KCl .015 M CuSO4 .015 M CaCl2