Chopsticks

This page lists questions and answers that were posted by visitors named Chopsticks.

Questions

The following questions were asked by visitors named Chopsticks.

A silicon chip is used in an integrated circuit of a microcomputer has a mass of 5.68 mg. How many Si Atoms are present in this chip. Okay here is how I worked it. Can someone please tell me if its right? 1 mole of Si = 28.086g = 6.022 x 10^23 5.68mg of S...

Chromium is ametal that is added to steel to improve its resitance to corrosion. Calculate both the number of miles in a sample of Cr containing 5.00 x 10^20 atms and the mass of the sample. Ok this is how I worked it. 1 mole of Cr = 51.996g = 6.022 x 10^...

Using aervage atmoic masses for each of the following elements, calculate the mass, in amu (grams) A. 635 atoms of hydrogen ---> 1 mole of H = 1.01g = 6.022 x 10^23 atom 635 atom of H 1.01g/6.022 x 10^23 atom I got 1.06 x 10^-21 amu. I got that answer buy...

Can someone tell me how to factor 2a^2 - 16ab + 32b I just need someone to help me get started, and I want to see if I can finish it.

Can someone tell me how to factor 2a^2b - 16ab + 32b Should I factor 2b out of it?

Ok heres another factoring that I need someone to check Problem: -x^3 + 27 -(x^3 - 3^3) So I moved the positive and found out what cubed would make 27 Using the forumla: (a-b)(a^2+ab+b^2) -(x-3) (x^2 + 3x + 9) Right? Or did I make a mistake?

I know how to solve if the leading coefficient is 1, but how would i solve it if its not 1. Ex. f(x) = 2x^3 + 7x^2 - 7x + 30 Can someone help me start that out? Then I'll use synthetic divison to solve for it.

Calculate the percentage of water in each of the following hydrates. Aluminum bromide hexahydrate I just need help setting this up. I can work it from there Would it be: AlBr * 6H2O Did I write it right?

Hey Can you take a look at my previous post that you replied on.

Aluminum bromide hexahydrate How would you know its AlBr3 * 6H2O instead of just AlBr * 6H2O?

What is the empirical forumla (lowest whole ratio) of the compounds below? A. 13.0g Mg 1 mole/24.312 = .53 mole 87.0g Br 1 mole/79.909g = 1.09 mole Mg .53/.53 Br 1.09/.53 Mg 1.0 Br 2.1 What do i do now?

Can someone reply to my previous post.

This is kind of tricky for me. What os the empirical formula (lowest whole number ratio) of the compounds below? A. 25.3% Cu, 12.9% S, 25.7% O, 36.1% water How would i set this up? The water at the end is confusing me. I think I need to find the percentag...

Determine the simplest formula for compounds that have the following analyses. The data may not be exact. A. 28.5% iron, 48.6% O, 22.9% S This is what I did: 28.5g Fe 1 mole Fe/55.847g = .51 mole 48.6g O 1 mole O/15.999g = 3.04 mole 22.9g S 1 mole S/32.06...

can someone reply to my previous chemistry thread please?

I am not a music person and I rarely lisen to music. My teacher made us do an essay to modern music that has the theme of freedom or going to a better place. Does anyone know a song that has both freedom and going to a better place? or asking for help? ca...

Sometimes, instead of percentages compostion, you will have the composition of a sample by mass. Using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. A. a .858g sample of an unkown substance...

Use the experimental molar mass to determine the molecular formula for compounds having the following analyses. A. 41.39% carbon, 3.47% hydrogen, 55.14% Oxygen; experimental molar mass 116.07 I got C4H4O4 as the molecular formula. Can someone check this f...

can some one reply to my last chemistry post? thanks.

1. (3ã6 * 4ã6)^12 Answer :6^7 2. 3ã9 * 3ã6 / 6ã2 * 6ã4 Answer: 3 Can you guys show me how to work those? I got the answers from back of the book, but I have no idea how to work it. The number behind the square root sign is the nth.

2/the 6th root of 81 the answer gave an answer of "2 3rd root of 3/3" sorry i didn't type the root signs, i dunno how. can you show me how to work this?

Can someone teach me how to locate direct objects and indirect objects in a sentence?

Convert to Mass Convert to Mass: .000523 moles of C6H12O6 if figure that out, would i have to add up the molar mass of C x 6, H x 12 and O x 6 ? then us the total mass of that over moles to find out?

I was doing a lab today in chemistry, and I do not know if I got my measurements correctly. My teacher gave us a strip (probably 5inches) of Mg. We measured it, and then after that, we had to burn it, and measure the mass of it after it was burn. Would th...

Can someone please reply to my previous post about chemistry preferable DrBob since he was helping me on it, but anyone is fine.

When burning a Magnesium Ribbon, would the color (the white dust) that it changed to be a chemical change? Or how about the spark it makes (I am just in basic chemistry, so that spark might be counted as a chemical change)? So far I got from the help for...

Drbob, your explanation is very clear and I learned alot out of it. I also have one last question to ask you. I posted it at my last post.

Do we have any accounting tutors here?

Anzlyzing financial statement effects of accounting for bad debits using the allownace method. Duffy Bros. uses the allowance method to account for bad debets expense. Duffy experienced the following four events in 2008: 1.Recognition of 64,000 of service...

X^1/3 - 2/5 = 0 x^1/3 = 2/3 x= 2/3^(1/3) x=1.38 is that right? Also (x-4)^3/2 = -6 How do you do that?

Can u answer my last alg post?

Solid phosphorus trichloride is produced by reacting solid phosphorus and chlorine gas. 2P + 3Cl2 -----> 2PCl3 is that right?

Aqueous magnesium hydroxide has been used for many uears because it reacts with HCL to produce magnesium chloride So far I got Mg(pos. 2 charge)OH2(-1 charge) + HCL >>>>>>> Mg(+2 charge)Cl2(-1 charge) + H2O did i get that rite?

can someone reply to my last post?

WAter amd nitrous oside are produced by heating ammonium nitrate NH4NO3 >>>> NO + H2O is that right?

Hydrogen sulfide burns in the presense of oxygen producing sulfiar dioxide and water I got HS + O2 >>> SO2 + H2O Its not balanced yet, but can you check if i wrote the equation right? Does the hydrogen sulfide need charges added to them?

can someone reply to my last chem post

Can someone tell me when I add charges to my balancing equations? I know that you add charges when dealing ionic compounds (metal and nonmental), but what else? Acid?

Nitric Acid + Calcium hydroxide ---> calcium nitrate + water I wrote it as : NO3 + Ca(OH)2 ---> Ca(NO3)2 + H20 Did I write it correctly? Where should I put my charges? I also have big time trouble balancing this one.

Can you reply to my last post? thank you.

Balance the following equations if the reactions will occur. gold + oxygen Au + O2 --> ??????? barium + oxygen Ba + O2 --> ??? bismuth + oxygen --> Bi + O2 --> ??? help please. keep in mind this is single replacement

Rationalize the demoninator of each expression. (9y/x)^4 i have no idea how to do that

The U.S is the only country currently not using the metric system as its primary system of measurement. Imagine uou have been appointed to the Board in the US Trade and Commerce department that is trying to rewrite the metric conversion act of 1975 in ord...

is iron (III) carbonate a solid or (aq)?

(2x/2x) + 1 == 1?

Can someone help me find GOOD pratice tests for Prepositional phrases, Participial phrases, gerunds phrases, infinitive, appositive, adjective phrase, adverb phrases, main clause, subordinate clause, complex clause and compound complex clause Thanks!

We are on combustion reaction at the moment in chemistry, and I have to say, these reactions are like extremely hard to balance(well, just alot of erasing). It takes me a while to balance combustion reactions and I want to know if theres any tips in balan...

Has anyone read Song of Myself by Walt Whitman?? I can't find any themes for it. So hard to understand. Would slavery be a theme? I need atleast 4 themes associated with Song of Myself.

I have a question on Ghandi. Okay, my brother's 3rd grade teacher assigned him to do some kind of project on Ghandi for Black History month... Is Ghandi even black?

I was wondering if you had any experiences with the english part of the ACT test. About 3 hours ago, I took a pratice test on the english part of it, and got like 20/35. That's like 57% right. I want to know how to tackle those sections where they have a...

I already know the 3 methods of doing it, but I recently found out about using matrices to solve it. How exactly do you do that? All I can remember is something with rref on my calculator.

AHH! I just remember about my french test tomorrow on qui and que. How do you know when to use which? HELP!

Can you reply to my french post. I think your able to help me with it.

Simplify the expression: The first 7 is regular size and the log7x are small (the second 7 is subscripted only). 7log7x = would the answer be 1? How do you work this?

Can you reply to my last math+log post =) thanks. I'm going to be having alot of math questions today.

how would i graph log3x the 3 is subscripted? I remember that I had to make an X and Y chart and list the Domain and Range

If I did research paper on the Great Depression, would that topic be too board?

2C2H2 + 5O2 --> 4CO2 + 2H20 How many grams of CO2 is produced when 2.50 x 10^4gC2H2 burns completely 2.50 x 10^4gC2H2 * 44.009gCO2/26.038gC2H2 = 4.23x10^4gCO2? or am i wrong

Okay, I'm going to register for the ACT, on their website it says Registration Deadline: February 27, 2009 Does that mean starting tomorrow, I'll be late? Or tommorrow will be the last day to register?

I was thinking about math courses for next year, and I do not know what I'm going to take. What is the differences between Alg 3 and Advanced math? And also, and does Trig involve? And I'm too scared of calculus to take it.

1. Suppose you invest $1,000 in a CD that is compounded continuosly at the rate of 5% annually. What is the value of this investment after one year? two years? five years? A=1000(e^(.5x1)) = 1648.72 A=1000(e^(.5x2)) = 2718.28 A=1000(e^(.5x5)) = 12182.49 2...

Hey Reiny, could you please take a look at my expo growth and decay post? Thanks alot.

Can you check back at my last post again? Thanks.

How do you solve 6log2x = 13 I got log2x^5 = 13 but I don't know what to do next. Would it be 2x^5 = 13^2 HELP. Thanks.

What is the limiting reactant when 19.9g of CuO are exposed to 2.02g of H2 according to the following equation? CuO + H2 ---> Cu + H20 My attempt at this: 19.9gCuO * 1moleCuO/79.539gCuO * 1moleCu/1moleCuO = .250moleCu 2.02gH2 * 1moleH2/2.016gH2 * 1moleCu/...

Can you reply to my last post on chemistry? thanks alot.

For each product of the following unbalanced equations which reactant is limiting, and calculate the mass of each product that is expected. 1) 2Al + 6HCL --> 2AlCl2 + 3H2 15.0gAl * 1moleAl/26.981gAl * 2moleAlCl3/2moleAl * 133.34gAlCl3/1moleAlCl3= 74.1gAlC...

3e^2x = G -3e^2x = G -3e^-2x = D 1/8e^2x = G -1/8e^-2x = D Would that be correct? I just made these examples up in my head. How can you tell if its growth or decay? I just look at the exponents. If is a negative then its decay? if its positive then its gr...

Expand Log5(5squareroot x/7) the first 5 is a base how would you expand that?

I'm doing a report on the great depression and I need some reliable source about politcal issues or anything politcal that occurred during the great depression. My teacher made us use note cards to write these information down. Any help would be greatly a...

Can someone find me sources for Involvement Cause of the great depression. I found some but they are not enough.

How sharp is stainless steel? Can someone give me a comparsion to how sharp stain steel is? are they as sharped as kitchen knives? or how about samurai swords?

Can someone verify my answers please? convert the folowing into a pressure reading expressed in torr A. 1.25atm * 760torr/1.0atm = 950. torr B. 2.48 x 10^-3 atm * 760torr/1.0atm = 1.88 torr C. 4.75 x 10^4 atm* 760torr/1.0atm = 3.61 x 10^7 torr D. 7.60 x 1...

A sample of Oxygen has occupies 1.00x10^6mL at 575mm Hg is subjected to a pressure of 1.25atm. What will the final volume of the sample be if the temperature is held constant v2=(p1)(p2)/p2 I'll have to convert 1.25atm to mm first 1.25atm*760mm/1.0atm = 9...

At standard temperature, a gas has a volume of 275mL. The temperature is then increased to 130. Celcius, and the pressure is held constant. What is the new volume? How do I work this? v1 = 275mL t1 = 130. C or 403K v2=??? t2 = ??? Can someone help me plea...

Okay, basically what we did in the lab was fill up an empty soda can with about 5mL of water, and we had to heat it up to a boiling point. After that we turned the soda can upside down into a beaker with cold water. After a minute or so, the can just snap...

Do you see any similarities between FDR and Obama as leaders? What about similarities between the economic challenges faced then and now? Compare and contrast the two presidents and their responses to economic issues during their administrations. Well, I...

I was just wondering if it was a good idea to convert this part of the website into a homework forum? It would be alot more organized that way because everything would be under sections and stuff. People can also distinquish between tutors and students as...

Okay, I recently made a post about converting the homework help section into a homework help forum. I have heard that many tutors have suggested this but there were some problems that occurred. What do you guys think? I want to here opinions from all the...

Three of the primary components of air are carbon dioxide, nitrogen, and oxygen. In a sample containing a mixutre of only these gases at exactly one atmosphere pressure, the partial pressure of carbon dixoide and nitrogen are given as Pco2 = 0.285torr and...

We have never learned the formula (P1V1/T1) = (P2V2/T2) Is that the same thing as P1V1T2=P2V2T1 ??

What is the purpose of the login function on this website? You can always change your name to whatever you want, so why even have it there?

Is sleeping a waste of time? Now that I think about it, sleeping seems like a waste of time.

Can you please verify the anwer I gave robb under his chemistry post called "mass-mass". I probably did something wrong.

Are you going to be on for a lil bit more? Around 1-2 hours now from this post? I really need help with some french, but I have to do some other homework first. I'll check on your reply in a bit. Merci beacoupe.

How do you say You must put on your seatbelt? ans: Vous faut mettre sur votre ceinture de securite You must use your signal to turn ans: vous faut utiliser votre clignotant avant de tourner You must not use your phone while driving ans: Vous ne faut pas u...

Is it true that in France, people get paid to make the language sound more pretty. My teacher told me that people get paid over there to make up words that sound pretty and enforce it.

Say that an airplane is traveling at 800mph. A woman walks from the back of that plane to the front at 3mph. How fast is that woman actually walking? Is she still walking 3mph? or 800+3= 803mph? I keep wanting to say its 3mph

Can a virus attach to your cells and steal nutrients from it? Answer: Yes. Can a virus attach to your cell and burst it by filling it up with water? Answer: No Correct?

A virus spreads in a small town. What should first do to find a vaccine for the virus? I narrow it down to "Idenify the Virs" and "Idenify the host of the virus" I say identify the host of the virus first.

India : Duck Australia : Duck South Africa : Duck, Goose Africa : Duck Cat Antarctica: Duck Goose If scientist wanted to argue that South Africa, Africa, and Antarctica was once connected, which animals would they use to determine that? Would it be just G...

Compare the rationing in WWII to how we have been affected by the wars in Afghanistan and Iraq. How would Americans today react to a government rationing program? Choose 3 of the items you read about that were rationed during WWII and explain whether or n...

Hello, I took my ACT test today, and I think I epicly failed the english part. The part where you had to correct the underlined sentence was really hard. I would narrow it down to 2 answers, but obviously only one can work. Both of them looked correct to...

Does anyone here speed read? I can do a little bit, but I can comprehend what I read too well when I try to speed read. All I can do is read the words then forget everything. Any tips? Or is that the negative thing about speed reading?

What did Robert Frost write about in his poetry? I think he wrote about the common people of America.

Okay, I got accepeted for a part time job at school, and the letter says that I should bring a resume. I never had a job before, so how would I bring a resume, but it seems really bad for me not to bring something.

I have no idea what to put under my experience section of my resume? Should I just exclude it from the resume? I have no working experience :P

Answers

The following answers were posted by visitors named Chopsticks.

:) thanks so converting milligrams to gram was a good idea

So, it would still be correct if i chose mg for the unit of the molar mass? that way i don't have to convert?

So mass would be .0432? the reason why i got the problem completely wrong was because i got the mass wrong?

80300000 ? i think that's the right answer

I remember my teacher telling me that covalent bonds are stable

I have no idea, how I'll give it a shot. Maybe you should move the (P2)(V2) to the other side. So (P1)(V1)(P2)(V2)/T1 = T2 That is just a guess. I hope that helps you somehow

Ah I also have another question. I forgot to ask my teacher this, but when I used the "^" on this problem I got the right answer. Computer the number of atoms of Al of a 10.0g sample ---> moles of Al = 26.981g = 6.022 x 10^23 I ended up with 2.23 x 10^23...

For example Wouldn't 8E4 = 8 x 10^4?

No, I think I'll just stick with the "E" for these kind of problems.

I think that the longer the bond length the weaker the covalent bond.

6.1 x 10^3 Start from the last zero and move it to the left until it reaches between 6 and 1.

is that just regular multiplying?

Well if you plug that in to your calculator, you should get -22.727 What i did was 10 x (-25/11) = -22.727

Positive x negative = negative. Make sure your answer is negative

Are you factoring?

If you factor x^2-1 = you get (x-1)(x+1) You can check your answer using FOIL

Ohh I'm sorry, The problem was 2a^2b -16ab+32b So should it be So should I factor with 2b?

is it suppose to be an inequality?

well they all share 2 like you said so 2(a^2b - 8ab + 16b) that makes it the perfect square trinomial But I have no idea how to factor that. If that b was gone from the a^2b, than I can do it, but with the b there, i have no clue.

Who wait, but i thought you cant factor using b because ab is a term by itself

Well if your talking about the 2a^2b its 2a^2 * b the exponent is only with the a. So does that mean 2b can factor?

So I factored it right? Ha thanks alot.

You can draw arcs on that angle. Say you see 2 angle that is congruent to each other, you can draw a arc on each of those angles. And say you see another angle that's congruent to another angle and buts its not congruent to the first one, you can use 2 ar...

Is it respiration?

The energy held in the covalent bonds between atoms in a molecule is called chemical energy

January Named after the Roman god of beginnings and endings Janus (the month Januarius). February The name comes either from the old-Italian god Februus or else from februa, signifying the festivals of purification celebrated in Rome during this month. Ma...

Equation has an = sign and expression doesnt?

If someone looks at this, please reply. I will for replies around 6:30am before school starts.

Well, when the pilgrams first came to America, they came with nothing. They had no way of getting food, most of the people were sick, and they did not know their way around. The Wampanoag taught them how to get food, showed them around the land, they also...

frowns live cry sleep eat breath

Al = 26.981 3Br = 239.727 12H = 12.096 6O = 95.994 Total = 374.798 Total H2O = 108.090 108.090/374.798 x 100% = 28.840% Correct? are my sig figs messed up in anyway?

Ahh Okay. So its one of those things i have to memorize?

Ahh, now i remember my teacher telling me about it.

if u have the calculator isnt the inverse buttom -1

Well if she regrouped then to 29tens and 44ones that = 334 334 does not = 304

My teacher told me what I needed to get both numbers to whole numbers by mutiplying 2-6. But i do not know when to do it. Can you please give me an example

AHH! I get it now! Thanks a ton!

I'm still confused. Okay I solved everything but H20 25.3g Cu 1 mole/63.54 = .40 12.9g S 1 mole/32.064 = .40 25.7g O 1 mole/15.999 = 1.61 But what do i do with the H20? Can you work this part for me? I want to see how you did it

My teacher always told us to round to the hundreths place. How did you get 18.015 ??

aah wait i see how now.

For these problem, just FOIL backwards. 1. y^2 +6y +9 (y + 3)(y + 3) << you can check your answering by foiling it. 2. 25x^2 - 10x + 1 (5x - 1)(5x - 1) 3. -y^2 + 36 -(y + 6)(y - 6) im not sure about the 3rd 1.

I don't get it either. But overall, did i get my calculation right? or did i do the process right?

Dang, I do not think its possible to draw it on this website and post it for you to view. Maybe you should try searching it on the internet (google).

yea they are completely made up.

Umm, If I can remember correctly, there is only 3 terms, so you don't have to factor by grouping. I'm not sure if this is right or not but I'll try it. I got 2t^2-23t-45 then I use FOIL (2t - 5 )(t - 9 ) < answer

oh wait nvm i did math wrong i think the answer is (2t + 5(t - 9)

(2t + 5)(t - 9)

Hey, but how far should I round the percentage to?

hmm.. i think it will be 5x

not all linear equations are function. uhmm if you can use the horizontal line test to check if its a function or not.

huh? so did i get my molecular forumla right? sorry im a bit confused on what you said.

. (3ã6 * 4ã6)^12 Answer :6^7 2. 3ã9 * 3ã6 / 6ã2 * 6ã4 Answer: 3 Can you guys show me how to work those? I got the answers from back of the book, but I have no idea how to work it. The number behind the square root sign is the nth.

I have no idea why the Square root sign wont show when I do it.

the book gave me that answer.

ã49 = 7 ã4 = 2 So 7/2

You can easily figure this out if you have a calculator. Both those numbers are perfect squares.

2,4,6,8,10 I just counted by 2s.

I don't know if this is right or not but, you can multiply the sqr roots together to get ã64 = 8 1/16 is the answer I got

Hmm, I see an ad for a tastey burger at Mcdonalds, and I want it!

yea i think that's a metaphor

ah i thought wrong. Thanks Ms. Sue for pointing that out

aahh i see thanks alot

Monera Protista Fungi Plantae Animalia

aah i see. thanks alot.

Yeah, We got a white powder. So I guess our new substance would be MgO. I think it should weigh more. Am I right? but it shouldn't weigh much more right? probably around .05g more? Does that sound about right?

Also, she asked me to write any chemical changes that occurred. If I mention the color changes, the texture, and the mass, would that be consider chemical changes?

What would be consider a chemical change besides MgO?

I'm thinking maybe the sparked it made would be a chemical change when it was being burned. Is that another a example of a chemical change? I need one more chemical change. So far I got: 1. Changed from Mg to MgO 2. Made spark when burning 3.

Also, is the white powder a chemical change? since color changing is a chemical change.

Thanks alot! Your examples helpes me.

x = 1-4y 2x+7y=3 Starting with the first equation since x = 1 - 4y Plug that in to the second equation 2(1-4y)+7y=3 2 -8y + 7y = 3 2 - y = 3 2/2 - y = 3/2 - y = 3/2 Since why can't be negative, move the negative over to the other side y = -3/2 Okay we fou...

Oh sorry, I did my math wrong and Divided instead of subtracting.

Do you know who they are? or if they are online at the moment?

Reiny, after working it the first 1 over, i got .016 How would u work the second one? can you show me steps by step?

Ahh okay. I didn't get it at first, but now that I read it, I got it. Thanks alot!

Thats weird. I just learned this today, but on side has sulfur and the other side does not.

(x + 5)(x + 1) (x + 5)(x + 3)

24000-8x=2100 2737.5 each year

Thanks. Can you explain to me when I have to add charges to my the thing? and when I can't?

I think its 2FeBr3 + 3(NH4)2S --->> Fe2S3 + 6NH4BR

Why don't u use cross multiply Mg with OH and have MgOH2 ?

C3H8 + O2 ----> CO2 + H2O That is the same problem on the worksheet I am looking at right now.

UHmm.. it releases energy in a form of light that you can see in the sky.

The only way to balance polyatomic ions is to use paranthesis?

I answered that in your last post.

did the problem give you points because I think that's slope intercept form.

I don't know. I don't understand your question.

I think its that arrow ----> But i do not know what its called.

ohh wait its the + sign which means reacts with.

if their slope is negative reciprocal to each other, then they are perpendicular.

Graphing is by far the hardest, UNLESS you have a graphing calculator, then its very easy. It all depends on how you want to work it. I cant really tell you the best way of doing it.

Go look back on your post, I've answered this already.

if their slope is negative reciprocal to each other, then they are perpendicular. Dude what the hell is wrong with you?

Well, it doesn't hurt to scroll down and look. You posted it like 100000 times, and it got really annoying because there are also others who have their own questions. I kind of lost my temper, sorry.

Thanks alot. I was not sure what how to write nitrous oxide.

so it does not need any charges? and isnt that an acid?

I got for final answer as 2HS + 3O2 -----> 2SO2 + 2H2O