# Chemistry - Please check

119,820 results

### Chemistry(Please check)

1) The Ka for acetic acid is 1.8e-5. What is the pH of a 3.18M solution of this acid? I did 1.8e-5 = x^2/3.18 x=sqrt 1.8e-5 X 3.18 = 7.56e-3 pH=-log(7.56e-3) = 2.12 The pH is 2.12 2) At 25 degrees celsius, the pH of a 1.75M NaCN solution (the Ka for HCN is 4.0e-10) is ? 4.0e-...

### language art CHECK

Will somebody please check this for me and see if i used the words correctly please? Having spent many years as political opponents, the two senators have developed a(n)MUTUAL respect for each other. Please check if it is correct. thank you

### chemistry(Please Check)

You dissolve 6.55 g of potassium nitrate in enough water to make a 250. mL solution. What is the molarity of this solution ?Answer: 0.0262 Please Check my answer

### Math 157

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...

### Math

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...

### 7th grade math check

Ok I was wondering if you could check these 3 problems please. I am suppose to set these equations equal but I am not sure if did them right. I think I accidently solved these systems as substitutions. The answers are suppose to be in coordinate pairs. 1) x - y = 11 -3x + y...

### Chemistry conversions check

I'm sooooooo not sure if I'm doing this right, but can someone check it please? Thanks :)) 5) Determine the mass in grams of 3.01 x 10^23 atoms of Cl (element) I got 17.5 grams...is this right?

### English-CHECK PLEASE

Ok, I figured this out (I think) but can you please check? Don't worry. I can carry the tent all by myself because it is so light. I do not even need a lantern it is so light outside. In these sentences, the word "light" is used as a: A:homophone B:homonyme C:synonym D:simile ...

### DrBob222 please check

DrBob222 please check my physics question posted at 8:55pm. The subject is drwl please check. I am not getting a response from drwl. Thanks! Mary DrWLS is not on right now. My physics is too poor to trust my answers. Bob Pursley is smarter than I am; he does physics, math, and...

### Chemistry(Please check)

. 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? ...

### Physics check

I just want somebody to check my answer on this problem please :-) There is a box which weighs 1000 kg. There is an applied force acting upon it with a force of 20000 N (horizontally). The mu is 1.2. What is the acceleration (again, horizontally) of the object? I got 8.24 m/s^...

### Math 116 algebra please check

Solve using the multiplication principle. 10x= -90 The solution is x = -9 please check

### Math (Check)

The equation y = a^x is a decreasing function a = 1) 1 2) 2 3) -3 4) .25 I think that the correct answer is 3) -3...but I am not sure why? Can anyone please check if I am right and explain why? Please....Thank you for your help!!!

### Calculus - please check my work

Differentiate each function a) y = -3x^2 + 5x - 4 b) f(x) = 6/x - 3/(x^2) c) f(x) = (3x^2 - 4x)(x^3 + 1) the answers i got for each was: a) y'= -6x + 5 b) f'(x)= -6/x^2 + 6/x^3 c) f'(x)= 15x^4 + 6x - 16x^3 - 4 please double check and let me know if these are correct, thank you.

### Pre-Algebra(please check)

Please check these simplified expressions(my answer is after the ;) 4(2k-6)-8(3-3k); -16k-(-48) 9+(-2k)+(-4)-6k; -8k+5 -x+4x-(-8x)-9+2x+1; 13x+(-8) 5(-3x+6)+8x; -7x+30 8+6x+4-8x; -2x+12 5(-m-3)+4m-10; -9m+5

### Algebra

Please check and see if my answer are correct 1). 24v^2w^5x^8-20v^7w^9= -4v^2w^5(5v^5w^4-6x^8) 2). 81-25z^2= (5z+9)(9-5z) 3). 5y^3-7y^2-15y+21=(y^2-3)(5y-7) 4). x^2+4x-12= (x+6)(x-2) 5). 3x^2-26x+16= (x-8)(3x-2) 6).4v^6+6v^5-18v^4= 2v^4(2v-3)(v+3) 7). solve for y y^2+6y+8=0 y...

### PLease Check My Work

3. T^2-25/t^2+t-20= (t-5) (t+5)/ (t-10) (t+2) 4. 2x^2+6x+4/4x^2-12x-16= 2(x+2) (x+1)/4 (x-4) (x+1) 5. 6-y/y^2-2y-24= 1/(y+4) *Please check them.- 3. (t-5)(t+5) / (t+4)(t-5) 4. 2((x-1)(x+2)) / 4((x+4)(x-1)) 5. (6-y) / (y+6)(y-4) i don't really understand what this is... but lol...

### Math 116 algebra please check

Solve for the indicated letter. e=9f, for f The solution is f = 1/9e Please check this

### math-please check my answer

0.6x + 4 < 1.0x - 1 6x + 40 < 10x - 10 4x > 50 x > 12.5 can someone please check my work and tell me if I am right?

### Math[PLease Check]

Problem: 25-x^2 6 ------ * --- 12 5-x What I got: 5-x --- 2 *PLease Check My Work. No. Factor the 25-x^2 into two factors. Then the 5-x in the denominator divides out. So then is it: 5+x --- 2 yes. 12x12

### chemistry

i have to write chemical formulas and balance them: nitrogen and oxyen---> nitrogen monoxide N2+02---->2NO nitrogen monoxide and oxygen----> nitrogen dioxide gas. NO2+O---->NO2 (i'm not sure about this, please check) nitrogen dioxide and water----> nitrous and ...

### Accounting

A check returned by a bank because the issuer's cash account balance could not cover the check is called a(n): a. Cancelled check b. Certified check c. Outstanding check d. NSF check

### drwl / bobpursley please check

I had posted three questions at 1:48pm, 2:40pm and 2:41pm and I am having problems with them. Can you please check them for me. Thanks! Repost if you are not satisified with the responses.

### Math 116 algebra please check

Simplify 6[-73-(-19-83)]=174 Please check

### Spanish-Please check

Please check-Thank you I come from the library. Yo vengo de biblioteca.

### chemistry-please check my work

Determine the mass of carbon monoxide that is produced when 45.6 g of methane CH4 react with 73.2 g of oxygen gas, O2. The products are CO and H2O. Please check my work: CH4 + 3O2 ---> 2CO + 2H20 nCH4=2.84 mol nO2=4.58 mol Limiting Reactant: 1 mol CH4/2.84 mol CH4 = 3 mol ...

### Please check-Reiny

Could you check these two problems? 3sqrt (y+2) = 3 is y = 25 Answers were: true or false I said true because I did it like this Square both sides=y + 2 = 3^3 y+2 = 27 y = 25 and sqrt (2y-6) = 3-y for y answes are: no solution 5 3,5 3 I said 3 because I did it like this: 8y -...

### Chemistry Help - Check Please

1) Describe 4 processes/forces that can explain all mechanism in Organic Chemistry? My answers: a) Electron Delocalization b) Hydrogen Bonding c) Aromacity d) Nucleophilic Substitution (SN1 & SN2) Thank you!

### Algebra-Please check

Please check- sqrt of 2x + 15 = x Answers: -5.3 -3.5 -3 5 I think according to my calculations it would be 5, correct? sqrt root of 7-x = 3-solve for x Answers: -2 2 4 -4 My choice would be 2 Is that correct- I squared both sides and came out with 7-x = 9 and then x = 2 Thank ...

### Math 116 algebra please check

Multiply 1/7×(-3/7)=-3/49 Please check

### To Brady, please check

Please check my answers down below.

### algebra

Please check my system of linear equations using any algebraic method. Show the check,if possible. 8x-6y=12 / 12x-9y=18 8x-6y=12 (eq.1) 12x-9y=18 (eq.2) 4x-3y=6 (eq.1) 4x-3y=6 (eq.2) y=4x-6 / 3 Check: Thank you for your help.

### To sam!

Was the five part unknown question for compounds A through E yours? If so, did you get it answered ok? no it was not mine! can you please check my math? can you please check my math?

### Spanish 7th grade-Please check

Please check. How would I say "I feel like drawing. Would it be: Yo tengo ganas de dibujar.

### Health care please check answer

Please check my answer thank you Verifying the accuracy of HCPCS codes is an important function in what ? I think that it is maintence of chargemasters

### Health please check my answer

Please check my answer thanks True or Faslse The term used to describe why medical treatment is necessary is procedure I say False

### Math please check answer

please check my answer :) The monthly payment of a $100,000 mortgage at a rate of 8 1/2 % for 20 years is 8678.23

### algebra

Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please

### algebra

Check this problem for me do I have negative sign right with the answer. -1(-1)+-5-5=-2/-10==-1/5 the one on top and the -1(-1) and on the bottom is -5-5. so check this answer for me. Please, Please

### Chemistry(Please check)

What is the oxidation number of chromium in K2Cr2O7 so k=+1 (2) = 2 O=-2(7) = -14 2x + 1 +(-14) = 0 2x-12=0 x=6 so Cr is 6 Is this correct?? Thank you!!

### English please check my answer

please check to see if I have the right answer thank you The patient had a radiogram performed. What doed the root word indicate I think it's b

### Math Please Check

Please check my answers! Thank you! Simplify the following expressions. Collapse “x” terms, and/or simplify fractions and exponents. 1.) (12/5) / (36/20) = 4/3 2.) x^13*x^3 = x^16 3.) x^4 / (x^2)^3 = 1/x^2 4.) x^-3 / x^2 = x^-5 5.) (x^2-8x+16) / (x-4) = x-4 6.) x^(-1/3) / ...

### PERSON!!!!!

I have no money at all no credit card or checks or anything! So can someone please tell me where to get a free background check or free record check?? I really need this please!!

### Health please check my answer

Please check my answer thanks The radiologist is able to evaluate the movement of body organs by doing what procedure A. Ultrasound B. MRI C. Film survey D. Fluroscopic exam I picked A

### drwls please check

Can you please check my physics posts. Thanks!

### Spanish-Check please! I need help

Please check-I'm having a problem interpreting these questions and I have to answer them for homework. Could you please check my translation I'm not sure what these questions mean and I have to answer them for homework ¿Qué necesitas para comer en cereal?does this ask what I...

### FRENCH WORK ASAP

please please someone check my work I don't understand it fully so I am asking if someone could please check my work thank you if it's too much I'm sorry. God Bless

### chemistry

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

### Chemistry

Please check if I've balance the equation correctly. C8H18 + 25/2O2 --> 8CO2 + 9H2O

### Chemistry

Please check my work: What is the pOH of a solution containing [H+] = 1x10-11 M? log H=14-11 3 right

### please check my answer

Please check my answer thanks :) Nurse employees at a non profit hospital neglect a patient,resulting in harm. The pt sues, in most states what would be the end result not really sure do they get charitable immunity

### Algebra-Please check

We're learning arithmetic sequences-please check this for me-it's my first day calcuulating htese and I'm not sure If t(1) = 5 and t(n) = t(n-1) + 2, find the first 4 terms of the sequence I think it would be 5,7,9,11 because the difference is 2 so I just added 2 to each of ...

### Spanish-Please check my work

Could someone please check this for me. I had to rewrite the following sentence using a direct object pronoun in two different ways. I wrote: Nosotros queremos leerlos. Los hosotros queremos leer. Thank you for checking

### calc check please?

Given the differential equation: dy/dx = y(1+x), y(0)=1, Use Euler's method with step size .1 to approximate y(.3). ... please check this for me! no one has responded to this question yet.. thanks. y' = y(1+x), y'(0) = 1(1+0)=1 ->the solution has slope 1 at the point (0,1...

### Sapnish-Please check SraJMcGin

Please check if you have time we had to select the correct answer for the two questions 1.¿Ellas te escuchan? Ellas me escuchan. 2. ¿Me escuchas? Te escucho.

### math(check answers please)

PLEASE CHECK THESE ANSWERS compare the pair of numbers use <,>,= 3/4 _ 6/8 A.3/4=6/8(I PICKED THIS) B.3/4<6/8 C.3/4>6/8 Write the decimal as a fraction or mixed number in simplest form. 3.45 A.4 3/4 B.4 9/20 C.3 3/4 D.3 9/20(I PICKED THIS

### algebra

please check and correct thanks Problem: solve and check the inequality if possible |4F+8|< 12 positive: negative: |4F+8| < 12 |4F + 8| < -12 4F + 8 -8 < 12 - 8 4F +8-8 < -12-8 4F < 4 4F< -20 F < 1 F< -5 solutions 1 and -5 or -5 < F < 1 check ...

### Spanish-Please check SraJMcGin if possible

Please check if you have time we had to select the correct answer for the two questions 1.¿Ellas te escuchan? Ellas me escuchan. 2. ¿Me escuchas? Te escucho.

### Health please check my answer

Please check my answer thanks True or False The term malignant, when used in reference to hypertension is a treatable cancer I said True

### Health please check my answer

Please check my answer The term neoplasm refers to what ? A. invasive carcinoma B. malignant growth C. growth of a tissue D none of these I say it's B

### Health please check my answer

Please check my answer thanks What does the abbrevation "AD" represent in a medical report ? My answer is both ears

### precalculus/check please

Find the difference quotient by using f(x+h)−f(x)/h 1) f(x) = √(2x+1) answer (√(2x+1+2h) - √(2x+1))/h can you check please

### please check my answer

please check my answer thanks :) four chairs at $22.00 each 1 table for $212 and umbrella for $85 What is the total of this bill if the sales tax is 6% $22 x 4 ----- 88 212 + 85 -------- 385 x 0.6 % -------------

### please check my answer

please check my answer thanks :) four chairs at $22.00 each 1 table for $212 and umbrella for $85 What is the total of this bill if the sales tax is 6% $22 x 4 ----- 88 212 + 85 -------- 385 x 0.6 % -------------

### science

Please check my work 3M solution of NaOH (1 liter worth) molecular weight: 39.99 3 x 39.99= 119.97 grams dilute to 1000mL 3 M solution of HCl (1 L) c1v1=c2v2 (12M)(?)= (3M)(1000mL) ?= 250 mL please check thank you

### Language Art (Please Check)

please check 6.which of the following is a run-on sentence? A.terri had a hard time continuing the tour she was so tired from the day's events.(I PICK A) B.som students decided to rest,so they returned to their hotel. C.washington is a great place to visit because there are so...

### chemistry

AgCl <==> Ag^+ + Cl^- NaCl ==> Na^+ + Cl^- Ksp = (Ag^+)(Cl^-) = 1.8 x 10^-10 Let S = solubility of AgCl, then (Ag^+) = S (Cl^-) = S+0.01 Solve for S. Note: A similar problem to this post (0.1 M NaCl instead of 0.01 M NaCl) was on a couple of days ago; the one who ...

### Please check history

Please check! What was the effect of the depression of the 1890s on South Carolina? a. Gold was discovered in Alaska. b. Many banks failed and railroads went bankrupt. c. Paper money was no longer backed by gold.*** d. Inflation caused farmers to run large debts.

### Algebra-Can you please check this Reiny

Can you check this: x^-3y^2/x^2y^-4 I think the answer is y^6/x^5 Thanks for explaining the other problem

### business

can you please check my answers to the questions i realy need to check them if they right or wrong

### Chemistry

Can you please someone check my answer for me? I don't know how to start thses answer. Chemistry is not my things. Please give me answers. :( a)Determine the number of grams in 0.750 moles of the compound Iron(II)phosphate: Fe3(PO4)2. Answer: ? b)How many atoms of iron are in ...

### Math please check answer

Please check my answer thanks :) Add the following and reduce answer to lowest terms. 1/3 +5/6 + and 3/8 ----------------------- 1/3 = 8/24 5/6 = 20/24 5/6 = 9/24 -------------- 37/24 = 1 13/24

### chemistry

the Ksp of Bi2s3 at room temmperature is 1.60x10-72, what is its solubility in g/100 ml? Please help me with the solution. Our teacher haven't discussed this yet so I have no idea how to solve this.. and if i ever got the answer with your solution. could you please check my ...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### please check

5 x < - 25 can you check. 5x<-25 25 -------- 0 so that equals x < 0 and i have a question is my teacher trying to find a method or an answer from me?

### Calculus (Check)

This seems to easy. Check please. Find. Lim (x^2)-4 x->2 e I substitute in 2 (2^2)-4 e gives me 4-4 e So my answer is e^0 or 1.

### Math please check answer

please check my answer thanks What would be the amount of compound interest on $ 8,000 invested for one year at 6 %, compounded quarterly ? (need to show all of your work ) ok this is what I got $8,000 x 0.6 = $ 480 $ 480 / 4 = $120 $120 x 0.6 / 4 = $ 121.80 $8,241.80 x 0.6 /4...

### Chemistry. Please check my answer!

A piece of lead with a mass of 27.3 g was heated to 98.90oC and then dropped into 15,0 g of water at 22.50oC. The final temperature was 26.32oC. Calculate the specific heat capacity of lead from these data. This is what I did. Could you check my answer? I would really ...

### Polynomials check my answer

My brother said I did this wrong can someone check this for me please X Y-1 = sum(x)+ (y-1)=(X+y-1) diff(x)-(y-1)=(x+y+1) Product (x) (x-1) = (xy-1) = (xy-1)

### Chemistry

Can someone please check this for me? C4H8+5O2-->3CO2+4H2O+C Butane is a gas and .01 g of it is burned. Is .00218 g of carbon the result? Thanks

### chemistry

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

### chemistry

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

### Vectors, please check drawing

Could you check to see if Ive done this right? h t t p : // imageshack . us/photo/my-images/269/vectoriz . j p g /

### chemistry

hi, Can you please double check to see if i have got this right? Is the empirical formual for oxide of arsenic As2O5? Cheers ;) Arsenic forms two oxides with oxygen. One is As2O5, the other is As2O3. I'm glad you posted today; please tell your friend you were talking with ...

### Chemistry

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 Si 1g/1000mg = .00568g ...

### grade 12 chem - check my answer again please

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...

### math plase check

What number would be used to represent a temperature of 7- degrees below zero. I think its is -.70 please check

### Math ~CHECK MY WORK PLEASE~

Hello, Please check my answers, with stars (*) are my answers! Please check if they are wrong please tell the right answer and why it is right (explain it) so I can understand why! Thanks! For questions 1-2, solve the inequality. 1.) x + 8 < -28 a~ x < -36 ****** b~ x &...

### sentence correction

I don't see anything wrong with this sentence: It will be greatly appreciated if the bill is paid by check when possible. You're right; there's nothing wrong with this sentence. But you can make it much better by putting it in the active and not passive voice. We would ...

### Chemistry

Please check this over and see of they are right...if they are not can you please tell the the right answer and explain how you got it. I think I am getting myself confused. Thank you. Write the neutralization reaction for each of the following. Balance the equations. a. HI(aq...

### math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...

### Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...

### English (Please check Ms. Sue)

Please check this. Thanks! Imagine you are writing are research paper on Margaret Atwood's feminist ideas. Which of the following sources would you consider a secondary source? a. an interview with the author b. Margaret Atwood's The Penelopiad c. an essay about feminism in ...

### English

Now, let's check how well you can use the expressions you've learned. I will distribute handouts. You have to solve the problems. Are you finished? Then, I'll check the answers. Look at the answers on the blackboard. Check your answers. How many students have 10 points? Are ...

### Pre-Calculus-Please check

Please check: 1.Find polar equation of x^2 + y^2 = 10y subbed r^2 for x^2 + y^2 and sin(theta sin for y =r^2=10sin(theta) 2. y=5 r=5/sin 3. x^2+y^2 =x^2 + y^2 =2x+3y

### Health care please check my answer

Please check my answer thanks What does term Apex represent . A 65 year old has a murmor over the apex of the heart. A. tip B. nearest the middle C. front D. Back I think it is A tip