Chemistry+need help checking work

111,115 results

Math

Solve the equation for d 0.2(d-6)=0.3d+5-3+0.1d I had d=-16 Work: 1. distribute 2. 0.2d-1.2=0.3d+5-3+0.1d 3. 0.2d=0.4d+3.2 4. -0.2d=3.2 5. divide 6. d= -16 I even did a check 0.2(d-6)=0.3d+5-3+0.1d 0.2(-16-6)=0.3(-16)+5-3+0.1(-16) 0.2(-22)=0.3(-16)+5-3+0.1(-16) -4.4=-4.4 Is ...

Math

which ordered pair is the solution of the following system of equations? y=2x-3 x+y=3 1) (1,2) 2)(2,1) 3)(3,0) 4)(3,3) MY work: y=2x-3 x+(2x-3)=3 3x-3=3 +3 +3 3x/3=6/3 x=2 x+y=3 2+y=3 -2 -2 y=1 so I got (2,1) which would be answer 2 Is this correct? Thanks for checking my work

Math - Precision and Significant Digits

Please help me with the following: Find each product or quotient. Use significant digits. 0.0505m x 665m A. 33.6 m^2 B. 33.58 m^2 C. 33.50 m^2 D. 3.582 m^2 I think the answer is A. Is this correct? Please help me by checking my answer. Any help will be appreciated!! :) P.S.: ...

checking to see if this is right

just checking to see if i have this problem correct Sammy can cut wood twice as fast as Joe. When they both work together, it takes them 4 hrs. how long would it take them to do the job alone? 4/x +4/x+2 = x^2+2 4x+4x+8= x^2+2 8x+8= x^2+2 x^2-6x-8=0 (x-4)(x+2) x=4 x=-2 since i...

Garland High school

Suppose you must maintain a balance of least $500 in your checking account in order to have free checking. The current balance in your checking account is $635.27. Which inequality describes how much can write a check for a and still have free checking? A. 635.27>500-x B. ...

Chemistry

I did the work, but I need help checking it... A compound contains 83.24% by mass carbon. Calculate the molar mass of the compound if it contains 5 moles of carbon per mole of compound. This was my process: I took 100g of compound and found that there are 83.24 g C in that ...

Earth Science - Please Check My Answer

Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please help me by checking ...

Chemistry+need help checking work

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 buying the "E" button ...

Chemistry

Is the molar mass of SiO2 60 g/mol (I took the molar mass of Silicon-28, and added Oxygen's atmoic mass-16 and doubled it since it's diatomic). Thanks for checking my work.

Math

what is the value of 3^0+3^-2? so I did 3^0=1 and 3^-2 =1/9 so 3^0+3^-2= 1 1/9 Is this correct? Thank you again for checking my work.

Chemistry(Please check)

Last question, I just want to make sure I understand the concept of hybridization. For carboxylic acid the hybridization is: CH3= sp3 because there are only single bonds COOH= Sp2 because the oxygen is double bonded to the C Is this correct? Thank you for checking my work!

algebra 1

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...

math

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...

algebra

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...

Algebra 1

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...

math

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...

communication

Repeating in your own words the verbal content of the critic's message is: paraphrasing. checking for feelings. checking for inferences. buying time with limited agreement.

math

what is the expression for the factored form of 1/4y^2-36? I got (1/4y-6)(1/4y+6) Is this correct? Thanks for checking my work

math

Factor completely, the expression 2x^2+6x-20 I did 2(x^2+3x-10) then it can go down to 2(x+5)(x-2) Is this correct? Thanks for checking my work

buisness communication

Repeating in your own words the verbal content of the critic's message is: paraphrasing. checking for feelings. checking for inferences. buying time with limited agreement.

ENGLISH

QUICKLY RUNNING OUT And your question is?? You've received several answers. Now, it's your turn. What parts of speech do you think these words are? I just need help. Well , do you think you can help me and explain it? I wasn't expecting people to give me the answers. I was ...

math

The product of 3^4*3^-2 is so I multiplied the exponents and got 4*-2 =-8 so my answer is 3^-8 Is this correct? Thanks for checking my work

Algebra

ello i need help factoring I haven't had factorin sense Algebra one and now am in Algebra two and our school is screwed up were they shove in a year of Euclidean Geometry and Basic Trig inbetween first two years of Algebra... so i need to factor X^2-12X+35 I can sit there for ...

algebra

Solve and check all proposed solutions. Show work for solving and for checking. x+1/x-1 - 2/x^2-x=0

Algebra/%%$#!!!

F(x)=1/4 (x+7)^2+7 Looking for the vertex and the max or min for the above..? And thank you for checking my work, nice to know I get some of it.

math

solve the inequality -5(x-7)<15 algebraically for x -5(x-7)<15 -5x+35<15 -35 -35 -5x,-25 -5 -5 divide both sides by -5 x=5 is this correct? Thanks for checking my work.

Just checking Math-Absolute Value

The equation for "the distance from x to -4 is less than 12" is |x-4|<12? I'm just checking my answers.

Math

Solve the equation: 4/3-x + 1/x+9 = 5/3-x Check all proposed solutions. Show work in solving and in checking.

Algebra Help

Please solve and check all proposed solutions. Show work for solving and checking: (x-2)/(x-1) + (2)/(x^2-1) = 0

Personal Finance

PLEASE HELP ME ASAP!!!!!!!!!!! 31. In order to effectively manage money, you need: a. A computer b. An online checking account c. A budget d. A high paying job 35. Which statement is not true about extended warranties? a. Most warranties are about 50-60% commission. b. Only 12...

Math

Avirus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files?

math

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all files?

Caplan

A virus-scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files

Algebra

Solve the equation. Check all proposed solutions. Show work in solving and in checking. Root3-x = x-1

Algebra

Solve the equation. Check all proposed solutions. Show work in solving and in checking. sqrt3-x=x-1

math

What is the value of x in the equation x/2+x/6=2 I found a common denominater of 6 3x/6+x/6=2 4x/6=2 mult. both sides by 6/1 and you get 4x=12 so x=12/4 or x=3 Is this correct/ Thanks for checking my work

math

Business and finance. Avirus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files?

I need checking

Whats the 2nd derivative of 4xsecx I got 4secxtanx+8xsecxtan^2x

science -heredity

there are about 100,000 genes in each cell. Why would it be important scientists to identify what every one of these genes does? I put Genes will describe a trait of a person, example, it will determine if a person will be small or tall; blue or brown eyes and brown or blond ...

Spanish

Fill in the blank. _____ carteles estan al lado de la puerta. a. El b. La c. Los*** d. Las Just checking my work:) *** - My Answer Thanks, Kaai97

Spanish

Fill in the blank. Donde _____ tu mochila? a. estoy b. esta*** c. estamos d. estais Just checking my work:) *** - My Answer Thanks, Kaai97

Spanish

Fill in the blank. Donde _____ tu mochila? a. estoy b. esta*** c. estamos d. estais Just checking my work:) *** - My Answer Thanks, Kaai97

Physics 11

Can someone explain what work total is? In my lessons it said Work total is the sum of all work & showed an example of different work being added together. An assignment after that however made me think that may not be the case... Do I need to add the work in some cases or is ...

Spanish

Schools in Mexico _______. a. have no computers b. have 10 to 12 computers c. are working to increase the student/computer ratio*** d. have plenty of computers because they work with large computer companies Just checking my work:) *** - My Answer Thanks, Kaai97

Math 3371

In a certain year, 26% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 3,000 teenagers, what number of teenagers ...

Spanish

Fill in the blank. La puerta esta al lado _____ sillas. a. del b. de la c. de los d. de las*** Just checking my work:) *** - My Answer Thanks, Kaai97

Math

Mark's checking account is overdrawn by $35. How much does he need to deposit to have a balance of $100?

pre-algebra

Terry has 43 dollars in a checking account.If terry writes a check for 62 dollars what is the new checking balance?

Math

My equation Y=4Y+30 I did; Y-4Y=-3Y My equation -3Y=30--->30/-3 I get -10 yet the checking does not work. Does the negative go on the whole 3Y or just the 3?

Math

Is i^2=-1 for how many integers N is (N+i)^4 an integer? so far i have factored out (N+i)^4 to be ... n^4+2n^2+1 i would suggest checking that, but from there i don't know where to go...doesn't it work for every integer?

Algebra II-Please check my solution

Solve by elimination method-thanks fro checking my work 2x + 3y= 2 multiply this equation by 2= 4x + 6y = 4 4x-2y = -28 4x + 6y = 4 -4x -2y = -28 8y = 32 y = 4 2x + 3(4) = 2 2x + 12 = 2 2x + 2-12 2x = -10 x = -5 solution = (-5,4)

math

what is the slope of the line represented by the equation 4x+3y=12 1) 4/3 2) 3/4 3) -3/4 4)-4/3 I did 4x+3y=12 -4x -4x 3y=-4x+12 /3 /3 divide each side by3 y=-4/3x+4 so I got answer 4 because the -4/3 is the slope Is this correct? Thanks for checking my work

Math

Tonia deposited a total of $174.52 into her checking account. She also withdrew a total of $186.15. Use addition to find the net change in Tonia’s checking account.

Physics (Checking answe)

Sorry for re-posting but I need to know if I did it right, please help, I worked out the problem I just want to know if I did it right. A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from the horizontal. Find ...

algebra1

the problem is 5f+7 less than or equal to 22. can anyone please work this out for me and check it for me? and what i mean by checking it is like when you get the answer you check it and make sure its write.

Algebra 1

I'm completeing parts of my homework, and need help checking some of the problems. Could someone tell me if this is right? If it's not could you show me how to work it correctly? I'm not looking for someone to do my work, just show me how. There are no shortage of questions ...

Chemistry

Hi I need help with another balancing oxidation-reduction reaction: Cu(s) + Ag^1+(aq) → Cu^2+(aq) + Ag(s) My work: Cu (s) --> Cu^2+ (aq) + 2e- 2 [1e +Ag^1+ (aq) --> Ag(s)] Cu(s) + 2 Ag(aq) --> Cu (aq) + 2 Ag (s) Is this right? And I need help with this one... Zn...

chemistry

how many grams of AgNO3 would need to be dissolved in 1 liter, 500mL, and 100mL in order to make a 1M solution? need to show work and answers are in grams....????

math

from the expression below, which one is not factorable? 1)x^2+4x+6 2) 3ab^2-16a 3)x^2-441 4)4x^2+19x-5 I thought the answer was 2) b is not in the second part of the equation(the 16a) Is this correct? Thanks for checking my work

english

i need help, i need someone to critique my work. work will be send through email. thanks

Chemistry I

For the methanol combustion reaction 2CH3OH(â„“) + 3O2(g) ----> 2CO2(g) + 4H2O(g) estimate the amount of P [change]V work done and tell whether the work was done on or by the system. Assume a temperature of 27â—¦C. 1. 2.5 kJ, work done by the system 2. 2.5 kJ, work...

math

A tree, in danger of falling , stands 65 feet from the house. The angle of elevation from the bottom of the house to the top of the tree is 50 degrees. If the tree should fall directly towards the house, will it the house? show all work and explain your answer. tan50/1=x/65 x=...

Science

In the space below, write a paragraph describing the work of a chemical engineer. Include a description of the different industries that they work in and the skills they need to be successful Need Help!!!!

Chemistry

Jack drives 6.45 km to work and his car gets about 0.0147 km per gram of gasoline. Using the balanced chemical equation (you need to find out this equation by yourself), how many grams of CO2 is produced in this trip to work

Math

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files? I am not sure how to set this problem up, can someone please help! 40% = 40/100 40/100 = 300/x Solve for x. I...

Math

Solve for x: 5/x+6+2/x^2+7x+6=3/x+1 5/x+5+2/(x+6)(x+1)=3/x+1 5(x+6)(x+1)/x+6+2(x+6)(x+1)/(x+6)(x1)=3(x+6)(x+1)/x+1 5(x+1)+2=3(x+6) 5x+5+2=3x+18 5x+7=3x+18 2x=11 x=11/2 or 5 1/2 is my method correct? and I need assitance checking my answer. Thanks for your help! You need to use...

pennfoster

Mary Palm's checking account had a starting balance of $785.63. She wrote a check for $57.00 for groceries and a check for $125.00 for a car payment. Yesterday she deposited $57.25 in her checking account. What is Mary's current balance

math

will someone check my work please?A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files? 950 seconds Gasoline accounts for 85% of the motor fuel consumed in the ...

Math

You’re involved in the design of a new facility. It is important for people to move between work stations quickly. Based on the figure below, how many feet would a person need to walk to get from Work Station 1 to Work Station 3? Work Station 1 5 feet middle height Work ...

math

Oatmeal is packed in a cylindrical container The diameter of the container is 13cm and its height is 24 cm. Determine in terms of TT (pi), the volume of the cylinder, in cubic centimeters v=TTr^2h v=TT6.5^2(24) v=1014 TT(pi) Is this correct? Thanks for checking my work

Economics

Assume that a local bank sells two services – checking accounts and ATM card services. Mr. Done That is willing to pay $8 a month for the bank to service his checking account, and $10 a month for unlimited use of his ATM card. Ms. Been There wants to pay only $5 for a ...

math

the right triangle ABC,<ABC is the right angle. If sin<C=3/5, find the Tan<A. I did 0/9 and put it in the calculator and got 4/3 Is this correct? Thanks for checking my work

Math

Barbara had $123.54 in her checking account. she made a deposit of $45.62. when she went shopping later that day, she saw a coat she really wanted. it was on sale for 40% off the original price of $240. Assuming that she bought nothing else that day, does she have enough money...

Math

Chaz is a college student. He has a checking out balance of -$52.00. His roommate Will's checking out balance is -$59.25. Chaz thinks that Will owes more to the bank than Chaz does. Is Chaz correct?

math

What is the solution to x+5+x+1+x=3(x+2)+1 1)x=0 2)x=3 3)no solution 4) infinite I got #3 no solution x+5+x+1+x=3(x+2)+1 x+5+x+1+x=3x+6+1 3x+6=3x+7 -3x -3x 6=7 so no solution Is this correct? Thanks for checking over my work.

finance

computing checking account balance. based on the following information,determine the true balance in your checking account. balance in your checkbook-$356 balance on bank statement,$472 service charge and other fees, $15 interest earned on account $4 total outstanding checks $...

algebra

Delila has $1200 in a saving account and in a checking account. The ratio of money in saving to money in the checking is 3 to 2. Use a system of equation to find how much money is in each account .

algebra (checking answer)

Checking to make sure I did it right.. Remainder theorem to find the remainder when f(x) is divided by the given x-k f(x)=x^3-4x^2+2x+4; x+2 2 x -4 2 4 1 2 -4 4 1 -2 -2 8 2)x^3-4x^2+2x+4. (X^3-2x^2-2x) is the answer x^3 -2x^2+-2x -2x^2+4x 6x+4 -2x+4 8x+8 I'm not sure the ...

math

MS.powell has -$25 in her checking account after withdrawing money from the atm .How much did Ms.Powell withdraw if she had $85 in her checking account before she withdraw the money?

Math

The question is that the length of a rectangle is 15 and its width is w. The perimeter of the rectangle,at most,50. Which inequality can be used to find the longest possible width? A. 30+2w<50 b. 30+2w<or=50 c.30+2w>50 d. 30+2w>or=50 so I did L=15 p=2(15)+2w<or=...

math

the dimensions of Gina's dining room table are represented by (3x-7) and (30-x). Find the perimeter 0f the table in terms of x. I did (3x-7)(-x+30) -3x^2+90x+7x-210 -3x^2+97x-210 Is this correct? Thanks for checking my work, I appreciate it

English

Choose the answer that best matches the word "transient." A camp could be described as transient because it is a. sheltered b. temporary*** c. flimsy d. insular Just checking my work:) *** - My Answer Thanks, Kaai97

statistics

The First National Bank of Wilson has 680 checking account customers. A recent sample of 60 of these customers showed 32 to have a Visa card with the bank. Construct the 98 percent confidence interval for the proportion of checking account customers who have a Visa card with ...

College: Chemistry

Hi there, I need help on my homework for chemistry and I do not understand the step on how to work this problem out. Please help me with this problem: On a Sunday morning while having your breakfast you determine that you need about 2.95X10^(5)J to heat water for your tea in ...

English

I left out the following sentences. Thank you very much, Writeacher. 1) I think everybody would work at a passion but many times (mistake) this is often not possible. 2) If I worked, I would work at a job because I'll need (I need) to put aside money for me and my family. 3) I...

Math

I already figured most of these out, but I need to learn how to SHOW MY WORK! Can anybody teach me? I need to find the value of each letter. Once again, how can I show my work? g+g+g=d j+e=j g^2=d b+g=d f-b=c i/h=a(h>a) a*c=a

science

Need to prepare a lab that requires 1000ml of 1.0M HCl. You find some 3 M HCl to work with. What do you need and how would you work it out?

Chemistry

What volume would be occupied at 0°C and 1 atm by 3 mol CO₂(g)? I just might need someone to help me work this out, I would greatly appreciate it! I don't understand this chemistry problem.

fine arts

Describe what work the three brothers from Flanders are known for and how this work was illustrated. i think their most known work is the "Book of Hours" . but i need help in the second part

math

On the set of axes below, graph the function represented by y=cubed root of x-2 for the domain -6< or equal to x< or equal to 10. x column I did -6, 1, 2 , 3 ,10 y column I did -2, -1, 0, 1, 2 Then I plotted these points. Is this correct? Thanks for checking over my work.

Science physics

mandy drops a 2.0kg book from a height of 4.5m. how much work has gravity done on the book? M=2.0kg D= 4.5m Not actually sure what to do next. Because none of the formulas work. I need work but I don't even know the force. To find force I need mass which I have but I don't ...

chemistry

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

Social Studies

In what way is Islam most likely to impact Muslims during their work days? A. they must leave work early B. they will not participate in leisure activities after work C. they cannot have certain jobs D. they need to pause during their work to pray ?

math

Jesse rents 2 movies and 4 video games for a total of $18.70. At the same time, Dan rents 3 movies and 2 video games for a total of $15.25. How much does their friend Sabrina need to rent a combination of one game and one movie from the same video rental store? SO I HAD V= ...

math

rewritten as a power of 2 with a rational exponent, the expression 4*squared root of 2 would equal which of the following. 1) 2 so 2 is just 2 2)2^2 which would =4 3) 2^5/2 this =5.65 4)2^5 this=32 4*square root of two=5.65 so I believe the answer is 3. Is that correct? Thanks...

Algebra II

Solve, round to four decimal places if necessary: log4(x-9)=2 Answer: x-9=4^2 x-9=16 x=11 log4(z)+log4(z-3)=1 Answer: z+z-3=1 2z=4 z=2 Thanks for checking my work.

Social Studies

The Qing Dynasty produced and exchanged items such as Chinese pottery with English colonists during the 1800s in order to obtain heavily demanded what? a. silks. b. cotton. c. furs.*** d. tea. Just checking my work:) *** - My Answer Thanks, Kaai97

Chemistry-Balancing Equations

I need help balancing equations. _C7H60+_02->_C02+_H20 I don't know how to balance it because when i do it just won't work out ill have too much on one side and it just wouldn't work. i know im missing a rule or something.

math

the perimeter p of a rectangle can be found using the formula p=2(l+w) where l represents the length and w represents the width. which equation represents the width in the terms of p and l. a) w=2(p-l) b)w=p-l/2 c) w=2p-1 d) w=p/2-1 p=2l+2w p-2l/2=w p/2-l=w the answer would be...

Need all the help i can get

Hi i'm pretty new to this and i don't know what to do?So i put these questions up im not sure if my answers will show up because i used color letters, but i need help checking and explaining steps N 108 is 36% of what number? Write and solve a proportion to solve the problem. ...

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