# Questions Asked onJuly 22, 2007

1. ## science( chem)

When 100.0ml of a weak acid was titrated with 0.09381M NaOH, 27.63ml were required to reach the equivalence point. The pH at the equivalence point was 10.99. What was the pH when only 19.47ml of NaOH had been added ? I'll just post my work and I need

2. ## maths

the sum of N positive integers is 19. what is the maximum possible product of these N numbers? thx. Nice problem. Let's look at some cases 1. N=2 clearly our only logical choices are 9,10 for a product of 90 It should be obvious that the numbers should be

3. ## science( chem)

When a 0.1M solution of weak acid HA was titrated with a 0.1M NaOH. The pH measured when Volbase=1/2Voleq point was 4.62. Using the activity coeficents, calculate pKa. fA-=0.854 and fHA=1.00 For this I'm confused once again. I know that using the activity

4. ## Finance; Stock Valuation

Early in 2007, Inez Marcus, the chief financial officer for Suarez Manufacturing, ws given the task of assessing the impact of a proposed risky investment on the firm's stock value. To perform the necessary analysis, Inez gathered the following information

5. ## Chemistry

The output of a diesel generator, which contains a mixture of CO2 and H2O gases, is collected in a sealed vessel at 447 K. As the mixture cools to 298 K, the pressure falls from 3.0 atm to 0.80 atm. What is the ratio of CO2 to H2O in the mixture? Have you

6. ## algebra/inequalities

help!I am stuck: 2x/4 + 4 = 10x/4 + 10 add -4 to each side. 2x/4=10x/4+6 multpily each side by 4 2x=10x + 24 subtract 10 x from each side. -8x=24 divide each side by -8

7. ## science( chem)

The total Carbon dioxide content (HCO3- + CO2) in a blood sample is determined by acidifiying the sample and measuring the volume of CO2 evolved with a van slyke manometric apparatuses. The total concent was determined to be 28.5 mmol/L. The blood pH at

8. ## maths

eight points lie on the circumference of a circle. one of them is labelled P. chords join some or all of the pairs of these points so that the seven points other than P lie on different numbers of chords. what is the minimum number of chords on which P

9. ## math/algebra

I have a triangle one side = 3 side 2 = square root5 - square root 3 side 3 = square root 5 + square root 3 I can get the answer 3 and I know I am missing the square root part of the equation can you help me by showing how this problem is worked so I can

10. ## motorised gates

Try this website: http://www.howstuffworks.com/ Try different search terms until you find what you're looking for. =) how do they work ? A trick many employ to open and close gates: they use an endless helical drive screw, so the motor turns the screw only

11. ## Exceptional children

Does anyone know of some great websites that I can get some info on disabled or exceptional children performing self-care tasks on a daily basis? (Like brushing teeth, taking a bath). I need info on the daily struggles these kids face. I need to do a tasks

12. ## Riddles, etc.

Since riddles aren't homework, Chris's riddle and many others need to be posted in the Riddles section at the very bottom of the main Jiskha page. http://www.jiskha.com/net_riddle/ Thanks. =)

13. ## math/algebra

I keep confusing myself. Please check and show me where I am mixed up. (8+ ã48)/4 = (8+ ã(2 .24))/4 =1+2ã6 where am I missing it?

14. ## World Religions

Many people see life on earth as constant worry, physical poverty, spiritual alienation, sickness, hatred, mindless toil, and death. The ultimate goal of nirvana or being one with the Atman seems infinitely better than suffering on earth. For more

15. ## math, algebra II

Can someone explain to me step by step how the book got to this answer i want to understand the steps....thanks Find the inverse, if it exists,for the matirx (*I used the underscore to separate the numbers within the matix) -2_1_3 3_-1_2 -4_2_0 the answer

16. ## math help

Can someone explain to me the following step by step , i 've looked in websites , plus the book and i want to understand how this problem has this answer. Problem #1 Find the inverse if it exists, for the matrix. -2_1_3 3_-1_0 -4_2_0 Answer is: -4_6_5

17. ## math,help

can someone explain to me this one as well step by step...thanks Problem #2 Solve the matrix equation AX=B for X by finding A to power. A= 2_-1_3 -3_4_-5 -4_0_6 b= 9 6 -9 Solution is: 5.43 8.22 2.12

how do I write a business solution of at least 350 words addressing a business communication problem? First you need to identify the business communication problem you want to address. Then decide on three or four ways to solve this problem. I suggest you

19. ## Statistical Analysis

I have an assignment over surveys and I am having trouble with a question. Any help would be appreciated. Question; How can one work to ensure the participants of a survey will have their responses kept private and the information gained is unbiased?

20. ## Ethics

What moral responsibilities would a leader have working in the dental field. http://www.cda-adc.ca/en/cda/about_cda/code_of_ethics/index.asp You may divide the normal responsibilities into two major categories, One is called "--the beneficence model (to

21. ## HELP

The general manager of a business encounters many different types of business transactions. Provide an example of a transaction that would describe the effect on the accounting equation. Each situation is independent of the other situations. a. The

22. ## math

Hello tutors by any chance is there anyone who can assit me with theprevious problems that i posted..dealing with math subject Here is a website explaining how to invert a 3x3 matrix. http://www.everything2.com/index.pl?node_id=1271704 Many steps are

23. ## Math

How do you write equations for perpendicular lines? I will assume you know how to find the equation of a line if you know the slope and a point on that line. The key thing to remember is: Two perpendicular lines have slopes that are opposite reciprocals of