Friday
November 21, 2014

Posts by Lucinda


Total # Posts: 30

Statistics
this is pretty much what i thought. and also being december with xmas shopping etc...sales should usually be high making a profit also...?? so many things not given in the question that really would determine and agree or a disagree. Thanks, wanted to make sure i was on the ...
March 11, 2013

Statistics
I am struggling with how to answer this. It seems not enough information is given so it is really hard to agree or to disagree. (this is uni statistics) Assume you are the Store Manager for Coles in Wagga at the beginning of December 2012. An accountant in head offce has ...
March 11, 2013

CHEMISTRY> HELP QUICK! pls
Calculate the reaction free energy of: H2(g) + I2(g) 2HI(g) when the concentrations are 0.026 mol L-1 (H2), 0.33 mol L-1 (I2), and 1.84 mol L-1 (HI), and the temperature is 700K. For this reaction Kc= 54 at 700 K. +11.6 kJ mol-1 0 kJ mol-1 -11.6 kJ mol-1 +2273 kJ mol-
September 5, 2010

CHEMISTRY> HELP QUICK! pls
Use the following thermodynamic data at 298 K to determine the equilibrium constant at this temperature for the reaction of iron in steam to form hydrogen and iron(III) oxide. 2Fe(s) + 3H2O(g) 3H2(g) + Fe2O3(s) Substance Fe(s) H2O(g) H2(g) Fe2O3(s) ÄH°f (kJ/mol) 0 -...
September 5, 2010

CHEMISTRY> HELP QUICK! pls
i figured dH to = -664, the dS = -114. then i use equation> dG = dH -TdSand i got 333.08 kJ
September 4, 2010

CHEMISTRY> HELP QUICK! pls
gaby can you show me how you did this? i kept getting 333
September 4, 2010

CHEMISTRY> HELP QUICK! pls
Use the given data at 298 K to calculate ¦¤G¡ã for the reaction 2NO(g) + 2H2(g) ¡ú N2(g) + 2H2O(g) Substance NO(g) H2(g) N2(g) H2O(g) ¦¤H¡ãf (kJ/mol) 90 0 0 -242 S¡ã(J/K¡¤mol) 211 131...
September 4, 2010

Algebra 1
not sure if this is right but... do you just square root it twice- giving 4.304cm. then wourk out the area? I dont have the picture so i'm assumming its a cube/square.
September 4, 2010

CHEMISTRY> HELP QUICK! pls
1. The rate of a chemical reaction may be defined as: a) The speed at which a molecule travels from point A to point B. b) The change in concentration of reactants or products per unit time. c) The change in concentration of reactant divided by change in concentration of ...
August 28, 2010

CHEMISTRY> HELP QUICK! pls
1. What is the amount of oxalate in 2 mL of 0.035M solution? a) 7 ¡Á 10¨C2 mole b) 1.75 ¡Á 10¨C2 mole c) 7 ¡Á 10¨C5 mole d) 1.75 ¡Á 10¨C5 mole 2. Sodium oxalate may be prepared by titrating oxalic acid (C2H2O4...
August 28, 2010

CHEMISTRY
Calculate the ƒ¢H‹ rxn for the following reaction. ƒ¢H‹ f [H2S(g)] = -21 kJ/mol; ƒ¢H‹ f [SO2(g)] = -297 kJ/mol; ƒ¢H‹ f [H2O(l)] = -285.8 kJ/mol; 2H2S(g) + SO2(g) ¨3S(s) + 2H2O(l) a. ...
August 22, 2010

CHEMISTRY> HELP QUICK! pls
A system loses 14.2 kJ of heat while performing 7.2kJ of work on the surroundings. If the initial internal energy, E, is 77.6 kJ, what is the final value of E? 56.2 kJ 70.6 kJ 99.0 kJ 84.6 kJ
August 20, 2010

CHEM 1B
Carboxylic acids are stronger acids than alcohols A. This is because the carboxy anion is delocalised. B. This is because the hydrogen atom is delocalised. C. The O-H bond in carboxylic acids is very strong. D. This statement is not true One characteristic of monomers that ...
August 7, 2010

nursing
hemothorax is an accumulation of blood/fluid in the plueral cavity, ussually caused bt trauma. i would go with D. a good book every nurse should have, i do, is MOSBY'S DICTIONARY. ISBN: 0815148003 it's worth every cent!
August 6, 2010

nursing
the answer is in the question. the "radiopaque" would suggest xray/scans/ultrasounds...therefore the correct answer is D. angioplasty is surgery to correct/stablise vessels.
August 6, 2010

organic chem
well, willy. Is it A or D. you are confusing me. i know that if you changed the question and swapped the addition and condensation around the answer is B.
August 5, 2010

organic chem
One characteristic of monomers that form addition polymers that is not common in monomers which form condensation polymers is: a. the presence of alkyl side chains b. the presence of two functional groups. c. the presence of pi bonds. d. None of the above.
August 5, 2010

Chemistry
1. You will need 600mL of a 0.5M NaOH solution. 3M NaOH is provided. Determine how much of the 3M NaOH you will need and write a procedure in your notebook for making the solution.
June 16, 2010

CHEMISTRY> HELP QUICK! pls
I GOT THIS WRONG IN AN ASSIGNMENT. I HAVE AN EXAM IN 2 DAYS. CAN YOU SHOW ME HOW TO DO IT PLS. What is the pH of a 2.62 x 10 -1 M NaNO2 solution ? NB the pKa for HNO2 = 3.153. 12.13 13.42 1.87 8.29 0.58
June 4, 2010

CHEMISTRY> HELP QUICK! pls
what is the pH of a 2.62x10^-1 M NaNO2 solution? NB the pKa for HCN=9.212 12.13 13.42 1.87 8.29 0.58 and also; what is the pH of a 2.62x10^-1 M HCN solution. NB the pKa forn HCN is 9.212. 4.90 9.21 0.58 11.32 13.42
June 1, 2010

CHEMISTRY> HELP QUICK! pls
i have an exam friday and cant figure this question out! What is the pH of a 2.62 x 10 -1 M HCN solution ? NB the pKa for HCN = 9.212. 4.90 9.21 0.58 11.32 13.42
June 1, 2010

CHEMISTRY
In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the best indicator for such a titration A. ...
May 29, 2010

college chemistry
In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong acid. Given that the final NH3 concentration (approximate) is 0.2M and that pKa for NH4+ is 9.2, choose the best indicator for such a titration ...
May 27, 2010

college cemistry
What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241 8.94 9.24 8.77 9.72 9.54
May 27, 2010

chemistry
What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241 8.94 9.24 8.77 9.72 9.54
May 27, 2010

chemistry
An acid HA has Ka = 2.28 x 10 -4. The % ionisation of this acid in a 0.170 M solution of the acid in water is closest to 3.662 % 0.623 % 0.498 % 2.930 % 0.436 % 2.564 % i have an exam in 1 week and these are the types of questions i dont understand
May 27, 2010

chemistry
What is the pH of a 2.62 x 10 -1 M HCN solution ? NB the pKa for HCN = 9.212. 4.90 9.21 0.58 11.32 13.42
May 27, 2010

Chemistry
calculate the concentration of sodium benzoate that must be present in a 2.0M solution of benzoic acid (C6H5COOH) to produce a pH of 4.00. THIS IS THE ONLY INFORMATION GIVEN. I CANNOT FIND Kb ANY WHERE IN MY TEXT NOR DOES IT GIVE US A VOLUME. CAN ANYONE HELP?
May 27, 2010

Physics
Do they ever get back to you, I know who's class you are in. lol This is funny!! don't worry, I won't tell anyone!!
January 24, 2010

science
why are pencils yellow i have to come up with a tall tell
November 6, 2008

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