Ask a New Question
Search
Questions and answers by
Lucinda
Questions (22)
What are the parts of an exhaust system for a high bypass turbo fan and jet engine.
0 answers
426 views
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.
2 answers
666 views
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),
0 answers
1,040 views
Use the following thermodynamic data at 298 K to determine the equilibrium constant at this temperature for the reaction of iron
0 answers
1,089 views
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)
6 answers
957 views
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
3 answers
1,857 views
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
3 answers
1,730 views
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;
0 answers
657 views
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,
1 answer
660 views
Carboxylic acids are stronger acids than alcohols
A. This is because the carboxy anion is delocalised. B. This is because the
0 answers
669 views
One characteristic of monomers that form addition polymers that is not common in monomers which form condensation polymers is:
a.
4 answers
1,766 views
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
1 answer
614 views
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
1 answer
1,087 views
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
1 answer
1,273 views
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 =
1 answer
485 views
In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong
0 answers
538 views
In the analysis of food, the nitrogen from the protein is sometimes converted into ammonia which is titrated against a strong
1 answer
532 views
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 ?
1 answer
1,025 views
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 ?
2 answers
748 views
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 answers
498 views
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
2 answers
936 views
calculate the concentration of sodium benzoate that must be present in a 2.0M solution of benzoic acid (C6H5COOH) to produce a
0 answers
821 views
Answers (8)
9/24+4/24=13/24 24/24-13/24=11/24
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
not sure if this is right but... do you just square root it twice- giving 4.304cm. then wourk out the area? I don't have the picture so i'm assumming its a cube/square.
i figured dH to = -664, the dS = -114. then i use equation> dG = dH -TdSand i got 333.08 kJ
gaby can you show me how you did this? i kept getting 333
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.
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.
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!
