Thursday
April 17, 2014

Posts by Mai


Total # Posts: 50

Chemistry
If 0.50L of gaseous CH4 is burned at STP, what volume of O2 is required for complete combustion? Methane burns in oxygen to produce CO2 and H2O CH4(g) + 2O2(g) --> 2H2O(l) + CO2(g) And what volume of CO2 is produced?

Chemistry
If a particular reaction evolves 192 kJ of heat while expanding from 1.00 L to 2.00 L at 125 atm of pressure, what is the overall energy change for the system?

chemistry
what about the delta H?

chemistry
If a particular reaction absorbs 252 kJ of heat while doing 105 kJ of work at constant pressure. What are the ΔE and ΔH for values for the reaction? Is the reaction endothermic or exothermic?

Finance
Joe and Sue invested $1500 at Bank America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their first investment added $500 and invested it at Bank Bravo, at 5% compounded quarterly. a. What is the value of this a...

Chemistry
A piece of metal weighing 5.10g at a temperature of 48.6 degree Celsius was placed in a calorimeter in 20.00 mL of water at 22.1 degree Celsius. The final equilibrium temperature was found to be 29.2 degree celsius. What is the specific heat of the metal?

chemistry
the lattice energy for MgCl2 is -2326 kj/mol, which is much higher than that for NaCl which has a lattice energy of -786 kj/mol. Why is this so? Give at least two contributing factors.

chemistry
what is z effective? Rb+ Al3+ Mg2+ Na+ out of this set which ion is the smallest? which is the largest?

chemistry
How many different N-O bond lengths would you expect to observe in the actual structure of NO3− and why?

chemistry
its the ABn molecules, which is related to VSPER

chemistry
what are the favored geometrical arrangements for abn molecules which the A atom has 2, 3, 4, 5 and 6 pairs of electrons in its valence shell?

chemistry
what is the hybridization of each atom for hydrocyanic acid?

chemistry
can you give me the website?

chemistry
what is the lewis structure for N-bromosuccinimide?

Chemistry
@DrBob222: what about the sodium phosphate?

Chemistry
Calcium can also be precipitated out of the solution by adding sodium phosphate (Na3PO4) to form solid calcium phosphate. A.) write a net ionic equation for this process B.)calculate the mass of this precipitate you would generate from treating 1.000 L of your unknown sample w...

chemistry
Based on your titration of the 150ppm standard solution of Ca2+ calculate the molarity of the EDTA solution we used, which is Ca2+ + EDTA4- ----> [CA(EDTA)]2-

Math
An air conditioning salesperson receives a base salary of $2850 per month plus a commission. The commission is 2% of the sales up to and including $25,000 for the month and 5% of the sales over $25,000 for the month. a. Write a piecewise function that relates the salesperson t...

write
the question is what has changed now that you are in school? can you give me a idea how to write this question?

write
can you give me an idea how write?

write
my question is what obstacles do i have to overcome to succeed?

math
Solution for 2/3x+x+90=180

Math
How do you do asymptoes or what ever you call them? and how do you do the equations for the different graphs for transformation?

Drama
can we consider breaking the glass menagerie twice in the play of " The Glass Menagerie" by Tennesse William a framing device??

Drama
what are the literay techniques found in a play, a novel, a short story or a poem ?

Essay writing
how to narrow down a topic about the Egyptian Revolution of 25 January for an argumentative essay??

English
"The boat is made of paper." Why is the made in the past tense in this sentence? What kind of grammar is this?

Language Art
I saw a young girl (stealing, stole, steal, steals) something from the shop. which answer should it be and why?

Calculus
Explain how you would use the power integration formula to integrate the function f(x) = (1/x^2)-(1/x)+(1/4).

Math
Four candidates are running for president of the student council. three other candidates are running for vice-president. how many different ways can the two offices be filled?

math
i don't know if i can do it...

math
There are fifty marbles in a sack: red, blue and green. There are ten more green than blue marbles in the sack. The probability of drawing a red or blue marble is one-half. Write and solve an equation to determine how many of each color marble is in the sack

Math
What is the median of this set? {π, √25, 15%, √15, 10/4}

Math
The mean weight of 75 2nd graders is 55.7 lbs and the mean weight of 25 1st graders is 42.6 lb. What is the mean weight of the 100 children

English
whathappens to derek and roy's vow not to speak to bolivia?what do they learn from what happened?inthe story hot and cold summer

Chemistry
Calculate q when 0.10 g of ice is cooled from 10 degrees C to -75 degrees C (C ice= 2.087 J/ g* K)

Math
Hi, what is the gradient of a line that has an angle of inclination of 75°? Any help appreciated

grammar
Is this sentence correct? She has never been missed her homework.

Math Help- Gr12
opps, im sorry.. its suppose to be D = (3/2)logk - 0.7

Math Help- Gr12
The relation between the # of time in days, D, it takes for a planet to revolve around the Sun is related to the planer's average distance from the Sun, k, in millions of kilometres is defined by log D= 3/2logk-0.7 . How much longer does it take Mars than Venus to orbit th...

Advanced Functions math
The original question was what i needed to solve, but with the way i changed it, is it correct?

college: Chemistry
I need help on this homework problem and I do not understand how to work on it. Please help me with this problem. The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function e...

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 t...

microbiology
Can someone help me to answer this question please. What is the sequence of the last anticodon? What is its corresponding codon in the nontemplate strand of DNA including polarity.

accountiing
using the financial statements of landry's restaurant located in appendix a of the text fundamentals of financial accounting 1st ed by phillips libby and libby compute teh following ratios for 2002 and 2003 a. earnings per share b. return on assets c. current ratio d. time...

Statistics
State the main points of the Central Limit Theorem for a mean.

French-how to make accents
How do u do Mme in frenc? small letters

French-how to make accents
How do u do Mme in frenc? small letters

Biology
Compare the functions of a normal cell and that of a cancer cell with regards to cell division. Discuss the cell cycle control system and checkpoints and how these might be altered in a cancer cell.

Algebra
There are two questions that I am having trouble with one says Emily wants 400 ml of a solution that is 11% HC1. If she has only 8% HC1 and 16% HC1, how much of each should she use? and On a trip, Debbie spent as much time on the train as she id on the bus. THe train averaged ...

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