Mai
Most popular questions and responses by Mai
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?
asked on April 12, 2014 
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)
asked on October 20, 2010 
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?
asked on March 31, 2014 
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?
asked on April 7, 2014 
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
asked on January 28, 2014 
Math
Angie needs to have $15,000 at the end of 6 years. How much should she deposit weekly into an ordinary annuity if it earns 6.5% interest compounded weekly?
asked on April 22, 2014 
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= 3/2logk0.7 . How much longer does it take Mars than
asked on January 18, 2010 
Math
Angie needs to have an annuity payment of $1,300 at the end of each year for the next 10 years. How much should she deposit now at 10% interest compounded annually, to yield this payment?
asked on April 22, 2014 
Math
Young and Company owes bond holders $5,500 interest at the end of each quarter for the next five years. How much they deposit now at 8% interest compounded quarterly to yield an annuity payment of $5,500?
asked on April 22, 2014 
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.
asked on April 3, 2014 
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
asked on February 15, 2009 
Math
Chris and Carol just bought a $14,000 van and financed it for 5 years at 7% interest. What are the monthly payments?
asked on April 22, 2014 
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
asked on April 11, 2014 
MATH
1. a) On Wednesday, Harry sold 3 times as many candy bars as on Tuesday. On Thursday, he sold 5 times as many bars as on Wednesday. He sold a total of 152 candy bars. How many did he sell each day? b) Bill has 5 times as many baseball cards as Fred. Tim
asked on March 27, 2019 
math
Earl Watkins is ready to retired and has saved up $250,000 for that purpose. He places all of this money into an account which will pay him annual payments for 20 years. How large will these annual payments be if the account earns 17% compounded annually?
asked on April 22, 2014 
Math
Earl Watkins is ready to retire and has saved up $250,000 for that purpose. He places all of this money into an account which will pay him annual payments for 20 years. How large will these annual payments be if the account earns 17% compounded annually?
asked on April 23, 2014 
Algebra
Airplane A travels 1400 km at a certain speed. Plane B travels 1000 km at a speed 50 km /h faster than plane A in 3 hrs less time. Find the speed of each plane
asked on April 15, 2016 
Math
Andy needs to pay off a loan of $18,000 in 5 years. Find the amortization payment he would need to take each semimonthly pay period (twice a month) at 6% compounded bimonthly, in order to pay off the loan.
asked on April 22, 2014 
chemistry
what is the hybridization of each atom for hydrocyanic acid?
asked on March 29, 2014 
Math
Barbara invested $12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effect rate of this investment?
asked on April 17, 2014 
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,
asked on February 15, 2009 
Algebra
If an object is thrown downward with an initial velocity of v0, then the distance it travels is given by s=4.9t sqrt 2 +v v0t. An object is thrown downward from an airplane 100 m from the ground, with an initial velocity of 6 m/sec. How long does
asked on April 15, 2016 
Math
Tim deposits $10 every month into retirement account which averages 18% interest compounded monthly. How much will be in this account after 45 years? (The number of years from age 20 to 65).
asked on April 23, 2014 
Algebra
Two pipes are connected to the same tank. When working together, they can fill the tank in 12 hrs. The larger pipe, working alone, can fill the tank in 18 hrs less time than the smaller one. How long would the smaller one take, working
asked on April 15, 2016 
Math
Tim deposits $10 every month into a retirement account which averages 18% interest compounded monthly. How much will be in this account after 45 years? (The number of years form age 20 to 65))
asked on April 17, 2014 
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 onehalf. Write and solve an equation to determine how many of each color marble is in the
asked on March 29, 2011 
Math
Hi, what is the gradient of a line that has an angle of inclination of 75°? Any help appreciated
asked on August 14, 2010 
Math Need Help
The price of a pair of trousers was decreased by 22% at $30. What was the original price?
asked on July 27, 2016 
chemistry
We calculated that 30.0 grams of ice initially at 10.0 Celsius and it requires 23.1 kj of energy to bring it all the way to a boil. How much additional energy does it take to convert all of the water to steam at 100 degree Celsius? How does this compare
asked on May 4, 2014 
Math Need Help
The price of an item changed form $140 to $100. Then later the price increase again from $100 to $140. Which of the two changes was larger in percentage in term and how much percent?
asked on July 27, 2016 
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
asked on March 25, 2014 
Algebra
During the first part of a trip, a canoeist travels 28 miles at a certain speed. The canoeist travels 9 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 3 hrs. What was the speed on each part of the trip?
asked on April 15, 2016 
math
if a ball is selected at random from an urn containing two red balls, three white balls and five blue balls, what is the probability that it will be a white ball
asked on November 10, 2014 
Essay writing
how to narrow down a topic about the Egyptian Revolution of 25 January for an argumentative essay??
asked on June 11, 2011 
Biology
What is the number one birth defect in California?
asked on October 16, 2014 
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?
asked on October 10, 2011 
Algebra
Select the answer choice that most accurately evaluates whose equation is correct. Tania is partially correct. The amount of money Thu makes, y, is equal to the product of the number of jars he sells and 12, but she is correct that the booth fee is not a
asked on January 29, 2018 
math
Solution for 2/3x+x+90=180
asked on February 27, 2012 
Drama
can we consider breaking the glass menagerie twice in the play of " The Glass Menagerie" by Tennesse William a framing device??
asked on June 14, 2011 
Drama
what are the literay techniques found in a play, a novel, a short story or a poem ?
asked on June 14, 2011 
Calculus
Explain how you would use the power integration formula to integrate the function f(x) = (1/x^2)(1/x)+(1/4).
asked on May 22, 2011 
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
asked on February 2, 2011 
Math
What is the median of this set? {π, √25, 15%, √15, 10/4}
asked on March 29, 2011 
chemistry
Pasta packages often have different direction for cooking at high altitudes. a.) According to the directions, should you boil the pasta for a longer to shorter time? Why? b.) If the pasta water boils rapidly over mediumhigh heat, is there any reason to
asked on May 4, 2014 
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
asked on March 25, 2014 
English
"The boat is made of paper." Why is the made in the past tense in this sentence? What kind of grammar is this?
asked on June 8, 2011 
grammar
Is this sentence correct? She has never been missed her homework.
asked on May 17, 2010 
Ｓｔａｔｉｓｔｉｃｓ
You are playing a board game in which severity of a plenty is determined by rolling three dice and adding spots on the upface. The dice are all balanced so that each face is equally likely, and the three dice fall independently. If X1, X2, and X3 are the
asked on December 15, 2008 
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.
asked on November 5, 2007 
Algebra
Ericka had 7 jars of jelly, and each was 2/5 full. How much jelly did she have?
asked on August 30, 2016 
Critical Thinking
Conditional Proofs 1. P>Q 2. R>Q conclusion is (PvR)>Q
asked on December 2, 2015 
BIO HELP PLEASE!!!
if one person is infected and five successive handshakes follow, how many are infected?
asked on April 27, 2015 
BIO HELP PLEASE!!!
explain why lysogenic conversion poses a threat to human health
asked on April 16, 2015 
biology
what is one advantage of using e. coli to study bacterial growth rates?
asked on February 23, 2015 
microbiology
e. coli 0157 is a pathogen that cannot ferment sorbitol, a sugar alcohol, to acid whereas the E. coli in our GI tract, a member of the normal flora, can ferment sorbitol to acid. What media would you use to differentiate between these two E. coli strains?
asked on February 5, 2015 
Chemistry
A mixture consists of 0.52g of X, 0.77g of Y,and 1.11 g o fZ. What is the mass % of Z in the mixture?
asked on May 5, 2014 
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?
asked on April 12, 2014 
chemistry
what is z effective? Rb+ Al3+ Mg2+ Na+ out of this set which ion is the smallest? which is the largest?
asked on April 3, 2014 
write
my question is what obstacles do i have to overcome to succeed?
asked on June 8, 2012 
Language Art
I saw a young girl (stealing, stole, steal, steals) something from the shop. which answer should it be and why?
asked on June 5, 2011 
Math
Four candidates are running for president of the student council. three other candidates are running for vicepresident. how many different ways can the two offices be filled?
asked on April 19, 2011 
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
asked on March 28, 2011 
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 the following ratios for 2002 and 2003 a. earnings per share b. return on assets c.
asked on August 26, 2008 
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
asked on September 16, 2007 
Statistics
State the main points of the Central Limit Theorem for a mean.
asked on June 24, 2008 
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?
asked on April 12, 2014 
chemistry
How many different NO bond lengths would you expect to observe in the actual structure of NO3− and why?
asked on April 3, 2014 
chemistry
what is the lewis structure for Nbromosuccinimide?
asked on March 29, 2014 
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.
asked on October 29, 2008 
English Lit
What does "your soul is the whole world" mean?? I have to write a paragraph with an example but I have no idea what to write. Thanks in advance
asked on December 30, 2008

Accounting
423000
posted on April 27, 2018 
Math
60
posted on October 31, 2017 
Math
Mai is saving money to buy a game. So far she has saved $18 , which is twothirds of the total cost of the game. How much does the game cost?
posted on February 14, 2017 
chemistry
what about the delta H?
posted on April 12, 2014 
chemistry
its the ABn molecules, which is related to VSPER
posted on March 31, 2014 
chemistry
can you give me the website?
posted on March 29, 2014 
Chemistry
@DrBob222: what about the sodium phosphate?
posted on March 26, 2014 
Frenchhow to make accents
How do u do Mme in frenc? small letters
posted on January 29, 2013 
write
the question is what has changed now that you are in school? can you give me a idea how to write this question?
posted on June 8, 2012 
write
can you give me an idea how write?
posted on June 8, 2012 
math
i don't know if i can do it...
posted on March 29, 2011 
Math Help Gr12
opps, im sorry.. its suppose to be D = (3/2)logk  0.7
posted on January 18, 2010 
Advanced Functions math
The original question was what i needed to solve, but with the way i changed it, is it correct?
posted on January 18, 2010