Tuesday
September 30, 2014

Posts by frank


Total # Posts: 374

chemistry
Suppose 1.2x10^3 kg of C is mixed with 2.4x10^5g oxygen gas and carbon dioxide forms. 1. write the reaction and balance 2.which reactant is the limiting reagent and which reactant is in excess 3. How many grams of carbon dioxide will be formed.
September 27, 2014

chemistry
thank you, i forgot to convert the mols, once i put that part in. I got about the same thing as you
September 22, 2014

chemistry
A 2.556g sample of baking soda (NaHCO3)decomposes to produce 0.876g of solid sodium carbonate. Caculate the theoretical yield and the percent yield of the sodium carbonate. The equation is: 2NaHCO3(s) -> Na2CO3(s) + H2O + CO2(g)
September 22, 2014

chemistry
Calculate the number of moles of O atoms in a 2.5x10(-6)kg sample of C8H10N4O2
September 20, 2014

chemistry
thank you
September 20, 2014

chemistry
Calculate the number of C atoms in a .25mg sample of C8H10N4O2
September 20, 2014

chemistry
balanced equation =2 H(2)+ 1 O(2) -> 2H(2)O A. What mass of H2O would be produced from7.4 mg of O2 B. What is the volume of H2O would be produced from 7.4kg of O2. Density of water = 1.000g/ml
September 20, 2014

Economics
Country A is producing 4 units of X and 8 units of Y and country B is producing 4 units of X and 6 units of Y. The opportunity cost of producing more of A) good X is the same for both countries. B) good Y is the same for both countries. C) good X is lower in country A. D) good...
September 15, 2014

Physics
At some instant, a particle traveling in a horizontal circular path of radius 7.80 m has a total acceleration with a magnitude of 15.0 m/s2 and a constant tangential acceleration of 12.0 m/s2. Determine the speed of the particle at this instant(initial speed) and (1/8) ...
September 12, 2014

chemistry
You have a protein solution of 3.7mgs/ml You need to load 20ug onto a gel. How much of this solution would you use ?
August 27, 2014

chemistry
thanks that is exactly how the teacher gave us the questions
August 27, 2014

chemistry
How would I make 500 ml's of a .35M NaCI solution. MW= 58.44 ( I know how to do the first part) How many micromoles of NaCI would be present in that solution? What would be the percentage of NaCI in that solution?
August 27, 2014

Math
You ride your bike at an average speed of 8 miles per hour.how many miles can you travel in 1.5 hours?
August 17, 2014

statistics
Suppose a study is done in which several random samples of people from a population are taken and polled on the number of hours per night they sleep. It is determined that the sample proportion for those who sleep at least 8 hours a night is 36%, and the 95% confidence ...
July 19, 2014

math
Frank was a jacket that cost $60 ESA $43 what is the fraction of the amount that he that he needs to saved
June 3, 2014

Albebra
2 dice are rolled.What is the probability that neither both numbers are 2's or their sum is less than 6?
May 28, 2014

u.s. history
What was the prevailing economic challenge the United States faced at the start of World War II
May 14, 2014

English
Thank you very much. I still have these sentences I'm doubtful about. My doubt is whether I should use the present perfect or the simple past (considering that it is the end of the school year) 1) Exercises for literary text analyses aimed at developing lexicon have been ...
May 12, 2014

English
Can someone check the grammar in the following sentences? Thank you in advance. 1) The nuclear power station can give our town a lot of energy and jobs to people. 2) We won't be able to use the farmland near the power station because it will be polluted with chemicals. We ...
May 12, 2014

C++
The variables arr1 and arr2 have been declared as pointers to integers . An array of 10 elements has been allocated, its pointer assigned to arr1, and the elements initialized to some values . Allocate an array of 20 elements , assign its pointer to arr2, copy the 10 elements ...
March 16, 2014

Math
kim has 4/10 of a dollar. Carla has 40/100 of a dollar. Who has more money? Explain Colin has 3 quarters. He says he has less than 8/10 of a dollar. is he correct? Explain.
March 6, 2014

English
Can someone help me with these sentences? Which of them are grammatically correct? Thank you very much in advance. 1) They are not able to dance well. 2) They can't dance well 3) Are you able to play the piano? 4) Can you play the piano? 5) Were you able to find the book ...
February 27, 2014

English
Can someone explain to me the difference between angry about and angry for (when a verb follows)? I think "about" is used in sentences like: he is angry about being in jail (Would "for" be possible in this sentence?) he is angry with me for being rude to ...
February 24, 2014

English
Can someone check if the questions and the sentences are grammatical? Thank you. 1)Can you fly with a Bergonian passport? 2) Why might visitors not be welcome on Seeland? 3) What are the citizens of the Aerican Empire like? 4) What happened to Danny when he accepted his friend...
February 20, 2014

English
Yes, I wrote the sentences incorrectly: Thank you He was seen to watch the TV He is still dependent on ... but independent of.... I was so angry WITH him FOR behaving like that in front of everyone. (about behaving would be a mistake?) The teacher was annoyed WITH me FOR ...
February 15, 2014

English
Can someone check if the following prepositions/verbs are correct? Thanks 1) I couldn’t help CRYING 2) It’s no use EXPLAINING it to him; he won’t understand. 3) He was seen TO the watch. 4) I can’t afford TO BUY it. 5) Norma is anxious ABOUT making the ...
February 14, 2014

eNGLISH
Can you please tell me if the sentences are grammatically correct? e.g. "facing death" or the ability to face death Hamlet doubtful about the existence of an afterlife.
February 14, 2014

English
Can someone check these sentences, please? I thank you in advance. 1) Lady Macbeth "becomes sleepwalking" 2) Cowardice is the ability to bear the sorrows of our life and to stay alive, while courage is facing death by committing suicide 3) We can't be sure about ...
February 14, 2014

math
square root of [2+(square root of 1+k)]=square root of 5. Solve for k
February 5, 2014

math
square root of 2+(square root of 1+k)equals the square root of 5. Solve for k
February 5, 2014

algebra
square route of 2 plus the square route of 1 plus k = 2.24
February 5, 2014

English
Can someone please help me check the grammar in the following sentences? 1) I would like to inform people about the danger (after effects?) of having a nuclear power station near our town 2) I hope you will listen to our advice. 3) Animal and plant species will be in danger.
January 27, 2014

SAT prep help
If x^4=10, what it x^6?
January 25, 2014

English
Can someone of you check these sentences, please? Thank you in advance. 1Complete the sentences with the correct form of should, must or have to. 1You _________ be worried. This test is very easy. (don’t have) 2All the students _________arrive on time. (must) 3In my ...
January 24, 2014

English
Can someone check if the following questions are grammatically correct? Thank you. 1)Please Henry the VIII rule by focusing on the following: -Why he broke ties with the church -What the Act of Supremacy established -What political and social changes the reformation brought ...
January 20, 2014

English
Can someone tell me what's the British for the words "common trash barrels", "sorted trash", "regular kitchen" trash or food/garden waste? Thank you I'm quite environmentally friendly. I have three containers at home into which to sort my ...
January 14, 2014

English
Can someone help me with these sentences, please? Thank you very much in advance. I use the Internet to conduct school research, use translation programmes, use an online homework agency, do online shopping, play games, chat with my friends, send private instant messages, log ...
January 9, 2014

English
Can someone check these sentences, please? I need to prepare them for Tomorrow. 1) Air pollution is mainly caused by gases from factories and car exhaust fumes. It can cause acid rain, breathing problems and it can increase the risk of cancer. 2)The destruction of the ozone ...
January 8, 2014

English
Just one more thing. Which of the following sentences are grammatical? Thank you very much for your cooperation. 1.I spent most of my holiday at home. 2. I spent the greatest part of my holiday at home. 3. I mainly/mostly stayed at home during my holiday. 4.For the most part, ...
January 7, 2014

English
Are both skiing Holiday and ski Holiday possible? Thank you.
January 7, 2014

EARTH SCIENCE
the answer to 1 is not D!
January 7, 2014

English
Can you tell me if the expression the most part of my holiday is a mistake? I used it once instead of the greatest part of.. Thank you.
January 7, 2014

math
if 3a+3(b+1)=c, what is b+1 in terms of a and c?
December 21, 2013

English
I left out these last sentences. Thank you. 1) My parents like my clothes style very much and not They like so much my clothes style. 2) My favourite style is the urban look because it is comfortable enough for school. 3) Each of you will have to join one of the four groups ...
December 20, 2013

English
Can you please check these sentences I'm doubtful about? Thank you very much. 1) My parents like my clothing style because they think that wearing practical clothes is the most important thing/most important is to wear practical clothes/ 2) I was given these trousers for ...
December 20, 2013

English
Can you please check these sentences? Thank you very much in advance and Merry Christmas! 1) The Key-Note begins with an extended description of Coketown, the fictional setting for the novel, which is based on Preston, now part of greater Manchester, where Dickens went in 1953...
December 18, 2013

English
I still have a few doubts. Thank you very much. 1) When I go to a party, I generally wear clothes which are smarter than the ones I wear for school. 2) I want to be original and on fashion (is it possible?) 3) What do you think of/about this coat? Are both "about " ...
December 13, 2013

English
I urgently need your help with a few sentences. Can you tell me which alternatives are possible? 1) What do you think of/about these shoes? 2) AlL the ones I have been shown are uncool 3) all of the ones I have been shown... 4) He was given two weeks by the judge in which to ...
December 12, 2013

Math
A football arena measures 100ft. wide by 200ft long.The games are played on a similar rectangular field that's 150ft. long. What is the width of the football field? What is the perimeter of the football field?
November 10, 2013

Math
A faulty odometer (mile indicator) on a car registers 6 miles for every 5 miles travelled. A t the start of a journey it reads 500 miles and at the end of the journey it read 560 miles. What distance has actually been covered?
November 2, 2013

Math
The Japanese Nozomi averages 162 miles per hour. About how many miles would it take the Nozomi to travel 119 miles? Thanks, (If you could please show me how to do it)
October 27, 2013

Physics Classical Mechanics
Double star system answer - 9.859*10^17 seconds; keep on getting bungee jump wrong; I might be using the wrong equation. setting the equations to: 1/2*k*x^2=m*g*h; k = 2*m*g*h/x^2
October 21, 2013

physics
Use the answer from a (R) to calculate the escape velocity
October 19, 2013

physics
Geosynchronous Orbit Equation: R^3=(T^2)*(G)*(M_p)/(4)*(pi^2) Time is in seconds T=1.6 earth days=38.4hrs=13824seconds or 1.38*10^4 seconds this the equation i I used to get my answer. b)V-escape=sqrt(2)*(m_planet)*G/R to do b you need a to solve; do not forget to take cubed ...
October 19, 2013

physics
a. 1.29*10^8; b. 8.2547 km/sec
October 19, 2013

physics
8.01 homework. I have difficulty with question no. 2. all my equations do not work-Rough Surfaces. Also, the period of oscillation got part a the rest is confusing and my answers do not check out. I thought this was a very difficult assignment to say the least. So far, I am ...
October 16, 2013

chemistry
1129 nm
October 16, 2013

Biology
Father has red/green color blindness and is a hemophiliac. Mother is normal. Have two female children (Both are probably carriers). One female offspring marries a normal male. The question is what is the probability that their son is both color blind and hemophiliac? ...
October 14, 2013

Math
Lori's car gets about 28 miles per gallon of gas. About how many gallons of gas does Lori's car use for each mile driven? How do you know?
October 2, 2013

Chemistry
How many grams of sodium sulphate (mol. wt. 142) are required to make 1.2 liters of 0.5N solution
September 19, 2013

math
Dents and Dings Auto Body buys paint with a list price of $29,000. If the supplier extends trade discounts of 30/35/20, what is the trade discount amount?
August 25, 2013

science
How much hot air in SCFM is needed to heat up water from 60F to boiling point. The hot air is 350F.
July 17, 2013

physics
A fan blade is rotating with a constant angular acceleration of +8.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?
July 16, 2013

physics
A man is standing on a platform that is connected to a pulley arrangement, as the drawing shows. By pulling upward on the rope with a force the man can raise the platform and himself. The total mass of the man plus the platform is 94.7 kg. What pulling force should the man ...
June 30, 2013

math
i dont know it please teach me
June 26, 2013

math
i dont know it
June 26, 2013

Biology
Explain how life on earth is dependent on both polarity of covalent chemical bonds and hydrogen bonding.
June 7, 2013

physics
If the same shoe were dropped from a height of 40m, how many seconds would it take it to hit the floor?
June 4, 2013

physics
what will the volume of a gas at 309K if its volume at 215K is 3.42 L? Assume the pressure is constant
April 30, 2013

Life Orientation
Explain how drug addiction is a human factor that may cause ill health,accidents,crises or disaster
April 27, 2013

spanish
Thank you Ms. Sue!
April 25, 2013

spanish
My answer: Ellos irán a la playa
April 25, 2013

spanish
12. Tell what the following people will do tomorrow by changing the verb in the following statement to the future tense. Write the new verb in the blank. Ellos van a la playa.
April 25, 2013

Statistics
To get an A grade on the test, you need a total score of more than 16 points. One of the students knows the correct answer to 6 of the 20 questions. The rest she guesses at random by tossing a coin (one toss per question, as in 4B). What is the chance that she gets an A grade ...
April 20, 2013

Statistics
C(5,1)*(1/6)*(3/6)^4=0.05208333
April 20, 2013

english first additional language
yes
April 18, 2013

Physics
Four students measure the mass of an object, each using a different scale. They record their results as follows: Student A B C D Mass (g)49.06 49 50 49.1 E 49.061 Which student used the most precise scale?
March 2, 2013

Math
32
February 28, 2013

Math
The range of a set of data is 15, and the interquartile range of the same set is 12. Which of the following statements is true about the set? A) The two ranges are close together, so there is probably an outlier in this set B) The two ranges are close together, so there are ...
February 25, 2013

biochem
I'm stuck on this question, not sure where to start. can you show detail and explain so that it helps me to understand it. help please, thanks. The value of delta G for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is +4.4kj/mol. If the concentration of ...
February 9, 2013

math
Add 3 2/5 and 7 1/3
February 6, 2013

physics
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. What is the average speed and average velocity of the bicycle?
January 24, 2013

Math
On a Christmas package, Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in postage?
January 18, 2013

social studies
2013 social studies fair project: A turn in history Walt Disney Pre-Draft Please
January 13, 2013

Calc 1
integrate from 0 to pi/4 (sec^2x)/((1+7tanx)^2)^1/3 integrate form pi^2/36 to pi^2/4 (cos(x^1/2))/(xsin(x^1/2))^1/2 integrate from 0 to pi/3 (tanx)/(2secx)^1/2
November 30, 2012

Calc 1
integrate from 0 to pi/2 (3sinxcosx)/(1+3sin^2x)^1/2
November 30, 2012

SAT Essay
(Continued from part 1) It didn,t refer back to anything. You also need to explain WHAT CHANGES TOOK PLACE??? Here is another sentence that needs re working "Another example that portrays this idea was can be seen in "The Scarlet Letter" by Nathaniel Hawthorne...
November 29, 2012

SAT Essay
YOUR POINTS ARE FINE BUT THE ESSAY CAN DO WITH MORE ORGANIZATION;IT IS TOO "CHOPPY" BECAUSE YOU BOUNCE AROUND FROM ONE THING TO ANOTHER AND THEN BACK AND FORTH.iT IS DIFFICULT TO FOLLOW YOUR THOUGHTS. I suggest you rearrange the paragraphs by putting all the info of ...
November 29, 2012

English
your answers are correct but should Luis sentence be his dog? You have "hiss doing"
November 27, 2012

MATH 5TH GRADE
HOW MANY TIMES MORE IS 2000 THAN 20?
November 27, 2012

MATH
HOW MANY TIMES LESS IS 400 THAN 4 MILLION???
November 27, 2012

Math
the answer is 3!! DIVIDE 24 BY 8!
November 27, 2012

English
There are many ways to describe weather. If it is raining very hard, the idiom "It's raining cats and dogs is used. This is from ancient times when cats and dogs were on thatched roofs and would fall when the roof would collapse in heavy rain. Cats would get up and ...
November 27, 2012

math
how many times less is 400 than 4 million; explain
November 27, 2012

Accounting
The company’s fiscal year ends on December 31. Using the following information, compute depreciation for this machine for each of the 4 years using each of the following methods: Straight-line method Sum-of-years method Double-declining method Units-of-production Year ...
November 10, 2012

Accounting
ABC company purchased machine for $300,000 that had a useful life of 5 years, with a salvage value of $50,000 at the end its life. Depreciation was calculated over 2 years on straight-line basis. In 20X2, it determined that the total life should be 10 years with the salvage ...
November 10, 2012

Chemistry
Because we need to Cancel the mL and keep kj our main unit and the heat is released as a form of energy which is measured in Kj so basically u are multiplying these 2 numbers just for the sake of getting a pure q(calorimeter) in its energy form i.e Kj because ML is not an ...
October 15, 2012

math hw
286 + 93
October 14, 2012

math
261 miles in 29 minutes
September 23, 2012

Science
Noodles
September 19, 2012

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