Saturday

May 30, 2015

May 30, 2015

Total # Posts: 80

**chemistry**

Hess¡¯ law says that when we add reactions together we can also add the enthalpies. Given the following set of reactions, use Hess¡¯ Law to calculate the enthalpy of the reaction given below. N2H4 + H2 ¡æ 2 NH3 ¥ÄH¡Æ = ? ...
*April 26, 2015*

**chemistry**

The following experimental data were obtained for the reaction; 2 NO + 2 H2 ¡æ N2+ 2 H2O Rate/10-5M/s [NO]/10-2M [H2]/10-2M 0.50 0.50 0.20 2.00 1.00 0.20 0.25 0.25 0.40 Write a rate law in agreement with the data. Rate = What is the value and units of the rate ...
*February 1, 2015*

**Math**

So -12 negative twelve plus 40 forty equals 28 twenty eight
*January 12, 2015*

**Math**

Well it says that the opposite of his age equals 40. The opposite of a number is its negative. That is how we get negative 12. When you add 40 to negative 12 you get 28 just like the problem says.
*January 12, 2015*

**Math**

-12+40=28 Get it?
*January 12, 2015*

**Math**

He is 12 years old
*January 12, 2015*

**english**

The first is (b)
*January 12, 2015*

**English**

Well I did read it. From these stories you don't get the exact answer. I just wanted a second opinion. : D
*January 12, 2015*

**English**

Which adjective best describes the community's attitude toward Mari Djata's inability to walk in Sundiata? A. fearful B. indifferent C. sympathetic D. mocking B?
*January 12, 2015*

**english**

The first one is (b) im not sure about the second
*January 12, 2015*

**physics**

a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the floor on the bag?
*November 30, 2014*

**physics**

a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the floor on the bag?
*November 29, 2014*

**chem**

Fe + O2--->Fe2O3 How many grams of iron are required to convert 80 mL of oxygen at STP?
*November 4, 2014*

**chem**

A 0.069 gram sample of a metal reacted with HCl and produced 45.31 mL of H 2 gas at 25¡ÆC and 1 atm pressure. The metal is known to react with HCl according to the following reaction, 2 M + 6 HCl > 2 MCl 3 + 3 H 2 What is the molar mass of the metal? Which metal...
*October 31, 2014*

**chemistry lab**

If a portion of your aspirin sample had broken down, how would that effect the total amount of base used? What would the effect be on the percentage of aspirin in your sample?
*October 25, 2014*

**physics**

If you wanted to make a barometer that had a column of liquid about 6 feet tall, what would the density of the liquid have to be? 1 meter = 3.28 ft 1 inch = 2.54 cm Density Hg = 13.6 g/mL 1atm = 760 torr
*October 12, 2014*

**chemistry**

If you wanted to make a barometer that had a column of liquid about 6 feet tall, what would the density of the liquid have to be? 1 meter = 3.28 ft 1 inch = 2.54 cm Density Hg = 13.6 g/mL 1atm = 760 torr
*October 12, 2014*

**Chemistry**

How much energy in kilojoules is released when 25.0 g of ethanol (C2H5OH) vapor at 93.0 C is cooled to -10 C? Ethanol has mp = -114.1 oC, bp = 78.3 oC, ΔHvap = 38.56 kJ/mol, and ΔHfus = 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K.mol) for the liquid and 65.6 J...
*September 7, 2014*

**Young Harris College**

How much energy is needed to heat 8.50 g of ice from -30.0 C to 70.0 C? The heat of fusion of water is 6.01 kJ/mol, and the molar heat capacity is 36.6 J/(mol.K) for ice and 75.3 J/(mol.K) for liquid water. I got 19.24kJ but it isn't correct!!
*September 7, 2014*

**Statistics - Please help**

stop cheating
*April 3, 2014*

**Math**

1000010101
*April 1, 2014*

**Probability**

1??? 2 2/72 3a 12/72 3b 1/4 3c 0 3d 42/72 4a 3 4b 61/9 5 3/2 6 173/47
*March 7, 2014*

**logic**

a team of Andres Bruno carlos Daniel and Esteban participated in a tennis doubles tournament so two of one team play against other two It is known that Andres participated in a game Bruno in 2 carlos in 2 Daniel in 3 and Esteban in 4 then the amount of matches of the team were...
*February 17, 2014*

**logic**

CLaudia has 4 task to do go to the market, study, clean , sport it is known - go to the market if study - study if she does not clean - if she does not clean then she goes to the market a 15% b 12% c 10% d 24%
*February 17, 2014*

**logic**

a survey of three marks of soda has -of 100 people 83 drinks at least 1 of 3 marks -54 just drink 1 -19 drinks 2 of 3 between the people the % that drink the 3 are a 15% b 12% c 10% d 24%
*February 17, 2014*

**logic**

100 days after a sunday will be a day a Sunday b Tuesday c thursday d monday
*February 17, 2014*

**logic**

In a soccer tournament between four teams A,B,C,D wich was free for all the scores were A 4 points B 4 points C 3 points D 1 point In this tournament the winner gets 2 points, the draw 1 point the looser 0. It is known that each team has a goal so. 1 The result bteween A and B...
*February 17, 2014*

**logic**

in a bike competition with 21 laps was observed that 13% quit before 5 laps, 17% quit later than 5 laps but less than 15, and the others 210 finished the competition the number of bikers that quit before the 5 lap were: a) 27 b) 39 c) 43 d) 56
*January 10, 2014*

**logic**

Camilo, Diego, Esteban transport on their bikes apples, the way was splitted in two parts to handle the weight. In the first step for each 6 apples that carries Camilo diego carries 5 Esteban 4, in the second step for each 2 apples tath carries Camilo, Diego carries the same ...
*January 10, 2014*

**logic**

the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...
*January 10, 2014*

**logic**

the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...
*January 10, 2014*

**classical mechanics**

A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 20.0 cm. The two vertical pipes are open at the top, and the difference in water level between them is 2.0 m. Find ...
*January 3, 2014*

**Logic**

Claudia has four home works to do, go to the market, study for the exam, clean the room, and practice sports, she knows that: -she goes to the market if she studies for the exam. -she studies for his exam if she does not clean his room -if she does not practice his sport then ...
*January 3, 2014*

**math**

i want to add 34+85% i tryed it and i got 62.9
*November 22, 2013*

**math**

its in percent (85%) i dont think it should be in decimal when i tryed it i got the answer as 28.9 tonnes
*November 22, 2013*

**math**

Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was 85% of last year’s footprint. If her carbon footprint this year is 34 tonnes,what was her carbon footprint last year? PLZ NEED HELP
*November 22, 2013*

**math**

Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine the dimensions of ...
*November 22, 2013*

**Physic**

HW3___1B ?
*May 7, 2013*

**chemistry**

a) option d
*April 10, 2013*

**Exam: 986109RR - CHOOSING YOUR BUSINESS**

1. a 2.c 3.a
*March 7, 2013*

**math**

cotx+tan2x=cotxsec2x prove
*February 14, 2013*

**Math**

i don't under stand the word math problem
*January 12, 2013*

**physics**

a pitching machine throws a baseball at a batter with an initial velocity of 22.0 m/s at an angle of 30 degrees to the horizontal. the ball is 1.60 m above the ground when it is pitched. a) if the batter hots the ball at the same height as it was launched how long is the ball ...
*October 4, 2012*

**physics**

A motorboat travels due north at a steady speed of 3.0 m/s through calm water in which there is no current. The boat then enters an area of water in which a steady current flows at 2.0 m/s in a southwest direction, as shown in the next picture. Both the engine power and the ...
*August 16, 2012*

**calculus(related rates)**

Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 6.5 meters. If the water level is rising ...
*May 5, 2012*

**math**

a drawing of a deck has a scale of 1 inch to 5 feet. the actual deck is 18 feet long.how long is the deck in the scale drawing?
*May 3, 2012*

**calculus**

the dimensions of a closed rectangular box are measured as 30 in, 40 in.. and 60 in.. with a maximum error of 0.2 in. in each measurement. use differentials to estimate the maximum error in calculating the volume of the box
*April 1, 2012*

**calculus**

find the approximate change in z when the point (x,y) changes from (1,1)to (1.01, 0.90) f(x,y) = xe^(-y) + ye^(-x)
*April 1, 2012*

**Chemistry**

If a 2.6 g of weak diprotic acid were dissolved in 100 mL of water and a 10 mL aliquot of this solution required 21.6 mL of 0.1 M NaOH to reach the first endpoint, what are the equivalent and formula weights of H2A? I think I first need to find the moles of NaOH. Then, by ...
*February 16, 2012*

**English**

Is it self plagerism if I take the same argument or main idea from a paper that I wrote last semester and use that same principle/argument/main idea/thesis in another paper for the next semester if it's is completely rewritten with different words and stuff but is trying ...
*December 27, 2011*

**Trigonometry**

this can't be sovled there are two variables and one equation
*December 27, 2011*

**Trigonometry**

this can't be solved there are two variables.
*December 27, 2011*

**garyson**

A person rides up a lift to a mountaintop, but the persons ears fail to pop –that is, the pressure of the inner ear does not equalize with the outside atmosphere. The radius of each ear drum is 0.40×10ˆ-2m. The pressure of the atmosphere drops from 1.010×...
*December 24, 2011*

**Computer Science (MATLAB)**

Given an arbitrary one dimensional vector v imputed by the user for example v='Helllllloooooo' or v='Helo' I was able to append empty characters onto any one dimensional vector that the user can enter so that way the total length of the vector is a multiple of ...
*November 14, 2011*

**Computer Science (MATLAB)**

I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...
*November 1, 2011*

**Computer Science (MATLAB)**

I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...
*November 1, 2011*

**Computer Science (MATLAB)**

Given a vector of values of zeros and ones such as [1 0 1 0 0 0 1 0] I'm asked to, given a probability provided by the user, use that probability to change the values in the vector using that probability. For example given the vector [0 1 0 0 0 1 0 0 0 1] and probability ....
*October 18, 2011*

**English**

Hi, I'm writing a paper for English and my professor crossed off the authors name in one of quotes for the citation of my rough draft as if it was suppose to be there. Something like xxxxxxxxxxxxxxxxxxxxxx (john 59) and she crossed off john as if I wasn't suppose to ...
*October 10, 2011*

**science**

the last question i do not get can one of y´all help me out lisa is working on a science project her task is to answer the question ¨does rogooti(which is a commerical hair product) affect the speed of hair growth control group: independent variable: dependent variable:
*September 1, 2011*

**science**

can you tell me a website on elements
*January 28, 2011*

**physics**

1) A simple harmonic motion is described by a = - 16x, where a is acceleration in m/s2 and x is displacement in m. What is the time period?
*January 25, 2011*

**science**

Can you give me awebsite about phase change?
*January 17, 2011*

**science**

thankyou
*January 15, 2011*

**science**

Can you give me a website about attoms
*January 15, 2011*

**science**

Where can I find some information about nourvis system and endocrine system?
*December 27, 2010*

**government**

how can I become active in politics that would help promote causes that you believe in.
*December 25, 2010*

**Normal distribution**

The breaking strength of cable is known to be normally distributtes with a mean of 4000 kg and a standard deviation of 25 kg.The manufacturer prefers that at least 95% of his product meet a strength requirement og 4050 kg.is that requirement being met?if not. by changing the ...
*December 22, 2010*

**social studies**

Where can I find some information about native americans
*December 12, 2010*

**9 th grade geomitry**

how do you do 19= n - 9 ??????
*September 9, 2010*

**math**

x=400*1/2y x+y=29600-2*y x--> Concord population y--> Euclid population solve for x
*September 7, 2010*

**Chemical Engineering**

How much acetone liquid (in mls) is required to produce a vapor concentration of 200 ppm (parts per million) by volume in a room of dimensions 3 x 4 x 10 meters? The temperature is 25oC and the pressure is 1 atm. The following physical property data are available for acetone: ...
*September 7, 2010*

**chemistry**

Molecular shape of BrF3 by VSEPR theory
*August 30, 2010*

**Science**

try yur best
*May 3, 2010*

**Perimeter**

Draw a figure with a perimeter of 24, using 11 squares
*April 18, 2010*

** Perimeter**

Draw a figure with a perimeter of 24 squares, using 21 squares
*April 18, 2010*

**7th grade english**

Is it possible to find a antonym for a noun
*December 29, 2009*

**physical science**

How much work is done by the gravitational force on an object of mass 9.40 kg that is initially at rest when it falls down for a time of 1.85 seconds. Ignore air resistance
*December 21, 2009*

**sociology**

How does conflict theory and functionalist theory apply to conditions and compensations of the workers in Barbara Ehrenreich's "Nickle and Dimed"?
*October 20, 2009*

**MassCommunication**

1.a 2.b 3.c 4.c 5.d
*June 5, 2009*

**Physics**

Where could i find the answer?
*October 10, 2008*

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