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Christina

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Using G (measure of free energy) to determine wether the reaction 4Fe(s)+3O2(g)-> 2Fe2O3(s) is spontaneous at 25C, given that
1. 3 answers
2. 950 views
Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or
1. 0 answers
2. 596 views
Which of the following has the greatest entropy?A.1 mole NaCl (g) at 25C B.1 mole NaCl (g) at 50C C.1 mole NaCl (l) at 50C D.1
1. 1 answer
2. 1,455 views
an exothermic reaction involvesa. breaking weak bonds to form weak bonds. b. breaking weaker bonds to form stronger bonds c.
1. 2 answers
2. 1,167 views
True and False...1. A thermodynamically favorable reaction also proceeds spontaneously. I think that it is false? 2. Doubling
1. 1 answer
2. 739 views
Which of the following would have the lowest vapor pressure?A. 0.8 m C6H12O6 B. 0.10 m C6H12O6 C. 0.05 m C6H12O6 D. 0.15 m
1. 1 answer
2. 943 views
When one mole of LiBr is dissolved in 1 kg of H2O, the concentration of the Br- is1. 0.5 molal 2. 0.5 molar 3. 1.0 molal 4. 1.0
1. 3 answers
2. 452 views
Complete and balance the following equation?__P4O6+__H2O -> ___________
1. 2 answers
2. 544 views
Name the following compound?FeCl3 x 6H2O
1. 2 answers
2. 1,701 views
True or false?Hydrogen bonds between water molecules are comparable in strength to hydrogen-carbon covalent bonds?
1. 1 answer
2. 584 views
Calculate the amount of heat (in calories) required to raise the temperature of 200g of water from 20C to 50C. The specific heat
1. 4 answers
2. 4,483 views
In the second column, list at least three processes (capabilities) necessary to keep track of your home CD or DVD collection. In
1. 0 answers
2. 528 views
On a melting curve, the heat energy represented by the horizontal portion of the curve is called what?
1. 1 answer
2. 491 views
Are the melting point and freezing point of a substance represented by the same number?
1. 1 answer
2. 480 views
A 0.35 mol sample of an ideal gas is held in a vessel at 0.C and a pressure of 785 torr. What is the volume of the vessel?
1. 2 answers
2. 618 views
How many liters of hydrogen at STP can be produced by the reaction of 4.15 g of zinc with hydrochloric acid:Zn + 2HCl -> ZnCl2 +
1. 1 answer
2. 867 views
Another ionic and net ionic equation that i am having trouble with!!!I need the ionic and net ionic equation KOH+ HBr -> KBr+
1. 3 answers
2. 876 views
What is the ionic and net ionic equation?Ca(HO)2(aq)+ Na2CO3(aq)-> CaCO3 -> (s)+ 2NaOH (aq) I don't understand why there are two
1. 1 answer
2. 624 views
What is the ionic and net ionic equation for Na2CO3 + 2 HNO3 -> 2 NaNO3 + H2O + CO2 (g)This is what i have so far...
1. 3 answers
2. 10,790 views
Chlorine gas may be easily prepared in the lab according to the reaction:2KMnO4(s)+ 16HCl(aq)-> 2 MnCl2(aq)+5Cl2(g)+ 8H2O(l)+
1. 7 answers
2. 2,308 views
Some drain cleaners contain a mixture of sodium hydroxide and aluminum which reacts with water as follows:2Al(s)+2
1. 1 answer
2. 1,221 views
Mass balance on an intravenous injection (IV) bagA nurse sets up an IV drip for a patient consisting of normal saline; assume
1. 0 answers
2. 751 views
Make up a set of at least twelve numbers tahtn have the following landmarks. Maximum:8 Range:6 Mode:6 Median:5
1. 1 answer
2. 464 views
Electro-Rad Inc., a developer of radiology equipment, has stock outstanding as follows: 50,000 shares of 2%, preferred stock of
1. 0 answers
2. 830 views
how do you turn a decimal to fractions and percents?like .6 or .001 also how do you turn 2.85% into fraction and decimal?
1. 2 answers
2. 854 views
If you were to expend 10 Joules of work to push a 1-coulomb charge against an electric field, what would be its voltage with
1. 3 answers
2. 2,828 views
What is Scientific Principle?
1. 1 answer
2. 480 views
Of what value is knowledge of density to a chemist?
1. 3 answers
2. 737 views
How would I summarize this news article
1. 1 answer
2. 382 views
I'm curious about this question can someone please help me out.what is the unit measure of a button in mg?
1. 3 answers
2. 398 views
A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best
1. 1 answer
2. 1,287 views
HELP PLEASE!!Show that Euler’s formula holds for the polyhedra called a right pentagonal prism?
1. 1 answer
2. 520 views
I'm really stuck with this question can someone please help me.A bus is scheduled to stop at a certain bus stop every 45
1. 2 answers
2. 752 views
If L is the lenth of an arc, r is the radius and degree is the angle subtended by the arc, find the angle whenl=9.4cm r=4.5cm
1. 1 answer
2. 482 views
How does binomial monenclature relate to Genus and species? Also, what is the proper form for the scientific name of an
1. 1 answer
2. 528 views
how do you expand the power of a binomal in (x+3)^4
1. 0 answers
2. 339 views
how do you do permutations???distinguishable ex. Sweetwater would you put the total number of the letters on top and then put
1. 1 answer
2. 510 views
If P(a)=1/5, P(A and B)= 1/8, what is P(b/a)i don't get it is it the same way as finding p or b or is it something entirely
1. 3 answers
2. 334 views
IF P(A)=40%,P(A OR B)=60%,P(A AND B)=30% WHAT IS P(B)
1. 1 answer
2. 355 views
Okay i stuck on a problem can anyone help?There are 14 people total.7 are girls a day.Everyone has to work for 7 days also
1. 1 answer
2. 543 views
Identify and explain how the four steps to change the mental models/mindsets can help General Motors.The four steps are
1. 0 answers
2. 484 views
Hi can anybody help me with some websitesleading to interesting facts about mt everest. For example its history,the
1. 4 answers
2. 814 views
what number is 24% of 95.Sorry but i don't understand how to get numbers using percents. another problem im stuck with is what
1. 2 answers
2. 566 views
I am thinking of a number.It is a multiple of 3 but not 6.It is greater than 25^2 but less than 30^2.The units digit is a
1. 3 answers
2. 498 views
I need help factoring 64b^2-(q+r)^2
1. 1 answer
2. 985 views
what does this mean in english? and would it be true or false? sorry this is the only one i do not understand. unos temas
1. 2 answers
2. 681 views
solve 4x^2=12
1. 2 answers
2. 298 views
i have to mark on a map of ancient greece, where thera and thrace are can anyone help me or give me a site that would have good
1. 2 answers
2. 473 views
In this function, f(x)= [2/(x-3)]+1: I know it is a rational function and the graph moves 1 unit up and 3 units right. I also
1. 2 answers
2. 515 views
Background: A monochromatic laser is exciting hydrogen atoms from the n=2 to state to the n=5 state.Question: What is the
1. 1 answer
2. 1,235 views
QUESTION 1: Calculate the maximum increase in photon wavelength that can occur during Compton scattering.= ??? pm QUESTION 2:
1. 4 answers
2. 1,416 views
GIVEN: Two particles are created in a high-energy accelerator and move off in opposite directions. The speed of one particle, as
1. 1 answer
2. 557 views
A 22.8 kg turntable with a radius of 47 cmis covered with a uniform layer of dry ice that has a mass of 4.08 kg. The angular
1. 3 answers
2. 641 views
Given Information: Light of wavelength 631 nm passes through a diffraction grating having 485 lines/mm.Part A: What is the total
1. 2 answers
2. 3,518 views
Which of the following quadrilaterals must have diagonals that bisect each other?Rectangle Parallelogram Rhombus Isosceles
1. 3 answers
2. 4,273 views
How would I combine ions?like how would Sr be combined as a positve or negative ion? I DON'T GET IT!
1. 1 answer
2. 570 views
A rectangular swimming pool that is 12ft by 15 ft has a deck of uniform width built around it. If the area of the deck is 198
1. 2 answers
2. 797 views
The foot of a ladder is placed 6 feet from a wall. If the top of the ladder is 8 feet up on the wall, how long is the ladder?
1. 5 answers
2. 4,257 views
A rectangular swimming pool that is 12ft by 15 ft has a deck of uniform width built around it. If the area of the deck is 198
1. 0 answers
2. 926 views
The radius of a certain planet is 6.04x10^7 meters, and its mass is 5.19x10^26 kg. Find the density of this planet. (The volume
1. 1 answer
2. 727 views
You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the
1. 1 answer
2. 2,579 views
Oxygen (O2) has a molar mass of 32.0 g/mol [.032kg/mol].What is the root-mean-square speed of an oxygen molecule at a
1. 7 answers
2. 1,611 views
From a height of 35.0 m, a 1.25 kg bird dives (from rest) into a small fish tank containing 50.0 kg of water.What is the maximum
1. 2 answers
2. 859 views
From a height of 35.0 m, a 1.25 kg bird dives (from rest) into a small fish tank containing 50.0 kg of water.What is the maximum
1. 2 answers
2. 552 views
Europa, a satellite of Jupiter, appears to have an ocean beneath its icy surface. Proposals have been made to send a robotic
1. 1 answer
2. 1,457 views
If the force on the tympanic membrane (eardrum) increases by about 1.50 N above the force from atmospheric pressure, the
1. 0 answers
2. 744 views
At the time this problem was written, the price of gold was $427 per ounce, while that of platinum was $866 an ounce. The
1. 1 answer
2. 810 views
It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.20 m). As one goes deeper and
1. 1 answer
2. 2,065 views
In the Grimms' fairy tale Rapunzel, she lets down her golden hair to a length of 20.0 yards (we'll use 20.0 m, which is not much
1. 1 answer
2. 1,232 views
It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.20 GPa). As one goes deeper and
1. 0 answers
2. 698 views
The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. In extreme
1. 5 answers
2. 3,466 views
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis
1. 1 answer
2. 1,292 views
A small block on a frictionless horizontal surface has a mass of 2.50×10−2 Kg. It is attached to a massless cord passing
1. 3 answers
2. 3,146 views
what is the indirect object in this sentence "Chandler gave her the magazine"
1. 2 answers
2. 524 views
To strengthen his arm and chest muscles, an 83.0 kg athlete 2.00 m tall is doing a series of push-ups. His center of mass is
1. 2 answers
2. 1,362 views
Tidal Energy.If we model 2 blades as thin uniform steel bars 15.0m long and .25m in diameter, at what rate (radians/second and
1. 7 answers
2. 728 views
A CD rotates at 500 (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60
1. 1 answer
2. 1,943 views
3x+2y=6-6x-3y=-6
1. 1 answer
2. 380 views
This is so dumb, but what year did the Spanish America war begin?http://en.wikipedia.org/wiki/Spanish-American_War
1. 0 answers
2. 586 views
Whats the difference between a scientific theory and a regular theory?A theory may be about anything but a scientific theory is
1. 1 answer
2. 1,367 views
The MorTex Company assembles garments entirely by hand even though a textile machine exists which can assemble garments faster
1. 1 answer
2. 580 views
I need help with an assignment. I am asked to have someone fill out this worksheet. Can anyone Please help?Appendix D United
1. 0 answers
2. 575 views
Can anyone please read over my assignment and let me know if there are any grammar or spelling errors?CheckPoint: Modern
1. 6 answers
2. 802 views
Hello, I need help with this case please:All Star Cards and Bubble Gum Cards recently formed a New Company “Baseball Trading
1. 0 answers
2. 487 views
i need three more sentences using frothed please help!!! thanks so muchit means to bubble or foam. i figured out some sentences
1. 0 answers
2. 499 views
The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given
1. 0 answers
2. 1,243 views
Can anyone help me with my c++ program? Its a program I have to write using structs and arrays and i'm stuck. If anyone can help
1. 0 answers
2. 478 views
A buffer is prepared by mixing 110. mL of 0.442 M HCl and 0.545 L of 0.400 M sodium acetate. How many grams of KOH must be added
1. 0 answers
2. 717 views
Hey people! i really need some help here. im doing an assignment and i need info (sites) i need to no umm the average humidity,
1. 1 answer
2. 659 views
Can you define speed, motion, constant speed and average speed?And can you get me there formulas? Example-Distance over speed
1. 0 answers
2. 530 views
What is litum paper made of?If you cant find anything can you try to find some websites for me? THANKS A LOT!! 8-] litmus paper
1. 1 answer
2. 696 views
What is the formula for an oxide of fluorine?F2O2 also written as O2F2
1. 0 answers
2. 434 views
A 640 N student stands on a bathroom scale in an elebator. As the elevator starts moving, the scale reads 800 N. a) find the
1. 0 answers
2. 1,223 views
A light rope is attached to a block with a mass of 6 kg that rests on a horizontal, frictionless surface. THe horizontal rope
1. 0 answers
2. 1,246 views
Do orchestral musician learn each work just before it is performed and have only a little amount of time to practice?I believe
1. 0 answers
2. 417 views
Which wife is more virtuous to her husband Desdemona or Emilia in the play Othello? Please use examples from the play to
1. 0 answers
2. 517 views
An airplane is being floen at 1500km/h at 100m above level ground. The ground began to rise up at 10 degrees. How much time does
1. 0 answers
2. 537 views
A particle has a velocity of 18m/s at a certain time and 2.4s later is velocity is 30m/s in the opposite direction. What are the
1. 1 answer
2. 723 views

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