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Ana

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Nitrogen gas has values of Cv and Cp of 20.8 and 29.1 J K-1 mol-1, respectively. When a certain amount of nitrogen is heated at
1. 1 answer
2. 701 views
Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic:N2H4(liquid) + O2(g)  N2(g) +
1. 2 answers
2. 2,026 views
Calculate delta E for a process in which 88.0 g of nitrous oxide gas (N2O) is cooled from 165 ˚C to 65 ˚C at a constant
1. 7 answers
2. 5,895 views
An electrochemical battery made from Sn and Cu electrodes under standard conditions shows aninitial voltage of V= 1.1 V. If the
1. 5 answers
2. 582 views
Use the following information to answer this question:Cu+(aq) + e- → Cu(s) E° = 0.521V Cu2+ (aq) + e- → Cu+ (aq) E° =
1. 2 answers
2. 624 views
In the following hypothetical reaction A + B → C + D, the equilibrium constant, Keq is less than 1.0 at25°C and decreases by
1. 3 answers
2. 2,343 views
The following reaction has a positive value of ΔG°.2H2O(g) → 2H2(g) + O2(g) Which of the following statements must be true?
1. 3 answers
2. 4,289 views
Consider a buffer made from 0.13 M sodium acetate and 0.10 M acetic acid in 1L. What amount of KOH must be added to cause an
1. 6 answers
2. 739 views
Ammonia is a weak base with a Kb of 1.8 x 10-5. A 100.0 mL sample of 0.13 M aqueous solution of ammonia (NH3) is mixed with 87
1. 1 answer
2. 849 views
How many mmol ( millimoles) of HCl must be added to 130.0 mL of a 0.40M solution of methyl amine (pKb = 3.36) to give a buffer
1. 5 answers
2. 1,536 views
Posted by Ana on Saturday, May 3, 2014 at 11:23am.A zinc-copper battery is constructed as follows (standard reduction potentials
1. 1 answer
2. 563 views
If a navigation error puts a plane 2 degrees off course, how far off course is the plane after flying 121 miles? Round to the
1. 2 answers
2. 875 views
A boat travels 74 miles on a course with direction 34 degrees and then changes its course to travel 58 miles at 53 degrees. How
1. 2 answers
2. 1,020 views
An airplane, after 1 hour in the air, arrives at a point 350 miles south of its departure point. There was a steady wind of
1. 1 answer
2. 769 views
Ammonium metavanadate reacts with sulfur dioxide in acidic solution as follows (hydrogen ions and H2O omitted):xVO3^–^ + ySO2
1. 2 answers
2. 5,800 views
Use the following information to answer this question:Cu+(aq) + e- → Cu(s) E° = 0.521V Cu2+ (aq) + e- → Cu+ (aq) E° =
1. 4 answers
2. 2,810 views
A zinc-copper battery is constructed as follows (standard reduction potentials given below):Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M)
1. 5 answers
2. 2,084 views
A zinc-copper battery is constructed as follows (standard reduction potentials given below):Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M)
1. 0 answers
2. 777 views
A fuel cell designed to react grain alcohol with oxygen has the following net reaction:C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
1. 0 answers
2. 1,028 views
A student attempted to synthesize malonic acid which has a molecular weight of 104g/mol by the same method used to synthesize
1. 4 answers
2. 1,030 views
The decomposition of HCO2H follows first-order kinetics.HCO2H(g) CO2(g) + H2(g) The half-life for the reaction at a certain
1. 2 answers
2. 2,031 views
The rate constant for a second order reaction has the value of 2.5 x 10–3 L·mol–1·s–1. If the initial concentration of
1. 4 answers
2. 606 views
Consider the kinetic data given in the table below for the first order reaction:What is the value of the activation energy?
1. 2 answers
2. 672 views
Consider the kinetic data given in the table below for the first order reaction:What is the value of the activation energy?
1. 1 answer
2. 476 views
Use synthetic division to determine which pair of integers provide both a lower and an upper bound for the zeros of f(x)=
1. 0 answers
2. 526 views
If Lori's neighbor gave her sixths eighths cup of milk, would she then have enough milk to make her 2 pancakes?
1. 1 answer
2. 554 views
if you throw a 0.2 kg ball straight up at 8 m/s how high will it go
1. 1 answer
2. 511 views
if an airplane is traveling at 550 km/h into a head wind with a velocity of 40km/h what is the airplanes velocity relative to
1. 1 answer
2. 511 views
If a motorboat travels 25km/h towards the sea, down a river whose velocity is 4km/h what is the boats velocity related to the
1. 1 answer
2. 1,204 views
How many copper atoms are in a pure copper statue with a mass of 139kg{\rm kg}
1. 2 answers
2. 1,373 views
Iron ores have different amounts of iron per kilogram of ore.Calculate the mass percent composition of iron for each iron ore:
1. 2 answers
2. 1,928 views
Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C{\rm C}, 37.51%\%;
1. 3 answers
2. 8,778 views
Suppose a manufacturer claims that each family-size bag of pretzels sold weighs 12 ounces on average with a standard deviation
1. 1 answer
2. 1,102 views
(a) What is the pH of a 6.1 ✕ 10-5 M Ca(OH)2 solution?(b) What is the H3O+ concentration of the solution? I already know the
1. 1 answer
2. 504 views
a. What is the pH of a 6.1 ✕ 10-5 M Ca(OH)2 solution?b. What is the H3O+ concentration of the solution? I just cant figure out
1. 3 answers
2. 446 views
A ball is dropped from 400 ft what is the height of the ball on the 6th bounce?1 bounce =280 ft 2 bounce= 196 ft 3 bounce =
1. 1 answer
2. 1,165 views
Please HELPType the word that the underlined phrase modifies or renames. Store the records OF PAYMENTS in the file cabinet.
1. 2 answers
2. 634 views
(1) 8/1 divided (-3 2/5) My answer is 68/1(2) 3 2/3 divided by -8 6/7 answer 682/21 3) 41/5 x -8/5 =32/25 Please I need help i'm
1. 1 answer
2. 427 views
The major reason for the predominance of the PCI bus in the latest models of PCs is thatA. the size and form factor make it easy
1. 0 answers
2. 500 views
If x over three minus y over two= negative three. Which statement best explains the value of y changes each time x is increased
1. 1 answer
2. 376 views
How is Earth like a system?
1. 1 answer
2. 317 views
A cooling tower for a nuclear reactor is to be constructed in the shape of a hyperboloid of one sheet. The diameter at the base
1. 0 answers
2. 1,183 views
A cooling tower for a nuclear reactor is to be constructed in the shape of a hyperboloid of one sheet. The diameter at the base
1. 2 answers
2. 1,864 views
18.5g Al is submerged in 20.2g of water with a total temperature of 27°C. How much energy in joules is absorbed by the Al if
1. 1 answer
2. 471 views
X Y0 23 2 27 2.3 29 4.1 32 5 35 What is the correlation for this data set? 10) Find the regression line for this data set.
1. 1 answer
2. 405 views
Evaluate the determinant of the matrix.[-4 5 6 0 4 4 -2 -5 4]
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2. 595 views
Find the values of the variables.[-12 -w^2] = [2k -81] [2f 3] [-4 3] Show your work?
1. 1 answer
2. 1,851 views
Find the sum[1 4] [0 0] [0 3] + [0 0] A - [1 4] [0 3] B - undefined C - [0 0] [0 0] D - [1 0] [4 3]
1. 1 answer
2. 1,361 views
How do you find the hours of daylight ?
1. 1 answer
2. 358 views
The Formula s= sqrt 30fd can be estimated the speed of s, in miles per hour that a car is traveling when it goes into a skid,
1. 5 answers
2. 4,686 views
In the xy-coordinate plane, the distznce between point B(15,7) and point A(x,15) is 17. What is one possible value of x?
1. 0 answers
2. 872 views
I'm trying to find information on does lung capacity depend on height
1. 1 answer
2. 1,017 views
I,m writing a paragraph about using resources responsibly.And I have to use three vocabulary words adverse,generate,apparatus.
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2. 498 views
write a paragraph about using resources responsibly using these three words:renewable,nonrenewable,generate.
1. 1 answer
2. 425 views
What are the duties of congressional committees?
1. 2 answers
2. 444 views
Identify checks and balances.
1. 3 answers
2. 379 views
Explain progressive and regressive taxes.
1. 5 answers
2. 402 views
Explain the social contract theory.
1. 1 answer
2. 612 views
Who works on the federal budget?
1. 1 answer
2. 327 views
List one of the unalienable rights.
1. 1 answer
2. 407 views
Describe the different types of primaries.
1. 1 answer
2. 452 views
How do the duties of the Lieutenant Governor compare to those of the vice president?
1. 1 answer
2. 1,335 views
Madison spent 5/8 of her savings on a microwave oven and a refridgerator. She used 4/7 of the amount she spent to buy the
1. 3 answers
2. 600 views
Jaden wants to cover the floor with square tiles the same size. The floo measures 315 inches by 108 inches. If she uses only
1. 10 answers
2. 2,401 views
At a festival, 2/7 of the number of girls was equal to 3/5 of the number of the boys. There were 165 fewer boys than girls, how
1. 5 answers
2. 1,109 views
Two 0.4 kg soccer balls collide elastically in a head-on collision. The first ball starts at rest, and the second ball has a
1. 1 answer
2. 4,987 views
3x2+x+2
1. 0 answers
2. 348 views
What is the volume in liters of 48.0 grams of oxygen gas at 0.0 C and a pressure of 760mm Hg?
1. 1 answer
2. 438 views
Simplify Complex fraction:(x-1) ----- (x-3) --------- 1 4 ---- - ---- x2-x-6 (x+2)
1. 1 answer
2. 1,051 views
(x-1)/(x-3)/1/x2-x-6-4/(x+2)
1. 0 answers
2. 239 views
Reduce the Rational expression to lowest terms:3x2-9x+6/10-5x
1. 1 answer
2. 481 views
A jar contains 2 red marbles,6 blue marbles,4 white marbles, and 12 black marbles. What is the ratio of white marbles to all
1. 3 answers
2. 1,424 views
Find the center and radius of the given circle.1. x^2 + y^2 + 10y + 21 = 0
1. 0 answers
2. 402 views
Energy Use Light Output35 2250 50 4000 70 5800 100 9500 150 16000 What is the quadratic model for the light output with respect
1. 0 answers
2. 362 views
Examine the table below as the spearation distance is doubled ow much does the electrostatic forces decrease?1 20.0 Cm 0.1280N 2
1. 0 answers
2. 327 views
I am doing a journal review paper for Psychology. What are the implications of this work (i.e. what light does it shed on the
1. 1 answer
2. 508 views
I am doing a journal review paper. What are the implications of this work (i.e. what light does it shed on the particular topic
1. 2 answers
2. 459 views
Cassandra has a square photo that has lengths of 4 inches. She cuts 5/8 inch off the top and 1/2 inch off the bottom. What is
1. 3 answers
2. 439 views
What are some examples of self-monitoring techniques?What are some examples of self-managing techniques? NOTE: I just need some
1. 1 answer
2. 517 views
What am I suppose write about when I am asked to describe my self-concept?Note: Do NOT just give a link to the definition. I
1. 3 answers
2. 429 views
B. Assume the child is 1.2 meters tall and casts a shadow of 6.4 meters. Determine the angle of the sun at that moment.
1. 1 answer
2. 499 views
how to simplify the following,please step by step56x^7+21x^4+63x^3
1. 1 answer
2. 423 views
4x+(-9+3x)=-5
1. 1 answer
2. 270 views
Juan had three pieces of stick. The longest one measured 64 cm and is twice as long as the other two pieces. Find the total
1. 1 answer
2. 395 views
What is the answer here? Find the sum of the biggest odd numbers formed by the digits 1 and 2 and the smallest even number
1. 1 answer
2. 517 views
30% of 59
1. 1 answer
2. 235 views
If you must stop your moving car in a hurry, should you slam on the brakes and lock them?
1. 0 answers
2. 375 views
Solve the equation (3^x)^2-12*3^x+27=0Simplify and write without negative exponents: 3^2(x^-2y^3)^3/4^1/2*x^-4cuberooty^2
1. 1 answer
2. 364 views
Write as a single logarithm of a single quantityln(3)+1/2ln(x+2)-4ln(1+sqrtx)
1. 3 answers
2. 594 views
aluminum has a density of 27g/cm3 if a chunk of aluminum with a mass of 16g is placed in a graduated cylinder partially filled
1. 1 answer
2. 755 views
If two number cubes are tossed, what is the probability of getting a sum that is less than 6, given that 1 number cube shows a 3
1. 2 answers
2. 1,924 views
In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced
1. 1 answer
2. 393 views
In Circuits lab, we had to construct different types of operational amplifiers. The inverting and summing amplifiers produced
1. 0 answers
2. 379 views
An aqueous solution contains 0.196 M hydrosulfuric acid and 0.190 M hydrochloric acid.Calculate the sulfide ion concentration in
1. 1 answer
2. 519 views
An aqueous solution contains 0.216 M ascorbic acid (H2C6H6O6) and 0.131 M hydrochloric acid.Calculate the ascorbate (C6H6O62-)
1. 1 answer
2. 1,192 views
A 933 kg block is pushed on the slope of a 20◦ frictionless inclined plane to give it an initial speed of 50 cm/s along the
1. 0 answers
2. 550 views
Your percent
1. 0 answers
2. 265 views
adam smith supported three different views of theory of value(are the followings correct, i will add them to my essay) 1. Labor
1. 1 answer
2. 1,085 views
How many iron atoms are in 0.32 mol of Fe2O3
1. 2 answers
2. 2,401 views
If cosecant of theta equals 3 and cosine of theta is less than zero, find sine of theta, cosine of theta, tangent of theta,
1. 1 answer
2. 1,133 views

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