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Questions (397)

Rxn 1: 4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g) If the equilibrium constant, Kc, for Rxn 1 is 0.0015,
1. 1 answer
2. 700 views
The story is "Trouble With Television"It has become fashionable to think that, like fast food, fast ideas are the way to get to
1. 1 answer
2. 967 views
How does the repetition in the preceding sentence convey the author's negative attitude toward television?I think it shows how
1. 2 answers
2. 1,092 views
"When before in human history has so humanity collectively surrendered so much of its leisure to one toy, one mass diversion?"
1. 3 answers
2. 1,090 views
why does chlorobenzoic acid have a lower freezing point than benzoic acid explain?would this have something to do with the
1. 1 answer
2. 592 views
What volume of 0.1244M hydrochloric acid is required to neutralize 24.81 ml of 0.1026M barium hydroxide?from the mole to mole
1. 1 answer
2. 521 views
How do i find the PH and pOH of 12.5ml of 15.8M HNO3 added to 400ml of 0.57M KOH
1. 1 answer
2. 675 views
Consider the reaction: 2H2+2NO->N2+2H2O. Initially 1.20mol of H2 and 0.95 mol of NO are placed in a container(all reactants and
1. 3 answers
2. 720 views
Solve: log(8y+12)=2
1. 1 answer
2. 382 views
1. Tiny Tim’s father, Bob Cratchit, works for Scrooge.What is the appositive in this sentence? Tiny Tim father Bob Cratchit
1. 20 answers
2. 4,722 views
If the percent yeild of the following equation is 55%, how many grams of H2SO4 are produced when 4.88 x 10^24 molecules of SO3
1. 1 answer
2. 536 views
How many grams of pure uranium can theoretically be extracted from a 10.0 kg sample of pitchblende, which is 92.0% UO2? Im not
1. 1 answer
2. 1,242 views
A Partially weather balloon has a volume of 195 L at a pressure of 0.993 atm. What will be the pressure in the balloon when it
1. 2 answers
2. 1,096 views
A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at
1. 3 answers
2. 824 views
A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist
1. 1 answer
2. 1,299 views
what is the most impressive example of anne's inner strength in act 2?
1. 1 answer
2. 1,057 views
He has narrowed the identity of hisunknown to either molecule X, molecule Y, or molecule Z. The Merck Index tells him that all
1. 1 answer
2. 685 views
Upon retirement (in 40 years) you want to receive $10,000 each month for a period of 28 years. This money resides in an account
1. 0 answers
2. 585 views
Show that the equation tanθ = sinθ can be written in the form sinθ(1 - 5cosθ) = 0?
1. 1 answer
2. 495 views
Solve 2cos^2(x) + 4sin(x)-3 = 0, giving all solutions in the interval 0 ≤ x ≤ 2π
1. 3 answers
2. 621 views
Given that 2cos^2 x - 3sin x -3 = 0, show that 2sin^2 x + 3sin x +1 = 0?Hence solve 2cos^2 x + 4sin x - 3 = 0, giving all
1. 2 answers
2. 1,019 views
A tennis ball is dropped from a height of 32 feet, rebounding to 1/2 its former height with each bounce. How far will the ball
1. 3 answers
2. 927 views
If a certain number is added to the numerator and denominator of 11/13, the result is 11/12. Find the number.
1. 1 answer
2. 3,361 views
A block of 3kg is pulled up a smooth slope with a force of 24N and the slope is of an angle 25 degrees. Calculate the
1. 1 answer
2. 548 views
A car traveling at a velocity of 2m/s undergoes an acceleration of 4.5m/s2 over a distance of 340m.How fast will it be going
1. 0 answers
2. 579 views
A car of mass 1300 kg is driving along a road at speed of 28m/s. As it approaches some traffic lights, the lights change to red
1. 1 answer
2. 986 views
A car of mass 1300 kg is driving along a road at speed of 28m/s. As it approaches some traffic lights, the lights change to red
1. 1 answer
2. 854 views
A man runs east 9.8 m/s for 11 s, stops for 6.9 s, then runs back (west) at 1.5 m/s for 1.2 s. What is the man's average
1. 1 answer
2. 528 views
A soccer ball is kicked with resultant velocity of 22.6 m/s at an angle of 60 degrees. What is the time to Apex, what is the
1. 1 answer
2. 454 views
The circumference of a rear wheel of a carriage is 50 inches more than a front wheel. If the rear wheel makes as many
1. 1 answer
2. 643 views
In a third game. Javier first two darts land in R what is the maximum possible score in this game
1. 1 answer
2. 421 views
According to the DPT of Health Services , 12% of 30-39 have depression. Suppose 3 30-39 year olds are selected randomly what is
1. 2 answers
2. 503 views
Find equations of the osculating circles of the ellipse 9x^2+4y^2=36 at the points (2,0)&(0,3).
1. 1 answer
2. 1,213 views
Find the curvature x=t^2, y=t^3Using k=|xÿ-yx|/(x^2+y^2)^3/2
1. 1 answer
2. 410 views
Given A=2i+3j and B=4i-jCompute for the following a. |a|+|b| b. 5A-6B c. |5A-6B| d. |5A|-|6B|
1. 1 answer
2. 354 views
Alice takes 4 hours to paint a wall. With sam's help, they can paint the wall in 3 hours. Without help, how long would it take
1. 2 answers
2. 488 views
Write an equation of the cosine function with the given amplitude, period, phase shift, and vertical shift.amplitude = 3, period
1. 2 answers
2. 2,968 views
Find tan theta if theta is an angle in standard position and the point with coordinates (â€“12, 5) lies on the terminal
1. 2 answers
2. 913 views
An equal amount of heat is transferred to two containers containing water at the same temperature. If thesecond container
1. 0 answers
2. 450 views
A liter of water is used to cool some electronics. If 1000 J of heat is given off by the electronics, by whattemperature does
1. 1 answer
2. 607 views
If f(x) and g(x) are two functions defined by f(x) = �ã(x + 1), g(x) = | x - 1 |, then what is the value of f(g(9))?
1. 2 answers
2. 770 views
. If i = ¡Ì-1, then (i + 1)(6i ¨C 10) is equivalent to?
1. 2 answers
2. 555 views
The function w(x) = -0.01x² + 0.27x + 8.60 can be used to estimate the number of self-employed workers in America in millions,
1. 1 answer
2. 1,247 views
The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base
1. 3 answers
2. 1,846 views
Seiji and Gavin both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. much
1. 3 answers
2. 2,090 views
A cannon is fired at 30 degrees above the horizontal with a velocity of 200 m/s from the edge of a 125 m high cliff. Calculate
1. 1 answer
2. 2,075 views
A 3kw engine operates for 3secs, 10kgf force is applied find the Displacement.
1. 0 answers
2. 458 views
Converging lens has focal lenght 8 cm , at what distance you will have to place the object in the following devices;1)
1. 0 answers
2. 548 views
A mass of 0.55 kg attached to a vertical spring stretches the spring 36 cm from its original equilibrium position.The
1. 1 answer
2. 11,777 views
Is the boiling point of 0.01 m potassium fluoride solution higher or lower than that of 0.01 m glucose solution? Explain
1. 2 answers
2. 1,490 views
The components of a traditional analysis model (data flow diagrams, process definitions, entity-relationship diagrams, and data
1. 0 answers
2. 571 views
This is the question that was asked:The components of a traditional analysis model (data flow diagrams, process definitions,
1. 0 answers
2. 652 views
A cannon fires a 0.598 kg shell with initial velocity 10 m/s in the direction 46◦ above the horizontal.The shell’s
1. 2 answers
2. 1,252 views
A 1.0-kg cart and a 0.50-kg cart sit at different positions on a low-friction track. You push on the 1.0-kg cart with a constant
1. 3 answers
2. 2,812 views
An aqueous solution of ammonium nitrite decomposes when heated to give off nitogen gas and water. This reaction can be used to
1. 1 answer
2. 705 views
An aqueous solution of ammonium nitrite decomposes when heated to give off nitrogen gas and water. This reaction can be used to
1. 0 answers
2. 865 views
Can someone help me with Chemistry Homework Due Tomorrow, Its about the Electrolysis of Hydrochloric Acid Practical we did and I
1. 1 answer
2. 558 views
The speed of light in a vacuum is 2.998 x 10^8 m/s. What is the speed of light in miles per hour?(1 km = 06214 miles)
1. 3 answers
2. 4,654 views
The hare and the tortoise are at the starting line together. When the gun goes off, the hare moves off at a constant speed of 10
1. 2 answers
2. 3,096 views
A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Ini- tially a car is 35 m behind the
1. 1 answer
2. 1,364 views
Due to continental drift, the North American and European continents are drifting apart at an average speed of about 3 cm per
1. 1 answer
2. 1,257 views
The ratio of the lengths of strings that play the notes D and B (on a guitar), is 27 to 16. If a string 64 cm long plays B, what
1. 1 answer
2. 2,202 views
Two objects with masses represented by m1 and m2 are moving such that their combined total momentum has a magnitude of 16.3 kg
1. 1 answer
2. 2,325 views
A physics book slides off a horizontal table top with a speed of 1.30 m/s . It strikes the floor after a time of 0.380s . Ignore
1. 2 answers
2. 2,803 views
A 1500-kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 13.0 m/s. The cars are stuck together. How fast
1. 1 answer
2. 693 views
debugging exercise:Private Sub btnItemNumber_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
1. 0 answers
2. 409 views
Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -3x2 + 5x + 8.
1. 1 answer
2. 541 views
Determine the Null and Alternative Hypothesis for the following:A.) A company manufactures flares, they select 100 at random to
1. 1 answer
2. 577 views
If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains?Carbon 12
1. 0 answers
2. 701 views
A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of
1. 1 answer
2. 1,089 views
9 less than the product of 7 squared and a number is 6
1. 1 answer
2. 411 views
Kylee bought a pack of 12 cookies. Two thirds of the cookies are peanut butter. How many cookies in the pack are peanut butter?
1. 2 answers
2. 525 views
Find the exact value of cos (2theta) given csc theta = 8/3 and 0 < theta < pi/2
1. 1 answer
2. 1,012 views
Use logarithmic differentiation to find the derivative of the following:y=x^x^2 x>0 Please show all steps so I can following for
1. 1 answer
2. 407 views
Use logarithmic differentiation to find the following derivativey=(x+6)^4/(x-5)^6. Please show all steps so I can follow for
1. 2 answers
2. 550 views
Find the derivative of the following:f(x)=ln(e^(2x)/(x^2-4)^3 Please show all steps so I can follow Thanks!
1. 3 answers
2. 448 views
Use logarithmic differentiation to find derivative of y=x^x^2 x > 0. Please show all steps so I can follow the steps. Thank
1. 1 answer
2. 612 views
1. You have a large wind tunnel of cross-sectional area 0.61[m2]. The wind speed is 4[ms-1]. Assume air density is 1 [kgm-3].
1. 0 answers
2. 568 views
What is the coeffecient of drag for the shape that has diameter 7.32[cm]? .Use three sig. figs. or N/A if there is not enough
1. 0 answers
2. 453 views
What effect on the molar mass of the unknown acid would each of the followinghave-that is-would it make the calculated molar
1. 1 answer
2. 1,469 views
a) Write Bronsted acid-base equilibrium equations for the following:b) Show the acid-base conjugated species, labeling all
1. 0 answers
2. 606 views
Write the conjugate base for each of the following:a. HPO4^-2 ____________________ b. H2O ____________________
1. 0 answers
2. 413 views
Write the conjugate acid for each of the following:a. HCO3^1- ____________________ b. H2O ____________________
1. 0 answers
2. 388 views
A 23.4 mL sample of 0.300 M trimethylamine, (CH3)3N, is titrated with 0.399 M perchloric acid.After adding 6.67 mL of perchloric
1. 1 answer
2. 972 views
H2C2O4.2H2O(s) is primary standard substance. 2.3688g of oxalic acid hydrate were completely neutralized by 42.56ml of NaOH
1. 2 answers
2. 4,396 views
What is the boiling point of a 25.20% (m/v) KNO3 solution ? (Kf of water = 1.860C/molal) (Kb of water = .52 0C/molal) (molar
1. 0 answers
2. 958 views
An aqueous solution containing 10.50 g of a compound in 100.0 ml of solution hasan osmotic pressure of 0.0187 atm. at 25°C.
1. 1 answer
2. 668 views
Determine the value of the equilibrium constant,Kgoal , for the reactionN2(g)+O2(g)+H2(g)<=> (1/2)N2H4(g) + NO2(g) Kgoal=? by
1. 2 answers
2. 3,503 views
1. Air flowing through a vent pipe of cross-sectional area 21[m^2] is traveling 0.89[ms^-1].What is the flowrate? [18.7 m3s-1]
1. 1 answer
2. 461 views
If I plant a 7 foot tall tree. The height (h) of the tree, in feet, after n years is given by the equation h + 4n + 7. In how
1. 1 answer
2. 584 views
My question is more conceptual. It is expressed in a series of two problems:What energy change occurs when 1.2 moles of methane
1. 2 answers
2. 615 views
When maternal oxygen istransferred to the fetus and fetal CO2 is passed back, how does this affect the maternal dissociation
1. 0 answers
2. 435 views
15.68squared
1. 3 answers
2. 332 views
find the molarity of 150. g H2SO4 solute dissolved into 900. g H2O solvent
1. 1 answer
2. 361 views
what determines the color of light when an electron moves from one level to another
1. 1 answer
2. 865 views
A gas occupies a volume of 502 cm3 at 20.0 C. What will be its volume at 106 C?I understand that it follows Charles' Law where
1. 1 answer
2. 571 views
A car is moving at 40 mi/h along a straight line when the driver sees a light turn red. She hits the brakes when she is 100 ft
1. 2 answers
2. 448 views
A wave described by y(x,t)=Asin(kx-wt) moves down a string. What is the maximum transverse speed an atom of the string can have?
1. 1 answer
2. 532 views
A horizontal wire is held taut by a mass M hanging from its end over a pulley. A harmonic wave of wavelength is produced on the
1. 1 answer
2. 573 views
The period of longitudinal sinusoidal wave is 0.16 seconds and its wavelength is 8.0 meters. Calculate the wave's speed,
1. 1 answer
2. 793 views

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