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Ethan

Questions (221)

4.80 L of N2, at 25 ∘C and 1.22 atm , is mixed with 1.80 L of O2, at 25 ∘C and 0.122 atm , and the mixture allowed to react.
1. 1 answer
2. 485 views
prove that if the lengths of two sides of a and b, triangle are a and b respectively, then the lengths of the corresponding
1. 0 answers
2. 649 views
What type of water evaporates quicker:well water or salt river water?
1. 1 answer
2. 443 views
A 2.6 kg toy locomotive is pulling a 1.7 kg caboose. The frictional force of the track on the caboose is 0.52 N backward along
1. 1 answer
2. 797 views
A 20-kg child running at 1.4 m/s jumps onto a playground merry-go-round that has inertia 180 kg and radius 1.6 m. She is moving
1. 1 answer
2. 1,256 views
A train is traveling south at 23.5 m/s when the brakes are applied. It slows down with a constant rate to a speed of 5.01 m/s in
1. 4 answers
2. 679 views
Find the smallest positive integer n for which 126n cube root is a whole number
1. 1 answer
2. 814 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 491 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 468 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 429 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 4 answers
2. 461 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 510 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 423 views
Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered,
1. 1 answer
2. 412 views
If the volume of a balloon is 5.0 L at 22 degrees Celsius, what will be the new volume if the balloon is heated to 75 degrees
1. 1 answer
2. 589 views
This isn't quite an HW question, I'm needing any site that gives practice Free Response problems for equilibrium for AP
1. 1 answer
2. 765 views
Karl says that you can take the square root of each side of an equation. Therefore, he saysthat (x + 5)2 + ( y – 7)2 = 36 and
1. 1 answer
2. 522 views
At 20◦C the vapor pressure of pure methanol(CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol
1. 1 answer
2. 2,062 views
At 20◦C the vapor pressure of pure methanol(CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol
1. 3 answers
2. 882 views
Molybdenum (Mo) is a heavy metal that can have severe health effects on humans and animals. Tailings from a mining operation in
1. 3 answers
2. 589 views
What is the unit rate of ounces. A hint is 48 ounces cost costs 3.00 dollars. I divided 48 by three but and got 16 cents but
1. 1 answer
2. 501 views
1. Daniel wants to save at least 20 dollars by putting pennies in a jar daily. On first day, he puts one penny into the jar. The
1. 1 answer
2. 665 views
Hey Bob,What is the pH at the point during a titration when 20 mL of 0.200 M HCl has been added to 30 mL of 0.0500 M NH3
1. 2 answers
2. 842 views
Alright, this time, I know I have not mistyped my answer.Find the initial concentration of the weak acid or base in an aqueous
1. 2 answers
2. 571 views
Calculate the concentration of H3O+ present in 0.377 M H2CO3. Answer in units of mol/L I know the Ka of H2CO3 is 4.3E-7. But I
1. 4 answers
2. 845 views
What was the purpose of the Adams-Onis Treaty?Can some help me answer this question?? Ms. Sue??
1. 1 answer
2. 732 views
Calculate the pH of a 0.44 M aqueous solutionof NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the
1. 7 answers
2. 951 views
Calculate the pH of a 0.44 M aqueous solutionof NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the
1. 2 answers
2. 1,663 views
Calculate the entropy change when 4.88 g of H2 reacts with O2 according to thereaction 2H2(g) + O2(g)→2H2O(ℓ)at 298 K and 1
1. 1 answer
2. 696 views
What is the value of w (work) when 1.3 molesof H2 expands from 25 liters to 50 liters against a constant external pressure of 1
1. 1 answer
2. 886 views
Calculate the momentum of a 0.1 kg rifle bullet traveling 500 m/s. Answer in units of kg•m/s
1. 1 answer
2. 509 views
Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of
1. 1 answer
2. 656 views
In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y)
1. 3 answers
2. 2,150 views
A spherical oil tank with a radius of 10 feet is half full of oil that weighs 60 pounds per cubic foot. Its top is 6 feet
1. 1 answer
2. 569 views
A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the
1. 2 answers
2. 897 views
Can you help
1. 1 answer
2. 319 views
An object is dropped from rest.What is its instantaneous speed when it has been in motion for 7 s? The acceleration of gravity
1. 1 answer
2. 778 views
In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species from most to least: HClO, OCl,
1. 0 answers
2. 888 views
This is a projectile motion question.A ball with a mass of .4 kg, initially at rest is kicked directly toward a 3 meter fence
1. 1 answer
2. 644 views
graph each set of lines to form a triangle. find the area and perimeter.y=2, x=5 , and y=x Answer is Area = 4.5 units Perimeter
1. 1 answer
2. 1,611 views
At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally
1. 2 answers
2. 1,209 views
An external force F is holding a bob of mass 725 g in a stationary position. The angle that the massless rope makes with the
1. 3 answers
2. 994 views
Jim begins a job with a starting salary of 27000 dollars. she is guaranteed a raise of 4.75% each year. Sarah also starts a job
1. 2 answers
2. 618 views
Calculate the cell potential for this voltaic cell at 298K if it is constructed using solutions of .25M Ni(NO3)2 and .01M
1. 1 answer
2. 724 views
A voltaic cell utilizes the following reaction and operates at 298K3Ce{4+}(aq)+Cr(s)--->3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is
1. 1 answer
2. 3,143 views
A voltaic cell utilizes the following reaction and operates at 298K3Ce{4+}(aq)+Cr(s)--->3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is
1. 0 answers
2. 749 views
Consider the voltaic cellZn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s) {}=charge Under standard conditions, what is the maximum
1. 1 answer
2. 7,404 views
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to
1. 0 answers
2. 734 views
Complete and balance the following equation:Cr2O7{2-}(aq)+CH3OH(aq)-->HCO2H(aq)+Cr{3+}(aq) Any feedback would be great, thank
1. 1 answer
2. 1,085 views
A diver performing a double somersault spins at an angular speed of 4.5 π rad/s precisely 0.70s after leaving the platform.Assu
1. 1 answer
2. 1,593 views
A girl sitting on a merry-go-round movescounterclockwise through an arc length of 3.36m. If the girl’s angular displacement is
1. 1 answer
2. 1,436 views
A ﬁgure skater begins spinning counterclockwise at an angular speed of 4.6π rad/s. During a 4.6s interval, she slowly pulls
1. 1 answer
2. 1,736 views
The tension in a string from which a 5.4kg object is suspended in an elevator is equal to 53.02N. What is magnitude of the
1. 1 answer
2. 608 views
A 40.7kg wagon is towed up a hill inclined at 18.1 degrees with respect to the horizontal. The tow rope is parallel to the
1. 0 answers
2. 1,036 views
Karen has a mass of 62.60 kg and she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a
1. 1 answer
2. 1,010 views
An 845-N sled is pulled a distance of 190 m. The task requires 1.70 104 J of work and is done by pulling on a rope with a force
1. 1 answer
2. 566 views
Can you please give me a example of a - and + multi step equation
1. 0 answers
2. 385 views
When a particle is located a distance x meters from the origin, a force of cos(x/4) newtons acts on it. How much work W is done
1. 1 answer
2. 640 views
Need a lot of help!Specific gravity of a drug is 0.9815. How many cc of this drug should be administered for a dose of 215mg?
1. 4 answers
2. 443 views
In 69 games, a player blocks 234 shots, what is his blocks per ratio?
1. 1 answer
2. 395 views
The widths (in meters) of a kidney-shaped swimming pool were measured at 3-meter intervals as indicated in the figure. Use the
1. 1 answer
2. 2,485 views
Janice said that if you cut a cube into two parts you form 2 smaller cubes. Ling said that 2 rectangular prisms are formed. Who
1. 1 answer
2. 466 views
Expand [1+x^2(1+x)]^7 in ascending powers of x as the term in x^8.
1. 2 answers
2. 660 views
given the graph of f(x) = x sinx, 0<=x<=2piassuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
1. 1 answer
2. 454 views
given the graph of f(x) = x sinx, 0<=x<=2piassuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
1. 1 answer
2. 1,049 views
given the graph of f(x) = x sinx, 0<=x<=2piassuming that a quantity y changes at a rate of y' = xsinx, find by how much it will
1. 0 answers
2. 671 views
the measure of an angle is 7 less than 10 times its supplement
1. 2 answers
2. 782 views
350.ml of .25M KOH is reacted with 250.ml of .30M H3PO4. Determine which is the limiting reagent, the molarity of the salt
1. 1 answer
2. 659 views
insert grouping symbols into 2x3^3+4 to get it to equal 4374 and 279,936.
1. 1 answer
2. 422 views
lim sin2xx->0 ----- x How do I get rid of the x on the bottom in order to solve this problem? Thanks!
1. 1 answer
2. 466 views
Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).
1. 2 answers
2. 910 views
Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).
1. 1 answer
2. 387 views
what is the rule of a table with x numbers of 1, 4, 8, and 9 and y numbers of 5, 14, 26, and 29
1. 0 answers
2. 328 views
A chain is held on a frictionless table with 1/3 of its length hanging over the edge. If the chain has length L = 33 cm and mass
1. 3 answers
2. 1,113 views
I am a number between 20 and 30.When you put me into 6 equal groups,there is an even number in each group and 1 left over. i
1. 1 answer
2. 543 views
What would the functionH(x)=0.002x^2+0.005x-0.029 look like?
1. 2 answers
2. 488 views
H(x)= 0.002x^2+0.005x-0.029 where x is the speed of the car in miles per hour.How can I rewrite the function so that x represe
1. 0 answers
2. 422 views
H(x)= 0.002x^2+0.005x-0.029 where x is the speed of the car in miles per hour.How can I rewrite the function so that x represe
1. 0 answers
2. 1,181 views
What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show
1. 1 answer
2. 1,144 views
Only two horizontal forces act on a 9.1 kg body. One force is 5.3 N, acting due east, and the other is 1.6 N, acting 56° north
1. 1 answer
2. 624 views
If a - b = 2.4c, a + b = 5.8c, and c = 1.3i + 4.9j, then what are (a) the x component of a, (b) the y component of a, (c) the x
1. 1 answer
2. 382 views
If B is added to C = 6.5i + 4.6j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that
1. 1 answer
2. 614 views
take the first definition then double one letter to spell a wordExample Slang word for a police officer - cop A place wher
1. 2 answers
2. 487 views
I have to write an outline on The Sun Also Rises by Ernest Hemingway, and I can't seem to find an appropriate thesis statement
1. 1 answer
2. 591 views
If a ball is thrown in the air with a velocity 44 ft/s, its height in feet t seconds later is given by y = 44t - 16t2. (Round
1. 4 answers
2. 9,580 views
factor 7x+42
1. 1 answer
2. 336 views
factor 6x^2-1
1. 1 answer
2. 279 views
The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $410 to drive 300 mi
1. 2 answers
2. 1,113 views
An electron moving along the x axis has a position given by x = 14 te-t m, where t is in seconds. How far is the electron from
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2. 1,177 views
An electric vehicle starts from rest and accelerates at a rate of 2.3 m/s2 in a straight line until it reaches a speed of 17
1. 1 answer
2. 1,275 views
(a) If the position of a particle is given by x = 16t - 7t3, where t is in seconds and x is in meters, when is the particle's
1. 1 answer
2. 897 views
A car travels up a hill at a constant speed of 33 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the
1. 1 answer
2. 609 views
A startled armadillo leaps upward, rising 0.515 m in the first 0.203 s. (a) What is its initial speed as it leaves the ground?
1. 2 answers
2. 1,247 views
During a hard sneeze, your eyes might shut for 0.58 s. If you are driving a car at 92 km/h during such a sneeze, how far does
1. 2 answers
2. 821 views
A hot-air balloon is ascending at the rate of 13 m/s and is 62 m above the ground when a package is dropped over the side. (a)
1. 1 answer
2. 745 views
Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms
1. 3 answers
2. 1,518 views
A unit of area often used in measuring land areas is the hectare, defined as 104 m2. An open-pit coal mine consumes 99 hectares
1. 1 answer
2. 1,194 views
When an object is thrown into the air, relate it's mechanical energy to kinetic and gravitational energy.
1. 1 answer
2. 473 views
Describe situations where no work is done and situations where work would be done?
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2. 411 views
I need to draw a diagram showing delta, oxalate, tributary and meander.I also need to draw a diagram showing water table, zone
1. 0 answers
2. 638 views

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