If 6.57 g of iron are reacted with an excess of hydrochloric acid, HCI, then hydrogen gas and14.63 g of iron (III) chloride are obtained. calculate the theoretical yeild and percent of yeild of FeCl3.
February 7, 2012
Your cousin has just won the lottery and wants to create an account that will have $100,000 in 16 years to help pay for their child's college tuition. If the account has a fixed interest rate of 4.6% compounded 4 times each year, how much money should they put into the ...
December 10, 2011
An ideal gas is compressed at constant pressure to one-half its initial volume. If the pressure of the gas is 120 kPa, and 760 J of work is done on it, find the initial volume of the gas.
November 21, 2011
A window is made up of a circle embedded in a rectangle so that the diameter of the circle is a side of the rectangle. Find the demensions that will admit the most light if the perimeter ofthe window is 44 meters.
November 20, 2011
Suppose we want to charge a flask with 4.0 g of sugar. We put the empty flask on a balance and it is determined to weigh 190 g. Enter the weight we would expect to see on the balance when we're done adding the sugar.
September 27, 2011
every inch on a model is equivalent to 3.5 feet on the real boat. what would be the mathmatical rule to express the relationship between the length of the model, m, and the length of the boat, b?
August 16, 2011
Which equation can be used to find the unknow ange measures? The diagram is a triganle. A= x+30, B= 3x, and C = x-15 A 5x+15=90 B 5x+45-180 C 3x^3+15=180 D 5x+15=180 E 3x+30=180
July 19, 2011
A sample of gas occupies a volume of 500.0mL at .906 atm and 97 C. What will the final temperature (in Celsius) be if it is brought to a volume of 1.05L and a pressure of 502 mm Hg?
July 11, 2011
the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.
July 8, 2011
1. Neither (she, her) nor I will be at the assembly today. 2. To (whom, who) did you address that package? 3. Mrs Jamison and (he, him) were my favorite teachers last year. 4. (Who, Whom) remembered to bring a flashlight? 5. Did the club elect (her, she) president? 6. (He, Him...
April 12, 2011
What are parametric equations? How would you find the rectangular eq's when given parametric eq's? and how would you find parametric eq's when given rectangular eq's? for example, given x=cos4t and y=sin4t (t is between 0 and 2pi) what is the retangular ...
April 7, 2011
so the coefficient of a log function are the same as writing it as an exponent of x in the equation: log(subb)x = y ? therefore, Clog(subb)x = y is the same as log(subb)x^(C) = y ?
April 7, 2011
in my psychology textbook this is called the bystander effect with the answer choices you have i would say diffusion responsibility, but i am not sure. It is definitely not A though.
April 6, 2011
Early Childhood Education
A childs oral vocabulary is closely related to: A. his printing ability and scholarship. B. reading comprehension and ease in learning to read. C. creativity and motivation. D. attention span and distractibility. I think the answer is A
April 2, 2011
A block of mass m = 2.00 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 7.20 kg which is at rest on a horizontal surface Determine the speeds of the two blocks after the collision. lighter block = heavier block = what ...
March 24, 2011
After a completely inelastic collision between two objects of equal mass, each having initial speed v, the two move off together with speed v/6. What was the angle between their initial directions? if this is the equation 2mvcos(theta)=2mv/6 what numbers would replace m and v?
March 20, 2011
16_k=8 In the equation above, _ represents one of the operations of arithmetic: addition, subtraction, multiplication, or division. If k is a positive integer not equal to 8, what must be the value of k?
March 6, 2011
Barbara is playing a game. She jumps forward 5 feet, and then steps backward 2 feet. How many jumps will it take her to reach the finish line, which is 20 feet from where she started? Make a table to show Barbara's position. Barbara will reach 20 feet on jump number _____...
March 1, 2011
An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of mass m1 = 2.80 kg ...
February 27, 2011
Why does the division of zero equal one? I just do not understand the process. I've researched it and I have read the responses, but I do not understand them. Can Someone explain it further?
February 3, 2011
You serve a tennis ball from a height of 2.29 m above the ground. The ball leaves your racket with a speed of 18.7 m/s at an angle of 6.55° above the horizontal. The horizontal distance from the court's baseline to the net is 11.89 m, and the net is 1.07 m high. ...
January 30, 2011
In the shot put, the shot must land within a 40 degree sector. Consider a coordinate system where the vertex of the sector is at the origen, one side lies along the positive x-axis, and the units are meters. If a throw lands at the point with coordinates (16, 12), how far is ...
January 29, 2011
m= .025 kg initial velocity= 27 m/s time= 5.0*10^-4 final velocity= 10 m/s Force*time=mass( final vecolicy - negative initial velocity) F(5.0*10^-4)=(.025)(10-(-27)) F=(.025)(10-(-27))/(5.0*10^-4)
January 25, 2011
Math (please help!)
The largest Ferris Wheel in the world is the London Eye in England. The height (in metres) of a rider on the London Eye after t minutes can be described by the function h(t) = 67 sin[0.2094(t-30)] + 70 Using this equation i'm supposed to find the diameter, the maximum (top...
January 23, 2011
Based on an average cost per year to attend a university or college of your choice, how much should be invested each month to obtain the goal of that amount (the goal is 40,000$)? Assume 6%/a compounded monthly for 5 years. I don't need the answer, just the formula please!
January 20, 2011
A force of 100 Newtons acts upwards on a mass of 50 kg, another force of 60 newtons acts on the same mass downwards. calculate the accleration in which direction will be the accleration
January 16, 2011
solve the first equation for y. 5x-y=-1 subtract 5x from both sides -y=-1-5x divide by -1 y=1+5x now, plug this answer in for y in the second equation. 15x=2y 15x=2(1+5x) 15x=2+10x 5x=2 x=.4 plug this(x=.4) into the equation for y. y=1+5x y=1+5(.4) y=1+2 y=2 therefore, x=.4 ...
January 12, 2011
A tightly stretched "high wire" is 44 m long. It sags 3.8 m when a 56 kg tightrope walker stands at its center. What is the tension in the wire? 1 NIs it possible to increase the tension in the wire so that there is no sag? so far i know you do the inverse sin of (3....
January 9, 2011
A gas has a volume of 1,400 milliliters at a temperature of 20.0 K and a pressure of 101.3 kPa. What will be the volume when the temperature is changed to 40.0 K and the pressure is changed to 50.65 kPa?
December 14, 2010