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Pretend you run a reaction and your theoretical yield is 5.25 grams, but you isolate 5.50 grams. What is the most likely reason for the excess weight
The hypotenuse of a right triangle measures 11.5. what are the lengths of the other two sides
A dockworker applies a constant horizontal force of 85.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. What is the mass of the block of ice
A heat engine with 0.500mol of a monatomic ideal gas initially fills a 1000cm^3 cylinder at 700K. How much work does this engine do per cycle
The following molecular equation represents the reaction that occurs when aqueous solutions of silver nitrate and calcium iodide are combined. 2 AgNO3(aq) + CaI2(aq) 2 AgI(s) + Ca(NO3)2(aq) Write th
She titrated the acid with a NaOH solution whose exact concentration was unknown. A volume of 18.19 mL of NaOH solution was required to reach the endpoint of the titration. What was the concentratio
Write the net ionic equation for the precipitation of chromium(III) hydroxide from aqueous solution
You are practicing throwing darts in your dorm. You stand 2.89 m from the wall on which the board hangs. Calculate the speed of the dart when it hits the board
An aqueous solution containing 5.85g of an optically pure compound was diluted to 800.0mL with water and placed in a polarimeter tube 10.0cm long. The measured rotation was -5.93degrees at 25degrees
two point charges, seperated by 1.5 cm have charge values of +2.0, What is the value of the mutual force between them
In a head-on collision, a car stops in 0.30{\rm s} from a speed of 30{\rm m}/{\rm s}. What force is applied to the driver by his seat belt during that fraction of a second
A 1.65kg chicken is blown into a wall by a strong gust of wind and held there. What is the minimum force of the gust of wind
For each of the following cases, identify the order with respect to the reactant, A. Case (A ----> product) 1. The half-life of A increases as the initial concentration of A decreases
Suppose that during the launch of a rocket from the surface of the earth, Determine the acceleration of the rocket
A proton with v = 374 m/s is moving through a region in which the magnetic field is B = 2.8 T. what angle does the protons velocity make with B
An engine is built to extract power from the temperature difference in the ocean. what is the maximum theoretical efficiency of such an engine
Suppose that you wish to fabricate a uniform wire out of 0.850 g of copper. Assume the wire has a resistance R = 0.800 ?, What will be the diameter of the wire
A 2500lb car collides with a 25,000 lb truck. What force is exerted on the car by the truck
If a pure R isomer has a specific rotation of -120.0 degrees, and a sample contains 81.0% of the R isomer and 19% of its enantiomer, what is the observed specific rotation of the mixture
A football player runs the pattern given in the drawing by the three displacement vectors A, B, and C. find the angle q that the resultant vector makes with the east direction
A 30 N block is pulled along a horizontal surface by a 10 N force parallel to the surface. evaluate the coeffient of kinetic friction
Now assume that you started with only 1.80 g of sodium benzoate. Assuming that the reaction proceeds to form benzoic acid, what would your theoretical yield be. Use two decimal places.
A block is on a rough horizontal surface. A horizontal force of 5N is applied to the block. What is the frictional force exerted on the block
When you bend your knee, the quadriceps muscle is stretched. What size force does the femur exerts on the kneecap if the tendons are oriented as in the figure and the tension in each tendon is 60 {\rm