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A peice of iron (mass=25.0 g) at 398 K is placed in a styrofoam coffee cup containing 25.0 mL of water at 298 K. Assuming that no heat is lost to the cup or the surroundings, what will the final tem
A 1600 kg car is traveling along a straight road at 20 m/s. Two seconds later its speed is 21 m/s. What is the magnitude of the net force acting on the car during this time?
The reaction of 0.779 g K with O<SUB>2</SUB> forms 1.417 g potassium superoxide, a substance used in self-contained breathing devices. Determine the formula for potassium superoxide.
A block with a mass m and charge q is placed in an electric field E = A i + B j where A and B are constants. If the block is released from rest at the origin at time t = 0, what are its (a) x, (b) y
A student doing an experiment was taking temperature, volume readings for determining ?Hvap. When the temperature of the water bath was 99 degrees C, the volumein the syringe was only 15mL.
A 370 mL soda can is 6.3 cm in diameter and has a mass of 21 g. Such a soda can half full of water is floating upright in water. What length of the can is above the water level?
One mole of an ideal gas does 2,600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm and volume of 28.0 L. (a) Determine the initial volume of the gas. Answer
The reaction 2A+3B=C is first order with respect to A and B. When the initial concentrations are A=1.6X10^-2 M and B= 2.4X10^-3 M. The rate is 4.1 X10^-4 M/s. Calculate the rate constant of the rea
Estimate the distance that the top lid of your eye moves during a blink. What is the acceleration of your eyelid? Assume it to be constant. What is your upper eyelid's final speed as it hits the bot
The woman runs at 3.95 m/s in a straight line. The dog is unleashed and runs back and forth at 5.40 m/s between his owner and the river, until she reaches the river. What is the total distance run b
Combustion of 1.96g of a compound containing only hydrogen and carbon produced 6.35g of CO2 and 2.25g of H2O. The molecular weight of the unknown hydrocarbon was determined by mass spectroscopy to b
Two blocks, with masses m1 = 4.6kg and m2 = 3.8 kg, are connected by a light spring on a horizontal frictionless table. At a certain instant, when m2 has an accelration a2 = 2.6 m/s squared, what is
This is a homework/discussion question. What are some particular details of how a nuclear power plant works as it relates to chemistry?
In a women's 100m race, accelerating uniformly, Laura takes 2.00 s and Healan 3.00 s to attain their maximum speeds, which they each maintain for the rest of the race. They cross the finish line si
An insulated container is used to hold 47.10 g of water at 26.10C. A sample of copper weighing 13.30g is placed in a dry test tube and heated for 30 minutes in a boiling water bath 100.10C'.
The engine is cut off when the lander is 5.0 m above the surface with a downward speed of 0.8 m/s. With the engine off, the lander is in free-fall. What is the speed of the lander just as it hits th
Three capacitors of capacitance 6, 6, and 4 µF respectively, are connected in series to a 2 V battery. What is the charge on the positive plate of the 6 µF capacitor?
A 1.00 L vessel at O C contains 0.19 mol H2, and 1.9 mol CH4. Calculate the pressure of gas mixtureand the partial pressure of each constituent gas in the mixture.
A balloon that has Fb =12N takes up a volume of 3.3L. What must the density of the air be for the ballon to float? what would the size of the ballon be if the envelope and basket weighs 8260 N?
Calcium reacts with vanadium (V) oxide according to the following equation. How many grams of calicum oxide can be formed if 2.000 g of calicum is mixed with 1.500g of vanadium (V) oxide?
A spectrophotometer was calibrated with a 6.1×10-4 M (in Cu) Cu-neocuproine solution. This calibration was carried out in a 1.00 cm cell, and yielded an absorbance of 0.235 AU. An unknown was
A mass M moves at speed V0 perpendicular to a dumbbell at rest on a frictionless horizontal table. The dumbbell consists of two masses m at the ends of a massless rod of length L.
What is the theoretical yield of C2H4O2? If only 28.8 g of aspirin are produced, what is the percent yield of the reaction? How much unreacted material remains after the reaction?
Q1. What is the width of a slit for which the distance between two first order minima is 1 cm? The slit is illuminated by a helium neon laser(wavelength=700nm). The distance between the slit and vie
1.994 g sample of ethanol, CH3CH2OH, is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 10.91 K.