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An atom of mass 3.32*10^(-26)kg oscillates in one dimension at a frequency of 10^13Hz, calculate the quantized energy levels
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Ca
A fox is chasing a bunny. The bunny is initially hopping east at 5 m/s when it first sees the fox. What was the bunny's average acceleration during this half-second interval
a heavy box of school books (mass is 50kg) was set down at rest on an inclined street (theta = 30 degrees). Draw a force Diagram of the box
A 3.4-m-tall, 40-cm-diameter concrete column supports a 2.0×105kg load, By how much is the column compressed
a little girl and her father are both playing on a merry go round in the park. what is the average angular velocity of the father
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. how much ice needs
Why does fermentation preserve foods and why would a farmer purchase Rhizobium? Bacillus thuringiensis - most of the world's population relies on wheat for food.
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
You drop a 297-g silver figure of a polar bear into the 203-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 21.7°C. What is the final temperature of the water,
If the speed of a particle is increased by a factor of 10, by what factor is its momentum changed, By what factor is its kinetic energy changed
a satellite orbits the earth a distance of 1.50x10^7m above the planet's surface and takes 4.89 hours for each revolution about the earth. what is the acceleration of this satellite
A fishing line has attached to it a hollow plastic float 2.65 cm in diameter and having a mass of 1.50 g. Find the mass of a lead weight
A reaction has a rate constant of 1.27×10?4/s at 29 degrees C and 0.234/s at 79 degrees C. A) Determine the activation barrier for the reaction. B) What is the value of the rate constant at 15
A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. What is the Carnot coefficient of performance, KC, of the refrigerator
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute. - 1.30 L of a solution that is 18.0% Pb(NO3
A 25.0-mL aliquot of vinegar was diluted to 250 mL on a volumetric flask. Titration of 50.0-mL aliquots of the diluted solution required an average of 34.88 mL of 0.09600 M NaOH. Express the acidity
A small box of mass 10 kg is placed on top of a large box with a mass 4 times that of the small box. find the magnitude of the frictional force acting on the small box
Calculate the number of grams of Mg required if you need a molar equivalency of 1.25. Then calculate the amount of benzaldehyde (106.12 g/mol), benzophenone (182.22 g/mol), and methyl benzoate (136.
A compound is composed of elements C, H, and N. A 11.550-mg sample of the unknown compound was combusted, producing 31.332 mg of CO2 and 8.983 mg of H2O. What is the empirical formula for this compo
If 1800J of heat are added to a 190-g object, its temperature increases by 10o C. What is the heat capacity of this object
To determine the concentration of a solution of lactic acid a chemist titrates a 20.50 mL sample of it with 0.1010 M NaOH and finds that 10.76 mL of titrant are required to reach the equivalence poi
An electron and a proton are each accelerated through a potential dierence of 10.0 MV. Are the particles moving at relativistic speeds
Using 3.2 g bromobenzene. Calculate the number of grams of Mg required if you need a molar equivalency of 1.25. Then calculate the amount of benzaldehyde
What angular velocity would be required to give a rotating object of mass 25 kg and a radius of 2 m a centripetal force of 50 N