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A box is sliding up an incline that makes an angle of 17.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initi
Calculate the freezing point of a soution made by dissolving 3.50g of potassium chloride (M = 74.55 g/mol) in 100.0 g of water. Assume ideal behavior for the solution; Kf = 1.86 degrees C/m.
Describe the sign convention that is used when you do thermochemical calculations
What is the maximum speed with which a 1120 kg car can round a turn of radius 80 m on a flat road if the coefficient of static friction between tires and road is 0.80?
Discuss possible sources of error in the delta Hvap and delta Hfus portion of the experiment (heat of vaporization/fusion of water)and the effect these errors would have on the result,
An artillery shell is fired with an initial velocity of 300 m/s at 50.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 49.5 s after firing. What are the x and y comp
Write the names all possible dichloropropanes that could form from the chlorination of propane.
A fireman 54.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 36.0° above the horizontal. If the speed of the stream as it leaves the hose
Calcium hydroxide (which we made in Lab #3 last year) is used in industry as a cheap strong base. Calculate the solubility in water at 25 degrees C if the Ksp is recorded as: 6.5 x 10^-6. Give the
What is the speed of the truck in kilometers per hour at the end of this distance?
Obtain the phase angle between the current and the voltage across the resistor/capacitor combination.
Calculate the fraction of atoms in a sample of argon gas at 380. K that has an energy of 15.0 kJ or greater.
Find the total pressure for a mixture that contains four gases with partial pressures of 5.38 kPa, 4.52 kPa, 3.16 kPa, and 1.23 kPa.
A small ferry boat is 4.00 m wide and 6.00 m long. When a loaded box pulls onto it, the boat sinks an additional 4.00 cm into the river. What is the weight of the box?
Your groceries are carried in a bag with paper handles. The handles tear off if the force on them is greater thatn 51 N. What is the greatest mass of groceries that can be safely placed if the bag i
A 2.5-kg block slides down a 25 degree inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity reaches 0.65 m/s. The length of the incline is 1
What mass of oxygen is needed for the complete combustion of 1.90×10-3 g of methane
A person throws a stone straight upward at an initial speed of 15 m/s on a bridge that is 25m above the surface of the water. If the stone just misses the bridge on the way down, What is the speed o
A 2.0-m-long, 500g rope pulls a 10kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.0m/s^2. How much force pulls on the block of ice and how much force pulls on t
A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolec
A weak monoprotic acid is exactly neutralized by 11.17mL of a standardized 0.1455M NaOH solution. If the Ka of the acid is 0.00084, what is the pH at the half-equivalence point?
In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. What is the acceleration of the child and sled?
What mass of natural gas {rm{(CH}}_4 ) must you burn to emit 259 kJ of heat?
Write a balanced equation for the reaction of rm Ni(NO_3)_2 and NaOH. Express your answer as a chemical equation. Identify all of the phases in your answer. If there is no reaction, enter noreaction
The helicopter is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=56500N. The lift force L generated by the rotating blade makes an angle of 21.0 degrees w