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A billiard ball moving at 5.00m/s strikes a stationary ball of the same mass. After the collisions, the fist ball moves at 4.33m/s and at an angle of 30.0 degree with respect to the original line o
A buffer consisting of equal amounts of a weak acid and its conjugate base has a pH of 4.4. A small amount of NaOH was added to this buffer solution. How will this affect the pH of the buffer?
When you exercise, lactic acid, CH3CH(OH)COOH, is produced as a product of metabolism. The lactic acid enters the bloodstream. explain how the buffer acts to neutralize the lactic acid.
An ocean liner leaves New York City and travels 19.2 ° north of east for 186 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the shi
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force must you exert to keep the pole motionless in a horizontal position?
A 3.00 x 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.00 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 x
Calculate the force of gravity between a human child (mass = 32 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m).
H2CO3, to carbon dioxide, CO2, and water, H2O. explain why breathing faster helps to eliminate excess lactic acid when you exercise.
Complete combustion to form carbon dioxide and water requires 1.120mol of oxygen. Calculate the mass percent of ethane in the original mixture.
A car is driven around a curve with a radius of 0.320 km and the car has a speed of 28 m/s. What is the centripetal acceleration?
A submarine dives 100.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of the submarine's displacement? (Assume that upward and the direction of the
A rate law and activation energy. Describe the chemistry that was occurring in the experiment between the time when solution A and B were mixed.
A 5 kg steel ball strikes a wall with a speed of 10.7 m/s at an angle of 59° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.151 s,
A 63 kg boy and a 47 kg girl use an elastic rope while engaged in a tug-of-war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the acceleration of
Historically, the solid residue that is left after the methylene chloride solution is evaporated has a lower melting point that its literature value, due to impurities. Explain what impurities are
A girl on a sled coasts down a hill. Her speed is 7.6 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.040,
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, what would be the recoil speed of the thorium nucleus?
What is the equilibrium partial pressure of SO3 in the mixture? At 900 K the following reaction has Kp=0.345:
Which electron transition requires the greatest amount of energy to be absorbed by a hydrogen atom n=1 to n=2 or n=3 to n=9 shouldnt it be n=3 to n=9 as it involves more shells.
(a) what is velocity of the two objects after collision? (b) How much kinetic energy is transferred to object B during the collision?
It has been suggested that rotating cylinders about 8mi long and 6.1mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripital accel
10 mL of 18 M sulfuric acid are added to 200 grams of water. A modest exothermic process occurs causing the temperature of the water to increase by 5.2°C. What is the molar enthalpy for the proc
How much work can be performed by an ideal Carnot heat engine that is driven by heat released upon condensation of 30 L of water vapor at 373 K and P = 1 bar?
How long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
When a 5.00-g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 6.225 kJ·K-1, the temperature decreases by 0.200 K.