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4032 kJ of heat is released during the combustion of 88.0 grams of propane, C3H8 (44.0 g/mol). What would be the amount of heat released for the combustion of 0.500 moles of propane?
One liter of a buffer solution is prepared by dissolving 0.115 mol of NaNO2 and 0.070 mol of HCl in water. What is the pH of this solution? If the solution is diluted twofold with water, what is the
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you a
A 4.00 11.0 swimming pool slopes linearly from a 1.20 depth at one end to a 3.80 depth at the other. What is the mass of water in the pool?
A rifle with a barrel length of 61 cm fires a 12 g bullet with a horizontal speed of 440 m/s. The bullet strikes a block of wood and penetrates to a depth of 12 cm.
A compressed air tank carried by scuba divers has a volume of 7.0L and a pressure of 130 atm at 20C. What is the volume of air in the tank(in Liters) at STP?
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you an
A constant opposing pressure of 0.159 atm until it has a volume of 1.000 L at 200 K and the pressure equals the opposing pressure. What is the work for the system?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 80.6 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this
A 29.0 kg child on a 3.00 m long swing is released from rest when the ropes of the swing make an angle of 32.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest p
A speed skater moving across frictionless ice at 8.1 m/s hits a 5.7 m wide patch of rough ice. She slows steadily, then continues on at 5.8 m/s. What is her acceleration on the rough ice?
Draw a cartoon of how three water molecules might be arranged in space, given this electrostatic interaction.
Halley's Comet orbits the sun about every 75 years due to the gravitational force the sun provides. Compare the gravitational force between Halley's Comet and the sun when the comet is at aphelion (
A 12.8 g bullet is fired horizontally into a 102 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 47.4 mole% H2O. What is the mole percent of propane in the fuel?
48.0g piece of metal is dropped into 50.0mL of water in a graduated cylinder. The water level rises to 62.4mL. What is the density of the metal?
An object of length 3.00 cm is inside a plastic block with index of refraction 1.40. If the object is viewed through the top surface of the block at a non-zero angle from the normal, where is the o
Coils rotating in a magnetic field are often used to measure unknown magnetic fields. As an example, consider a coil of diameter 2.00 cm with 72.0 turns that is rotated about an axis perpendicular t
A motorist traveling at 13 m/s encounters a deer in the road 47 m ahead. If the maximum acceleration the vehicle's brakes are capable of is -6 m/s2, what is the maximum reaction time of the motorist
A 1.000 g sample of a compound containing C, H and O is burned in excess oxygen, producing 1.783 g CO2 and 0.734 g H2O. Determine the empirical formula of the compound.
A car is traveling 23 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. How many seconds after it is fired does it reach max height?
Throughout the problem, use = 8.85×10-12 .The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy of the capacitor at the moment
If the aluminum block is initially at 25 C, what is the final temperature of the block after the evaporation of the alcohol?