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If the bullet-block system compresses the spring by a maximum of 80.0 cm, what was the speed of the bullet at impact with the block?
The Henry's law constant for O2 in water at 25 °C is 1.66 ´ 10-6 M/mm Hg. What partial pressure of O2 is necessary to achieve an equilibrium concentration of 0.150 M O2?
An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?
Calculate its average speed. Calculate its average velocity for the entire trip, using "away from the trainer" as the positive direction.
On a hot summer day, a young girl swings on a rope above the local swimming hole. When she lets go of the rope her initial velocity is 2.25 m/s at an angle of 35 degrees above the horizontal. If she
HF(aq), and hydrocholoric acid, HCl (aq), are found in the lab. When tested, they both have a pH of 1. Which acid is more concentrated, HF or HCl?
What is the dominant intermolecular force or bond that must be overcome in converting CO2 from a liquid to a gas?
What is the mole fraction of 1.98 m Fe(NO3)3(aq)? The molar mass of Fe(NO3)3 is 241.9 g/mol and the molar mass of water is 18.02 g/mol.
A white solid precipitate forms. What happens to the mass of the mixture after the solid precipitate forms? Choose the best answer.
Condensation occurs on a bathroom window at a rate of 0.5kg per hour. If the bathroom air is at 26 Deg C and fully saturated with water vapour, calculate approx the rate of heat transfer on to the w
A 34 kg child sits in a swing supported by two chains, each 3.1 m long. If the tension in each chain at the lowest point is 283 N, find the child's speed at the lowest point.
What is the mole fraction of MgCl2 in a solution that is 11.04% by mass MgCl2(aq)? The molar mass of MgCl2 is 95.21 g/mol.
The dry solid weighs 0.397 g. Use this mass and dillution volumes to calculate the actual molarity of the sulfuric acid in the initial solution
What velocity would a proton need to circle Earth 1000 km above the magnetic equator, where Earth's magnetic field is directed horizontally north and has a magnitude of 4.00 10-8 T?
The specific heat capacity of silver is 0.235 J/g K. Its melting point is 962 C and its enthalpy of fusion is 11.3 kJ/mol. What quantity of heat in joules is required to change 5.00 g of silver from
A 2.52- sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess to yield 4.36 of and 0.892. Calculate the empirical formula of the compound.
A rocket of total mass 2630 kg is traveling in outer space with a velocity of 167 m/s. To alter its course by 38.0^circ, its rockets can be fired briefly in a direction perpendicular to its original
What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m.
Calculate the wall shear rate, which is defined as rw = Tw/mu, for each case. What is shear rate at the center line of each these blood vessels?
A 1.0 kg stone is being whirles at constant speed of 12 m/s in a circle, held on a frictionless surface by a steel wire which is horizontal. The wire is 4.0 m long and its radius is 1.0 mm. Find th
A rock is thrown vertically upward from ground level at time t = 0. At t = 1.76 s it passes the top of a tall tower, and 1.23 s later it reaches its maximum height. What is the height of the tower?
If the concentration of potassium chloride in water is 113 ppm, what is the molarity of potassium chloride in water? The molar mass of KCl is 74.55 g/mol. Assume the density of the solution is 1.00
A 29.0 kg child on a 1.00 m long swing is released from rest when the ropes of the swing make an angle of 27.0° with the vertical. Find the child's speed at the lowest position.
A flagpole of length 9 m and mass 35 kg is hinged at one end, where it is connected to a wall as sketched below. The pole is held up by a cable attached to the end. Find the tension in the cable. (A
At 25 °C, what is the osmotic pressure of 8.65 g urea (CON2H4) diluted with water to 1.50 L? (R = 0.08206 L·atm/mol·K)