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The men's world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.800 miles? (1 mi = 1609 m.)
In the reaction of 1-chlorobutane with cyanide ion, the reaction rate is increased by the addition of a catalytic amount of sodium iodide. Explain this result.
If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 205-pound man?
A 36.0 mg sample of an organic compound (molar mass = 84.0 g/mol) is dissolved in 10.0 mL of water. This aqueous solution is extracted with 5.0 mL of hexane. Separation and analysis of the aqueous p
What is the coefficient of static friction between the crate and the floor? D.)Suppose you were performing the same experiment on this crate but were doing it on the moon instead, where the accelera
What is the emprical formulae of the compound whose composition by mass is 1.32g of carbon dioxide contain 0.36g of carbon
Cadmium metal is added to 0.350 L of an aqueous solution in which [Cr3+]=1.00M. What is the concentration of Cr2+ at equilibrium?
What is the composition of a vapor mixure (XA, XB) that boils at 90oC when the total pressure is 270 Torr (A=methylbenzene, B=1,2-dimethylbenzene)?
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.12°C to 29.85
An airplane flies 200 km due west from city A to city B and then 320 km in the direction of 32.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city
A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings
The ring is dropped into a graduated cylinder filled with water, and is found to displace 0.33 mL of liquid. If the density of 14 carat gold is 12.9 to 14.6 g/mL at 20oC, is the ring made of gold? E
A loudspeaker of mass 16.0 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 2.70 . What is the tension in each
Calculate the work of expansion in Joules accompanying the complete combustion of 1.0 g of sucrose to carbon dioxide and (a) liquid water, (b) water vapour at 20 degrees Celsius when the external pr
Calculate the fraction of atoms in a sample of argon gas at 458 K that have an energy of 11.9 kJ or greater.
silver has a density of 10.5 g cm3. a graduated cylinder contains 28.0 ml of water. what is the new water level after 35.6 g of silver metal is submerged in the water?
The muon, with mass m=209me, acts as a heavy electron. The muon can bind to a proton to form a muonic atom. Calculate the ionization energy of this atom, and calculate the radius of the muonic atom
A pipette is used to add 46 mL of 0.3 M Pb(NO3)2 to a 273.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8
The redox activity series lists reactions as. with lithium at the top and gold at the bottom. Which statement best describes the redox activity series?
what is the amount of energy involved in calories given off when 85g of water cools from 45 degrees celius to 25 degrees celius?
You are driving down the highway late one night at 20 m/s when a deer steps onto the road 35m in front of you. Your reaction time before stepping on the brakes is 0.50s , and the maximum deceleratio
During the production process, the production engineer determines the reaction quotient to be = 3.56×10-4. If = 6.02×10-2, what can be said about the reaction?
54 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altit
What is the boiling point of a solution produced by adding 630 of cane sugar (molar mass 342.3 ) to 1.1 of water? For each mole of nonvolatile solute, the boiling point of 1 of water is raised 0.51
At 25 °C and 775 Torr, carbon dioxide has a solubility of 0.0347 M in water. What is its solubility at 25 °C and 2010 Torr?