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If you have a sample of 2.5 mol of Fe2(SO4)3, how many mol of sulfate ion do you have
A 17.0-g piece of Styrofoam carries a net charge of -0.75 µC and is suspended in equilibrium above the center of a large, compute the charge per unit area on the plastic sheet
Write balanced molecular equations, complete ionic equations, and net ionic equations for the following reactions. Write "NR" if there is no reaction. All reactants are aqueous solutions.
Identify which of the following are oxidation-reduction reactions, and if they are, identify the oxidizing agent, the reducing agent, the substance being oxidized, and the substance being reduced.
Alloxanic acid(C4H4N2O5,6.40g,),sodium alloxanate(5.46g) were dissolved in 250.0mL of water. Calculate moles of alloxanic acid dissolved.
At the end of 2009, global population was about 6.8 billion people. What mass of glucose in kg would be needed to provide 1200 Cal/person/day of nourishment to the global population for one year
Imagine that you have a 5.50 L gas tank and a 2.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")
A girl delivering newspapers covers her route by traveling 4.00 blocks west, 4.00 blocks north, and then 6.00 blocks east. What is the total distance she travels
The use of high salts, e.g. "salting out" is a common technique used during protein purification. Describe the chemical process underlying this method.
Lead has a latent heat of fusion of 2.32x10^4 J/kg, a specific heat of 128 J/(kg K), and a melting point of 228°C. determine velocity needed to achieve melting the bullet
Draw the biuret reaction (i.e. include a structure) with a peptide(s) of your choice. You may use R to denote the amino acid side chains
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. What is the change in length of the nail
A log floats in a river with 1/5 of its volume above the water. Density of water is 1000 kg/m, how much of the volume is now above the water
A bucket of mass 1.60 is whirled in a vertical circle of radius 1.45. Find the speed of the bucket
Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W, How far will the bird fly before feeding again
When light of frequency 2.32×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
Brewed coffee is often too hot to drink right away. You can cool it with an ice cube, but this dilutes it. what is the final temperature of the coffee
What is the solubility of CuCL in solution with 2.0 M NaCl. equilibrium constant for CuCL2- = 7.9 x 10^4
26g of copper pellets are removed from a 300 C oven and immediately dropped into 110mL of water at 25 C in an insulated cup
Ethanol (C2H5OH) can be used as a combustible fuel. If ethanol has a density of 0.789 g/cm^3, what volume (in mL) of ethanol is needed to produce 24.1 L of carbon dioxide gas through complete combus
A person with a weight of 280 lb stands on two feet wuth their weight equally distributed between the shoes, What is the pressure on each show independently
The water in a atank is at a gauge pressure of 190,000 Pa. what is the force on the bottom of the tank
A batted baseball leaves the bat at an angle of 33.0 above the horizontal, How high does the ball rise above the point where it struck the bat