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A piece of chocolate cake contains about 400 Calories. A nutritional Calorie is equal to 1000 calories (thermochemical calories), which is equal to 4.184 kJ. How many 9-inch-high steps must a 180 pound man climb to expend the 400 Cal from the piece of cake? Assume that the energy used to climb steps is the same as the energy required to lift a mass against the force of gravity, namely: PE = mgh, where m is the mass of the object lifted in kilograms, g is the gravitational constant (9.8 m/s2), and h is the height the object is lifted in meters.
What are the concentrations of each of the ions in a saturated solution of PbBr2, given the Ksp of PbBr2 is 2.1 x 10^-6?
Explain the type of nonrenewable energy resource used and their short-term and long-term effects on the environment
What is the final pressure in the bottle for a monatomic gas, for which CV,m = 3/2R, and a diatomic gas, for which CV,m = 5/2R?
You are about to perform a reaction that requires 1.25 mol of CaCl2 to go to completion. The solution available in the stock room has a concentration of 33 % w/v. How many mL of this solution will you need to use? A. 46 mL B. 420 mL C. 0.034 mL D...
A titration experiment requires 16.5 mL of 1.58 M HCl to reach the endpoint with 25 mL of LiOH. What is the molarity of the LiOH solution
For a hypothetical gas-phase reaction that is second order in A and third order in B, by what factor does the rate change if pA is decreased by 4 times and pB is doubled
Your are given a white substance that sublimes at 3000 degrees celsius, the solid is a non conductor of electricity and insoluble in water. What type of solid might this substance be? molecular, covalent-network, ionic, or metallic
Calculate the concentration of Cu^2+ in a solution prepared by adding 4.5*10^-3 mol of CuSO4 to 0.490 L of 0.37 M NH3.
an aqueous cacl2 solution has a vapor pressure of 81.1 mmhg at 50 c. the vapor pressure of pure water at this
Once the solvent front reaches the top of the chromatographic paper,solvent begins to evaporate from the top edge of the paper, and the remaining solvent continues to move up the paper.
If I have 2.4 moles of gas held at a temperature of 97 C and in a container with a volume of 45 liters, what is the pressure of the gas
you have two neutral solutions. one contains the indicator methyl red which turns red in strongly acidic aqueous
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