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Two ice skaters stand together as illustrated in Fig. 3.26. They "push off" and travel directly away from each other, the boy with a velocity of 0.50 m/s. If the boy weighs 735 N and the girl 490 N, what is the girl's velocity after they push off? (Consider the ice to be frictionless.)
Examining the experimental setup, the students finds an air pocket between the stopper at one end of the U-tube and the electrolyte solution inside the tube
The mass flow of benzene in the top steam is 450kg(benzene/hour) and toluene in the bottom steam is 475kg(toluene/hour). State the material balance on benzene and toluene to compute the unknown components in the output stream.
When treated with Duquenois reagent, the extract of a suspect substance turned gray. How could you tell whether the substance contained marijuana, tobacco, or tea leaves ?
Depict the structures of the compounds as well as predict whether they can diffuse across a membrane without facilitated diffusion. Define why did you come to the conclusion.
The protein lysozyme unfolds at a transition temperature of 75.5°C and the standard enthalpy of transition is 509 kJ mol-1. Calculate the entropy of unfolding of lysozyme at 25.0°C
In older U.S. car total cylinder volume is expressed in cubic inches. compute the total cylinder volume in liters of a 454- cubic-inches engine.
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen cyanide.
Draw the major organic product(s) formed when hex-2-yne undergoes hydration in the presence of HgSO4 and H2SO4.
Question- A mixture of 1.374g of H2 and 70.31g of Br2 is heated in a 2.00L vessel at 700K. Calculate the equilibrium concentration of H2. Calculate the equilibrium concentration of Br2
Write a balanced net ionic equation to describe adding excess NH3 to a basic solution containing Ni2+. Write a balanced net ionic equation to describe the formation of a complex ion of aluminum in a basic solution.
In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed.
sodium hydrogen carbonate (NaHCO3) is mixed with 10.0 grams of sodium carbonate in enough de-ionized water to give a total volume of 250.0 ml. What is the pH of the resulting solution
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