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A drop of oil volume 0.05 cm3 is released from a medicine dropper on to a calm surface of a pond where it spreads out to cover an area of 40 cm2. Assume that the oil has a uniform thickness equal to the diameter of an oil molecule, calculate the diameter of an oil molecule, and express answer in scientific notation with the correct amount of significant figures.
determine the heat released when (ethene) CH2 CH2 reacts with hydrogen gas and form CH3CH3.If Bond enthalpies given are H H : 436 kJ/mol,C Br : 276 kJ/mol,C C : 612 kJ/mol,C C : 348 kJ/mol,C H : 412 kJ/mol;
Calculate how many moles of gas was in the bicycle tire when the total volume of gas collected is 5.60L{rm L} at a pressure of 765torr{rm torr} and a temperature of 25 °C^circ {rm C}.
What is the mass of sodium ion circulating in the blood if the concentration of sodium ion in this individual is 0.135M.The average adult has a total blood volume of 5 liter.
The air track carts in the figure are sliding to the right at 1.0 meter per second. Find the speed of the carts.
Determine hydroxyl and hydrogen ion concentration in this solution. (if Ka for ammonium ion = 5.0 x 10^-10.)
Determine What is the difference in energy between the ground and excited state if the absorption spectrum of rhodopsin is centered at roughly 500. nm.? what is the probability of rhodopsin populating the first excited state At a physiological tem..
Consider the following isomerization reactions of some simple sugars and values for their standard Gibbs free energy ΔG °:
By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment - determine theoretical and percent yields for this experiment.
Analysis of corrosion mechanisms and preventative measures
An equilibrium mixture of this reaction(NH4HS(s)?NH3(g)+H2S(g)) at a certain temperature was found to have [H2S]= 0.350M and [NH3]= 0.276M .What is the value of the equilibrium constant (Kc) at this temperature.
Determine the amount of heat energy is needed to raise the temperature of 0.362 kilograms of Cu from 23. Degree Celsius to 60 degree Celsius?
Determine what would you use to prepare 10 ml of 0.2M CaCl 2 from the 20M stock solution and find out which solution is with pH > 7, but is not an Arrhenius base in the strict sense?
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