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Demonstrating the low melting point of Gallium metal (29.8°C), an instructor removes a 1.00 kg sample of the metal from a container at room temperature (20.0°C) and places it onto the palm of his hand. Given the heat of fusion and specific heat of this metal is 80.18 kJ/kg and 373 J/kg°C, respectively, determine the amount of thermal energy absorbed by the sample before reaching thermal equilibrium with the instructor's hand (37.0°C). Assume the specific heat of gallium does not change from the solid state to the liquid state.
a compound is found to have a molar mass of 598 gmol. if 35.8 mg of the compound is dissolved in enough water to make
Metal carbonyls having formula M(CO)x , where x is the number of carbonyl units co-ordinate to metal M are formed by Fe, Cr and Ni. If effective atomic number of each metal is 36
the hexapeptide n-acetyl-ala-arg-phosphoser-cys-met-glu has pkas of 1.6 4.0 4.2 6.5 8.1 and 12.1. you will need to
Write an empirical formula for each of the following. (using the format CO2 for CO2.) (a) Ethylene glycol, car antifreeze, molecular formula C2H6O2
A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1 multiplied by 10-3 and Ka2 = 2.5 multiplied by 10-6. In order to make up a buffer solution of pH 5.80, which combination would you choose, NaHA/H2A or Na2A/NaHA?
Calcium carbonate reacts with hydrochloric acid to make calcium chloride and water and carbon dioxide. How many ml of carbon dioxide at 18 degrees Celsius and 715 mm Hg can be generated from 87 grams of calcium carbonate
What is the de Broglie wavelength in cm, of a 12.9 g hummingbird flying at 1.14 102 mph? (1 mile = 1.61 km.)
The same vessel was then tried and filled to the same mark with a solution at 4 degree Celsius .the vessel was now found to weight 20.33gm. What is density of the solution.
Why can NH3 function as a ligand with Ni^2+ While NH_4 + cannot function as a ligand with Ni^2+
Draw the structure of the product that is formed when 1-pentyne undergoes reaction with two equivalents of HCl.
Separation of acidic, basic & neutral substances in solution, Draw a flow sheet to show how you would separate the components of a mixture containing and acid substance
Carbohydrates, lipids, and proteins! Take a look around your home. Describe an example of a carbohydrate, lipid, and/or protein found in your home.
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