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A 35g copper cup contains 89g of drinking water. The copper cup is placed into a cooling device consisting of an insulated container which holds 85g of water equal in temperature to the drinking water. Ammonium chloride is added to the water in the cooling device (not the drinking water!) in order to cool the drinking water by 5.0°C? Theoretical value of molar enthalpy of ammonium chloride is 14.8 kJ/mol. The specific heat capacity of copper is 0.385(j)(g^1)(°C^-1)
The water level in a graduated cylinder initially at 216 rises to 287 after a piece of lead is submerged. What is the mass in grams of the lead?
determined using x rays methods. Remember a, b, c are unit cell dimensions . X', y' and z' are intercepts. Only the information you need is given . You may encounter as unusual rarely formed face
A solution containing 10.0 mmol CaCl2 is diluted to 1 L. Calculate the number of grams of CaCl2 . 2H2O per milliliter of the final solution.
How many peaks would you expect to find in the NMR spectrum of caffeine? What characteristic absorption bands would you expect to find in the infrared spectrum of caffeine?
The inositols are a group of naturally occurring stereoisomeric 1,2,3,4,5,6-cyclohexanehexols. The most commonly occurring inositol is shown at the below. Is the structure shown chiral or achiral
a student performs twomelting point determinations on a crystalline product. in onedetermination capillary tube
The dipole moment of SO2 and CO2 are 5.37x10-30 C.m and zero, respectively. What can be said about the shapes of the two molecules.
Calculate the standard emf of a cell that uses the Mg/Mg^2+ and Cu/Cu^2+ half cell reactions at 25?C. Write the equation for the cell reaction that occurs standard-state conditions.
Problem- What is the chemical equation for the above. Is there a reaction. If so, what's the balanced 1) molecular, 2) ionic, 3) net ionic equation. What are the states in the net ionic equation
Depict the skeletal structure of the major organic product resulting from the reaction of 2-methylbutane with Br2 in the presence of light and heat
If 30.0mL of .150M calcium chloride is added to 15.0 mL of .100 M silver nitrate what will be the final concentration of all ions the remain in the solution?
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
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