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Ethylene glycol, C2H6O2, is widely used as an automotive antifreeze. What is the minimum weight, in grams, of this compound that must be added to 10 kg of water to produce a solution that will protect an automobile cooling system from freezing at -20 ºC? Ethylene glycol is a non-electrolyte. Kf for water is 1.86 ºC/m.
the frequency factor a is 8.7x 10 12 s- and the activation energy is 63 kj/mol, What is the rate constant for the reaction at 75C
The density of pure silver is 10.5 g/cm^3 at 20°C. If 4.63 g of pure silver pellets is added to a graduated cylinder containing 12.1 mL of water, to what volume level will the water in the cylinder rise.
How much heat does your body lose when 1.5 g of sweat evaporates from your skin at 25 C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 C is 44.0 kJ/mole.
how many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?
CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
The mass spectrum of an organic compound shows the relative abundances of M to be 36.44% and M 1 to be 8.277%. Assuming the peaks are caused by 12C and 13C isotopes
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
Suppose that 1.08 g of rubbing alcohol (C3H8O) evaporates from a 75.0 g aluminum block.If the aluminum block is initially at 25 C, what is the final temperature of the block
Oxygen at 150 K and 41.64 atm has a tabulated specific volume of 4.684 cm3/g and a specific internal energy of 1706 J/mol.
What is the molarity of ZnCl2 that forms when 30.0 grams of zinc completely reacts with CuCl according to the following reaction? Assume a final volume of 275.
How many moles of each of the following were in the original sample? What is the molecular formula?
Descibe at least four possible factors which may influence the amount of light absorbed by a solution and how these factors may affect the absorption
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