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A biology experiment requires the preparation of a water bath at 37.0°C (body temperature). The temperature of the cold tap water is 22.0°C, and the temperature of the hot tap water is 65.0°C. If a student starts with 70.0 g of cold water, what mass of hot water must be added to reach 37.0°C?
Determine the pH (to two decimal places) of the following solutions. A table of pKa values can be found here. If the 5% approximation is valid, use the assumption to compute pH.
A sample of neon effuses from a container in 79 seconds. The same amount of an unknown noble gas requires 161 seconds.
what is the maximum amount of P4S10(444.545 g/mol) which could be formed from 17.12 g of P4 (123.895 g/mol) and 0.137 mol of S8 (256.52 g/mol).
Determine how many grams of sodium chloride are required to prepare 250. mL of this solution. (if given the density of the saline solution is 1.0 g/mL)?
1)MgBr2 and Pb(NO3)2 2)CuSO4 and H2S write ionic equation (molecular reactions, ionic equations and net ionic equations indicating the spectator ions in these reactions)
Write the nuclear equation for the alpha decay ( production of radioactive decay that may be considered radioactive waste products by the useful production of nuclear energy ) of each nuclide that are products of a nuclear power plant Rn-222, T..
What is the enthalpy of this reaction. Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
if 18.6 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution what is the molar concentration
Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol.
5.0 gram sample of kbr at 25 degrees celsius dissolves in 25 ml of water also at 25 degrees celsius. the final
What is the pH of a solution made by mixing 100.00 mL of .20 M HCl with 50.0 mL of .10 M HCl. Assume that the volumes are additive
What is the pressure in millimeters of mercury of 0.0110 mol of helium gas with a volume of 208 mL at a temperature of 35 degrees C?
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