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When 10.00 mL of a solution of strong acid is mixed with 100.00 mL of a solution of weak base in a coffee-cup calorimeter, the temperature rises from 22.5 oC to 26.9 oC. Determine q for the acid-base reaction, assuming that the liquids have densities of 1.00 g/mL and the same heat capacities as pure water.
draw the lewis structure for the zwitter ion of cysteine, acetylcholine, seratonin, and the carbonate ion?
Calculate the heat evolved in kilojoules by the formation of the solution. Calculate the heat evoled per mole of sulfuric acid. Use n(changeH) = -(mCchangeT)
The molecular mass of an unknown compound was determined by measuring the freezing point depression of an aqueous solution of the compound
how many moles of N atoms are there in .882 moles of (NH2)2CO?
Assume that the heat capacity of water for the temperature rangere in the heat exchanger is constant at 7.54x10^-2 kJ/mol C) What is the temperature of water leaving the heat exchanger?
Draw the repeat unit of the copolymer used for artificial skin growth, which is formed by condensation polymerization of lactic acid and glycolic acid.
orbits around a definite point in space made of neutrinos and electrons D) is not a definite point in space, but rather it is a cloud of smaller particles called quarks that deflect alpha particles
times that of nitrogen gas ( at the same temperature). calculate the molar mass of the unknown gas in g/mol?
Consider a light-sensative reaction. What energy in joules per photon, is needed to drive the reaction if delta H of the reaction is equal to 793 kJ/mol. (Remember that there are Avogadro's number of photons per mole of photons.)
How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mass solution.
The flask was then shaken until the solution was uniform. A 55.0-mL sample of this glucose solution was diluted to 0.500L . How many grams of glucose are in 100mL of the final solution?
A graduated cylinder contains 110. mL of water. A 10.0 g piece of iron (density = 7.86 g/cm3) and a 18.9 g piece of lead (density = 11.3 g/cm3) are added. What is the new water level in the cylinder?
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