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A calorimeter contains 25.0 grams of water at the temperature of fifteen degree celsius . When 2.10 grams of a substance ( molar mass =44.0 ) is mixed, it dissolves via the reaction and the temperature of the solution raises to twenty six degree celsius.compute the enthalpy change, , for this reaction per mole.
suppose that the specific heat & density of the resulting solution are equal to those of H2O [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.
A solution is prepared at 25 degrees Celsius between 150 mL of 0.15 M C6H5COOH and 12.5 grams of C6H5COONa. What is the resultion pH of the solution, assuming no volume change.
The goal of the recrystallization procedure is to obtain purified material with a maximum recovery. For each of the following situations, explain why this goal would be adversely affected.
the heat of neutralization for this acid-base reaction is measured by using nbspa coffee cup calorimeternbsp the
Write the structural formula of the main organic product for the following reaction between an alcohol, tosyl chloride, and then a nucleophile.
which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl
osmium has a density of 22.6 gcm3. what volume would be occupied by a 21.8 g sample of
The Apparatus shown consists of three bulbs connected by stopcocks. What is the pressure inside the system when the stopcocks are opened?
The base peak in the mass spec of phenylacetic acid indicated that the compound lost a fragemnt that has an m/z= 17. This fragmentation corresponds to the loss of a(n)
Starting with butane, 2-bromobutane or 1-bromobutane, please show the reaction/mechanism for how could prepare
Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water. N2H2(aq)+O2(g)=arrow=N2(g)+2H2O(l)
Compute the number of moles - As we know many volatile substances are present in Earth's atmosphere in trace amounts.
How do I calculate the product distribution calculations of the three peaks? Or the product ratios? The first peak was at 0.600, second at 0.95. Those are the retention times
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