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1.70 g of NH4NO3 is mixed with 79.0 g of H2O In a coffee-cup calorimeter, at an initial temperature =25.00 degree celsius. the final temperature of the calorimeter contents = 23.67°C After dissolution of the salt,. heat capacity of solution = 4.18 J/°C·g ( assuming no heat loss to the calorimeter) calculate the enthalpy change for the dissolution of NH4NO3 and expree your answer in units of kJ/mol.
a .350 g sample of a biomolecule was dissolved in 15.0 g of chloroform, and the freezing point depression was determined to be .240 degree celcius. Calculate the molar mass of the biomolecule.
you observed that a high dilution of a young culture was plated on a medium known to support its growth, but after 48 hours of incubation, the plate showed no growth. Give two possible explanations for these results.
Draw the structure(s) of all carbocations that could potentially form from the alkene and label each carbocation as primary, secondary or tertiary. 2-methylpropene
illustrate the reaction that would form a carboxylate ion from 2-Methylbutanoic acid. Write the IUPAC name for the ion that forms. Can you please show the condensed format versus the line angle?
What is the molarity of a solution made from 23.1g of NaNO2 dissolved in enough water to make 500ml solution
Which of the following compounds will yield 1-hexanol when treated with butylmagnesium bromide followed by acid workup? 1-hexanol
Consider an apparatus shows gases in two containers and one empty container. When the valves are opened and the gases are allowed to mix at constant temperature, what is the distribution of atoms in each container
which is the stronger acid HCL or HBR and which is the stronger base Cl or Br?
Calculate the quantity of energy produced per mole of -235 (atomic mass = 235.043922 ) for the neutron-induced fission of -235 to produce -137 (atomic mass = 136.9253 ) and -97 (atomic mass = 96.910950 ). E= J/mol U235
when 8.00g of NaOH is added to a calorimeter filled with 75.0mL of HCl the temperature of the solution increases for 25.0 C to 33.5 C. calculate the molar heat of neutralization for the NaOH. (assume that the density of the solution is 1.00gmL)
diazomethane and ozone both behave as 1,3 dipoles. Indicate, by drawing their resonance forms, how they can behave as 1,3 dipoles and draw the products of the reaction with styrene.
Find the pH of the equivalence point and the volume (mL) of 0.0740 M KOH needed to reach the equivalence point in the titration
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