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Determine the number of calories and joules required to melt the ice given the following information:
Initial water temperature= 51oCInitial Volume of water = 25mlFinal volume of water = 32 mlMass of ice melted = 7gFinal temperature of water= 2oCTemperature change = -49oC
Which value is colosest to the POH of a 0.3 M solution of the weak base methylamine (CH3NH2)? the Ka for the acid form of methylamine is 2.27e-11 answer choices are 0.011, 1.94,3.92,10.08 and 12.06.
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is tripled and that of Br- is tripled? Just put in the number as a whole number or fraction.
When determining the pressure of dry hydrogen gas, explain how the measured atmospheric pressure is corrected for the presence
The product of the complete hydrolysis contained 1.8 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the ?-amino groups of other amino acids could be found How many polypeptide chains are in this protein?
The other plate was placed in a chamber containing hexane, and after developed it showed two spots, one with an Rf value of 0.54 and one with an Rf value of 0.37. Explain how this occurred
Phosphorus-32 is used in the form of Na2HPO4 in the treatment of chronic myeloid leukemia, among other things. (a) The isotope decays by beta-particle emission. Write a balanced equation for this process.
A water sample is suspected to be contaminated by iron (III) ions. How could you determine if the sample is really contaminated
1.52g of an oxide of nitrogen contains 0.56 g of oxygen. determine the empirical formula of the compound.?
Find the Fourier transform of the function exp(-πx2/ σ2). Explain how the width and height of the bands are inversely related in the two domains. Why should this be so
Consider the titration of 52.0 mL of 1.2 M NaOH with 1.0 M HCl. Find the pH at all the following points. At the equivalence point.
An unknown monoprotic weak acid, HA, has a molar mass of 55.0. A solution contains 2.50 g of HA dissolved 800. mL of solution. The solution has a pH of 2.000. What is the value of Ka for HA
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