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You performed these reactions in an acidic solution (diluting with 0.1M HNO3). This is because iron forms an insoluble hydroxide ion (i.e. even in slightly acidic solutions). If the precipitate that forms is Fe(OH)3(s) write the chemical reaction (molecular and full ionic)for the formation of this material starting with Fe(NO3)3 in aqueous solution. What effect, if any, would you predict using water in place of 0.1M HNO3 have on the absorbance of this solution at 450 nm for test tube # 10?
What is the change in internal energy of the system, delta U. The force of gravity on a mass m is mg, where g is the constant acceleration of gravity (g=9.80 m/s^2).
The mass spectrum of an organic compound shows the relative abundances of M to be 36.44% and M 1 to be 8.277%. Assuming the peaks are caused by 12C and 13C isotopes
what is the temperature change if 84 joules of heat are added to a pure gold coin with a mass of fifteen grams? it is
What would be the volume of product gases (CO2 and H2O) at STP from 0.50 mole cyclohexanone (in presence of excess oxygen)
you will need to construct a calorimeter to complete this project. what are the necessary features of a calorimeters. please answers have to be related to chemistry and specifically to this experiment.
Using the van der Waals equation, calculate the pressure exerted by 15.0 mol of carbon dioxide confined to a 3.00-L vessel at 56.0 oC. Note: Values for a and b in the van der Waals equation: a = 3.59 L2.atm/mol2, and b = 0.0427 L/mol.
Draw the structure of the dimer. Water (circled) is eliminated when the bond between the monomers forms. Circle the atoms of the ester functional group.
The Henry's law constant for O2 in water at 25 Celsius is given in Table 14.2. Which of the following is a reasonable constant when the temperature is 50 Celsius? Explain the reason for your choice.
a radioisotope used to evaluate heart function in exercise stress tests, decays by capturing one of its own core electrons. it also emmits gamma rays. write an equation for its nuclear decay, then identify the daughter isotope
an ecobotanist separates the components of a tropical bark extract by chromatography. she discovers a large proportion
Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks.
You are given a small piece of gold colored material and want to determine if it is actually gold. Using the Archimedes' Principle, you find that the volume is 0.40 cm3 and the mass is 6.0 g. What conclusions can you reach from your simple density..
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