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You would like to determine the reaction enthalpy for Zn(s) + 2HCl(aq) ? ZnCl2(aq) + H2(g) In part 1 of your experiment you mix 50.0 ml of 2.00 M HCl with 50.0 ml of 2.00 M NaOH. Temperature of the solution rises from 16.9 to 30.4 oC. You determine the density of the resulting solution to be 1.04 g/ml. In part 2 of your experiment you use 100.0 ml of 1.0 M HCL and 1.3078 g of Zn(s). Density of 1.0 M HCl is 1.015 g/ml and heat capacity of the ZnCl2 solution is 3.95 J g-1 K-1. In addition, you look up the heat capacity of water (4.18 J g-1 K-1) and 1.0 M NaCl (3.93 J g-1 K-1); the enthalpy of neutralization for NaOH and HCl is -57.32 kJ mol-1. a) determine calorimeter constant b) determine reaction enthalpy for the Zn / HCl reaction c) if ?fHo (ZnCl2 aq) is -482.2 kJ mol-1 and ?fHo (HCl aq) is -165.2 kJ mol-1, what is you percent error?
Draw the most stable chair conformation for (1S,3S)-1-chloro-3-ethylcyclohexane. Please explain your answer.
iron has a density of 7.874 gcm3. what is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000
What is the mass of precipitate (in Grams) that forms when 235.5 mL of 0.129 M Na2SO4 solution is reacted with excess Ba(NO3)2 solution?
The methylamine hydrochloride dissociates completely in water to form methylammonium ion (CH3NH3+) and chloride ion.
How much Tris (molecular mass 121.14 g/mol) is required to react with 35 mL of 0.10 M HCl
Explain the role of a spin vane or boiling stones that are added to a liquid that is to be heated or distilled
Use the Rydberg equation to calculate the wavelength in nanometers of the spectral line of hydrogen for which n2 = 4 and n1 = 2.
A student wanted to determine the molar concentration of acetic acid in a commercial vinegar sample. He used a volumetric pipet to deliver 3.00 mL of vinegar to an Erlenmeyer flask, added about 30 mL orf water and 3 drops of phenolphthalein indica..
Write a balance chemical reaction showing that Ru2+ disproportionates in aqueous acid. calculate standard potential and the Gibbs Free Energy for the reaction.
Calculate the pH of a solution that results from mixing 37.6 mL of 0.127 M ammonia with 48.3 mL of 0.119 M ammonium chloride.
hydrogen and nitrogen have different molecular weights, so mass fractions will be different than mole fractions.
During a strenuous workout an athlete generates 2050.0 kJ of heat energy. What mass of water would have to evaporate from the athletes skin to dissipate this much heat
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