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During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solution\'s final volume is 100.0 mL, the density is 1.00 g/mL, and the specific heat is 4.184 J/(g·°C), calculate the heat of the reaction, ?Hrxn.
Ca(s) + 2H+ (aq) ---> Ca2+ (aq) + H2(g)
Delta H rxn
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
Explain the valences for each, showing what may happen to the electronic structure in each case
If the pressure increases to 800. torr, how many moles of gas were added to the container? Assume a constant-volume container.
Which of the listed perturbations would change the vaule of the equilibrium constant for the following reaction?
universe on assumption that heat capacities are independent of temperature
Calculate the electrode potential of the following half cell if it was at standard conditions. Then recalculate how this changes using.
Calculate the solubility of silver chloride in a solution that is .100 M in NH3. Ksp for AgCl = 1.77x10^-10. Kf for Ag(NH3)2+ = 1.7x10^7
Each of 2 front tire in the car is filled with a different gas. One tire contains 116g of helium, another tire has 160g of unknown gas. How many times heavier is a molecule of the unkown gas than an atom of helium.
what is moisture content of exhaust? iii) power generated by turbine? iv) at what rate would entropy be generated within turbine? v) assuming the temp of the surroundings T(sigma)=300K what is lost work in kJ/kg of steam?
what is the molarity of a solution prepared by dissolving 2.06g of NaOH in a volume of 500.0ml?
the starting concentration of reactants (Q) and products (R) are both 15 uM, then the equilibrium concentration of Q and R is what in uM?
Although the term "melting point" is used to describe a solid/ liquid change, we generally list melting ranges rather than single melting point. For most pure substances,
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