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1) For the reaction: 2HCl(aq) + CaCO3(s) = CaCl2(aq) + H2O(l) + CO2(g). What should you observe happening to the gas produced A) If the concentration of the acid HCl is increased? B) If the solid calcium carbonate is in powder form? 2) The temperature of a reaction was increased from 20 to 40deg.C. You were determining the rate of reaction at each of the 2 temperatures. The second reaction should be faster by how much?
pure nitrogen can be prepared when an aqueous solution of ammonium nitrite decomposes to form water vapor and nitrogen gas. How many grams of ammonium nitrate must have reacted if 3.75dm3 of nitrogen gas was collected over water at 26C and 97.8 kP..
A person is considered legally intoxicated with a blood alcohol level of 80 mg/dL. Assuming that blood plasma has a density of 1.025 g/mL, what is this concentration expressed in parts per million
How is the rate of consumption of O2 related to the rate of consumption of NH3? (b) How is the rate of formation of NO related to the rate of consumption of NH3? (c) How is the rate of formation of H2O related to the rate of consumption of NH3?
A car battery contains 1.0 L of 4.3 M sulfuric acid. Using the value in your answer to question E., calculate how many TUMS® tablets would be required to neutralize all the sulfuric acid in a car battery.
Differences in boiling points, Rationalize the difference in boiling point between the members of the following pairs of substances:
Assume that the only amino acid in a particular protein that absorbs at 280 nm is tryptophan, and that this particular protein has 2 moles of tryptophan per mole of protein.
Calculate the Z for the fourth ionization of Ti when it requires 425.6 kJ of energy to ionize 0.185 moles of Ti^3+ to Ti^4+ ( The electron being removed is in the outermost valence orbital of Ti^3+ ground state, therefore n = 3)
If 15.78 mL of a Na2S2O3 solution were required to titrate the iodine formed from 20.95 mL of a 0.0111 M KIO3 solution and excess KI, what is the molarity of the Na2S2O3 solution?
The overall equilibrium involves Ksp, Ka3 of phosphoric acid and Kw. Construct the constant and show the three equations that apply.
What is the final volume in milliliters when 0.780 of a 39.7 (m/v) solution is diluted to 25.0 (m/v)? Express your answer numerically in milliliters.
Calculate the change in entropy of a system (in Joules) when 20.0 moles of oxygen gas undergo an isothermal reversible expansion from 30.0 L to 80.0 L.
Which of the two ionic compounds, NaCl or CaCl2 has the larger lattice energy. Why
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