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Write the molecular, total ionic and net ionic equations summarizing the reaction between aqueous solutions of potassium chloride and silver nitrate.
What is the difference between "knobs in holes" conformation versus "ridges in grooves" conformation, especially which type of alpha proteins would we typically find such conformations
How many grams of this acid will be required to titrate 45.0 mL of 0.18 M NaOH solution? H2C2O4 + 2NaOH > 2 Na^+ + C2O4^-2 + 2 H2O
A tank contains helium for filling balloons. It holds 6.75 L of He at 49.6 atm and 25.1 °C. What would be the volume of this helium at 1.66 atm and 10.7 °C
the equilibrium would shift to the right making more products e. the equilibrium would shift to the left making more products
Calculate the volume of oxygen,measured at STP, produced by the decompistion of 2.87 g of potassium chlorate.
A reaction that is spontaneous can be described as a releasing heat to the surroundings. b. increasing in disorder. c.proceeding in both the forward and reverse directions.
The enthalpy and entropy values are listed beneath each substance: 2 A + B ? 3 C + D ? Hf (kJ/mole) - 200 -50 -18 - 25 ? s (J/moleK) 25 40 300 75
Calcium has a work function of 4.64x10^-19 J. Which of the following wavelenghts will eject electrons from calcium
Identify the following salts as neutral acidic or basic: 1. LiNO3 2. SrBr2 3. LiF 4. KCN 5. NH4ClO4 6. NH4Br 7. NH4CN Please include why are they neutral basic or acidic.
Octane has a specific heat of 2.22 J/g.K. (a) How many joules of heat are needed to raise the temperature of 40.0 g of octane from 10.0 oC to 40.0 oC? (b) Which will require more heat, increasing th
The complete combustion of methane, CH4, to form carbon dioxide gas and oxygen gas at constant pressure releases 890 kJ of heat per mole of methane consumed. (a) Write a balanced thermochemical equati
The figure shown below shows a typical titration curve for 0.1 M NaOH with 40 mL of 0.05M oxalic acid (H2C2O4). The first equivalent point is ~ at 9 .0 mL and the second equivalent point is at ~18 m
Calculate the amount of heat transferred when 7.10 g of Mg(s) reacts at constant pressure with excess oxygen. How many grams of MgO are produced during a run of this reaction which experiences an en
If the system below is at equilibrium in a closed vessel and a small amount of nitrous acid is added, what would be expected to happen
The unbalanced equation for the reduction of copper(I) sulfide with oxygen is given below. What mass of copper is produced from the reduction of 9.20 g Cu2S? Cu2S(s) + O2(g) Cu(s) + SO2(g)
A buffer solution contains 0.5 M HA pka=8 and 0.25M NaA. What is the pH after 0.1 mol of HCL is added to this solution, giving a total final volume of 2L
How long will it take 10.0 mL of nitrogen gas to effuse through a porous barrier if it has been observed that 89.1 minutes are required for 10.0 mL of Cl2 gas to effuse through the same barrier
Calculate the Gibbs Energy of reaction at 298 K for the following using 2 methods. First use enthalpies and entropies of formation and DrGo = DrH o - TDrS o to calculate DrG o.
The normal freezing point of water is 0.0C. at this temperature the density of liquid water is 1.000 g/ml and the density of ice is 0.917 g/ml. The increase in enthalpy for the melting of ice at thi
A .sodium iodate and calcium nitrate B. sodium nitrate and potassium hydroxide C. sodium iodate and iron (III) chloride D. sodium iodate and potassium hydroxide.
The limiting reactant in the salt mixture was later determined to be CaCl2x2H2O a) How many moles and grams of the excess reactant, K2C2O4xH2O, reacted in the mixture? b) How many grams of the K2C2O
iodination is electrophilc aromatic substion reaction in which electrophile is Iodonium (I^+) , it will updatined by the reaction of sodium hypochlorite (NaOCl) with iodide ion (NaI), which is stron
Given a column of air with a pressure of 1.57 x 10^5 Pa and an area of 1.04 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column
Analysis of an unknown substance showed that it has a moderate melting point and is a good conductor of heat and electricity in the solid phase. Which of the following substance would have those cha