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What is the freezing point (in degrees celcius) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115g of water. the molar mass of Ca(NO3)2 is 164g/mol
Use the atomic radius (70 pm) and density of neon at 25 °C and 1 atm (0.90 g/mL) to calculate the average density of a neon atom.
Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the nature of the final microstructure (in terms of microconstituents present and approximate percentages
which of the following exhibits dipole-dipole intermolecular forces: HBr, NBr3, SBr2, CBr4?
In an earlier problem we described the reaction of ammonia with oxygen to form nitrogen monoxide, NO.4NH3 + 5O2 ? 4NO + 6H2O
Three resonance structures of the following cation are possible. One resonance form is given below, but it is incomplete. Complete the given structure by adding non-bonding electrons and formal charges where necessary
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?
The heat capacity of the bomb calorimeter is 34.65 kJ/K and the combustion of 1.742g of methanol raises the temperature of the calorimeter from 294.12K to 295.26K
A solution containing the two compounds exhibits absorbances (using a 1.00cm cell) of 0.726 and 0.544 at 267 and 312nm, respectively. What are the concentrations of A and B in mg/mL? Note: The aborptivity values are given in units of L/g.cm.
Using what you know about acid/base chemistry, determine the immediate effect that two 325-mg aspirin tablets would have on the pH of the stomach. Assume your stomach is half a liter in volume.
Calculate the volume of ammonia required to bring the pH to 3.00 and to 8.00. Kb (NH3) = 1.8 x 10^-5.
A 32.0 g sample of liquid water at 21.0C absorbs 2276 J of heat energy. What will be the final temperature of the water? The specific heat of liquid water is 4.185 J/gC.
Consider the reaction, 2 D(g) + 3 E(g) + F(g) => 2 G(g) + H(g) When [F] is decreasing at 0.60 mol/Ls, how quickly is [G] increasing
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