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devise a general method for determining the fractional abundances of two or more isotopes from a mass spectrum. your method must include some means of measuring the signals
Write the formula of the nine chemical substances mentioned in the introduction. Classify each as either a molecular compound, an ionic compound, a molecular element, or a metal. For the copper cycl
what are the balanced molecular equations for all of the chemical reactions involved in the copper cycle experiment? There are eight of them.
Calculate the average molar mass of this element. The mass of the neutron is 1.67262164 × 10324 g and the mass of the proton is 1.67492721 × 10324 g. Assume for each isotope, the mass de
Choose all of the processes from below which describe changes which are independent of the path by which the change occurs. the elevation increase experienced by a traveller travelling from Grand Isle
22.05 mL of a sodium hydroxide solution is needed to react completely with 0.5210 g of KHP (molar mass+204.22) What is the concentration of the sodium hydroxide solution
For example if your compound is water and you have the information the boiling point, Tb=(99.98 C), the enthalpy of vaporization= (40.65 kJ/mol) and the molar mass= 18.02g/mol.
two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7 Hz); ? 4.37 (1H, q, J = 7 Hz).
What are the 8 balanced molecular equations for all of the chemical reactions involved in the copper cycle experiment
What volume of 0.250 M Na3PO4 is required to precipitate all the lead(II) ions from 180.0 mL of 0.550 M Pb(NO3)2
A sample of N2O3 (g) has a pressure of 0.017 atm. The temperature of (in K) is then doubled and the N2O3 undergoes complete
How many grams of alum can be obtained from 20.0 g of aluminum when the reaction proceeds with 100% yield? How many grams of alum would be obtained if the reaction were to proceed with 80.0% yield
When 0.583 g of neon is added to an 800cm^3 bulb containing a sample of argon, the total pressure of the gases is found to be 1.17 atm. at a temperature of 295 Kelvin. Find the mass of the argon in
12.0 moles of a gas (SO2) under non-ideal conditions was measured to have a pressure of 1.00*10^2 atm in a 3.00 L container. What is the temperature. the van der Waals constants for SO2 are a= 6.865
Given the Rydberg constant of -2.18x10^-18 J, Calculate the wavelength of the emitted photon for the first transition (highest energy) in each series.
The vapour pressure of a solvent is the amount of gaseous molecules over an open vessel of the solvent. A 50/50 mixture of benzene and toluene has 46.7 Torr of benzene and 13.5 Torr of toluene at ST
The zinc content of a 1.45 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH
how many grams of copper are produced when excess aluminum reacts with 11.0 g of copper oxide.
The rate law for a reaction is rate = k[A]^2 [B]. When the concentration of A and B are both 0.15M, the reaction rate is 0.115M/s. What would be the reaction rate when [A] = 0.30M and [B] = 0.45M
A mixture of CO(g) and O2 (g) in a 1.0-L container at 1.0x10^3 Kelvin has a total pressure of 2.2 atm. After some time the total pressure falls to 1.9 atm as the result of formation of CO2. Find the
The equilibrium constant of a reaction is 1.04e+02 at 362 K and 2.39e+03 at 465 K. Determine the following for this reaction
If it takes 3.50 minutes for the concentration of the reactant in a first order reaction to drop in concentration from 1.20M to 0.400M, how long will it take for the concentration to drop from 0.400
In the reaction 2 C8H18 + 25 O2 ? 16 CO2 + 18 H2O, if the rate of change in the concentration of CO2, ?[CO2]/?t, equals 0.51M/s, what is the value of ?[O2]/?t, the rate of change in the concentratio
Consider 4.40L of a gas at 365mmHg and 20degrees C . If the container is compressed to 2.60L and the temperature is increased to 30 degrees C , what is the new pressure, P2, inside the container? As
The balloon ascends to an altitude of 20 km, where the pressure is 76.0mmHg and the temperature is -50 degrees C. What is the new volume, V2, of the balloon in liters, assuming it doesn't break or l