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Hypothetical element X has 3 stable isotopes. The relative peak intensities are 62.05 for 180.0 u, 100.0 for 184.0 u, and 80.45 for 186.0 u. Explain what is the average atomic mass for X?
consider the following ksp values for metal sul?desmgc2o4 8.6 times 10-5coc2o4 2.7 times 10-9cuc2o4 2.9 times
What is the mole fraction of methane in the mixture? (Assume that the water produced by the combustion is in the gaseous state.)
A 14.0-g sample of CaCl2 is dissolved in 112 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C ..
Assuming that the peaks are Gaussian, calculate the % resolution, i.e. calculate the area under the first peak which lies to the left of half way between the two peaks.
Three possible resonance structures are shown below for the SO2Cl2 molecule. Using formal charge, determine the order of stability of the three structures (i.e. the order in which they contribute to the overall resonance hybrid structure).
a protein subunit from an enzyme is part of a research study and needs to be characterized. a total of 0.160 g of this
Explain the atmospheric pressure in Mexico City is about 580torr. Briefly define the difference between this and the standard atmospheric pressure at the sea level.
Explain why in some cases a compound may be an acid as well as in other case not? For example, HCL (hydrogen chloride).
High altitude balloons used by environment Canada to measure O3 levels in the atmosphere also use a similar idiometric titration where the iodine liberated is measured by back titration with sodium thiosulfate. In this case the iodine is generated..
How much energy is required to vaporize 48.7 g of dichloromethane (CH2Cl2) at its boiling point, if its ?Hvap is 31.6 kJ/mol?
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 in aqueous NaCN.
what would the rate constant be at a temperature of 150C for the same reaction described in Part A?
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