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1. Consider a 75.0 gram sample of H2O(g) at 125 degrees Celsius. What phase or phases are present when 215 KJ of energy is removed from this sample?
2. A 0.250 gram chunk of sodium metal is cautiously dropped into a mixture of 50.0 grams of water and 50.0 grams of ice, both at 0 degrees Celsius. The reaction is 2Na(s)+2H2O(l) yields 2NaOH(aq)+H2(g) enthalpy=-368 KJ.Will the ice melt? Assuming the final mixture has a specific heat capacity of 4.18 J/g*degrees celsius, calculate the final temperature. The enthalpy of fusion for ice is 6.02 KJ/mol.
A wick of filter paper is placed in a TLC developing jar, and the atmosphere in the jar is saturated with solvent before a plate is developed. What would happen if a plate were developed in a jar with an atmosphere not saturated with solvent vapor
Two reactions have the same activation energy, but their rates at the same temperature differ by a factor of 10. Explain.
consider the conbustion of methanech4nbspch4g 2 o2g - co2g h2ognbspsuppose 1.5 mol of methane is allowed to react with
the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. N2(g)+O2(g)2NO(g) If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?
what is the ph when 0.005 moles of hcl is added to 0.100l of a buffer solution that is 0.100m in ch3co2h and 0.100m
How many of each type of atom are there in a cubic crystal with an edge length of 4nm?
The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated
Calculate the values of the rate constant k assuming that the reaction is first order
if nh32.0m h20.0013m and n2 0.033m then determine in which direction will the reaction proceed to reach equilibrium?
In a titration experiment, 50.0 mL of 0.375 M HI solution is required to neutralize 35.0 mL of Ca(OH)2 solution. What is the concentration of the Ca(OH)2 solution?
What is the difference between electron geometry and molecular geometry? How can knowing both assist in determining whether a molecule is polar or nonpolar?
metallic aluminum easily reacts with strong acids such as hcl to produce a salt solution and hydrogen gas. in an
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