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The flask contains 10.0ml of HCL and a few drops of phenolphthalein indicator. The buret contains 0.270 M Naoh. What volume of Naoh is needed to reach the end point of titration? What was the initial concentration of HCl
a molecule has an excited state electronic energy level that emits radiation of 1lambda 360 cm-1 when it falls to the
At what temperature will He atoms have the same Crms value as N2 molecules at 25 degrees Celsius? Solve this problem without calcularing the value of Crms for N2. Crms is the root mean square speed.
Give the formula of a compound that contains a secondary hydrogen and Give the formula of a compound that is a secondary alcohol
Cavendish prepared hydrogen in 1766 by rather quaint method of passing steam through a red hot gun barrel. H2O + Fe ---> Fe2O3 + H2 (unbalanced) What volume of H2 at a pressure of 820 torr and a temperature of 23C can be prepared by a reaction of ..
Periodicity in the ionization energy and balancing the equation - Complete the following chemical reactions by writing the product(s) and balancing the equations:
Saturated steam at 1 atm condenses on a vertical plate which is maintained at a temperature 99 C. If the rate of heat transfer by condensation is 180 KW, determine the rate at which the condensate drips off the plate at the bottom.
when strongly heated magnesium sulfide formed a crystalline deposit on the walls of a sealed reaction vessel. metallic
Equal volumes of 0.316 M aqueous solutions of nitrous acid and sodium acetate are mixed. What is the nitrite ion concentration once equilibrium is established
According to the general trend in electron affinities, which group (or family) of elements tend to form the most stable anions
If 93 of heat are added to a pure gold coin with a mass of 11 , what is its temperature change? Specific heat capacity of gold is 0.128?
Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.350 mol of NaZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 8.93 at 25.0 °C
a student combusts 504.96 grams of ethene gas c2h4. how many liters of co2 g are produced at a pressure of 0.993 atm
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