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If you have 200mg/L of stock solution of X and you needed to make 5ml of 20mg/L then you would need to use 0.5ml of stock solution and the rest would be water or the appropriate diluent.
Describe the hazards of each of the solutions. Explain why the mixture is not as hazadous as the original solution from a waste disposal point of view.
For an electron mobility of 500 cm2/N·s. calculate the time between collisions. (Ta ke mil = moin these calculations.)
What is the rate of the reaction if the concentration of CH3Br is doubled? (b) What is the rate of the reaction if the concentration of NaOH is halved
A 250 gram sample of water at the boiling point had 64.0 kJ of heat added. How many grams of water were vaporized. Heat of vaporization for water is 40.6 kJ/mole
lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead (ii) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265g of lead(ii) sulfide?
If the activation energy for a given compound is found to be 103 kJ/mol, with a frequency factor of 4.0 × 10^13 s^-1, what is the rate constant for this reaction at 398 K
estimate the enthalpy change for the combustion of hydrogen gas in the presence of oxygen gas.
which effect on atomic size is more significant the nuclear charge or the energy level that electrons are filling?
Mass: 7.30*10^4 kg Al(s) Mass: 6.10*10^5 kg Oxygen (reacts with hydrogen to form gaseous water) 10 Al(s) + 6 NH4ClO4(s) --> 4Al2O3(s) + 2 AlCl3(s) + 12 H2O(g) + 3 N2(g) Assuming Aluminum and Oxygen are limiting, determine total energy. Delta Hf of..
On prolonged heating with concentrated hydrochloric acid, 2, 2-dimethyl-1-propanol, a primary alcohol, reacts to give 2-chloro-2methylbutane. provide a stepwise mechanism for this reaction
A sample of benzene was vaporized at 25 degrees C. When 37.5 kJ of heat was supplied, 95 g of the liquid benzene was vaporized. What is the enthalpy of vaporization of ethanol?
Exactly 75 mL of a 0.3132M solution of Na2SO3 were treated with 150 mL of 0.4025 M HClO4 and boiled to remove SO2 the formed. What was the mass of SO2 evolved and what was the concentration of unreacted NA2SO3 and HCLO4.
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