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How much energy is required for an electron in a Hydrogen atom to make a transition from the n=2 state to the n=3 state? What is the wavelength of a photon having this energy?
Titrate with 0.1005 M NaOH and arrive at an endpoint at 24.20 ml. You know that at the final pH both protons have been titrated. What is the Molar Mass of the acid
Calculate the molarity of a solution made by dissolving 0.140 mol Na2SO4 in enough water to form exactly 800mL of solution.
the smell of ripe raspberries is due to4-p-hydroxyphenyl-2-butanone which has the empirical formulac5h6o. to find its
In a certain hypothetical experiment the initial concentration of reactant is 1.00 and its rate constant is 0.0150 . It follows a zero-order reaction mechanism for the consumption of . Plot the graph of concentration versus time. Take the time int..
Why is it that F2gas chemistry cannot be done in normal laboratory glassware?
A 773 mL sample of NO2 gas is at STP. If the volume changes to 648 mL and the temperature changes to 15ºC, what will be the new pressure in atmospheres
A student does a mini-titration with an unknown acid by adding 13 drops of 2M NaOH to 9 drops of the unknown solution. What is the concentration of the unknown acid
A saturated solution of this substance was made in 0.01 M KlO3. The copper concentration was found to be 0.0012M. Determine the [IO3^-] and the Ksp of the substance.
If you start with 1.000 g of sulfur (S8) and obtain 4.963 g of pure compound. What is the empirical formula of this compound?
If it is a buffer solution what is the pH of this buffer solution. how many mil of 1.5 M HCl can be added to this solution before the buffer is exhausted. how many ml of 1.5 M NaOH can be added to this solution before the buffer is exhausted
At a given temperature, what relationship appears to exist between a gas particle's mass and its speed
Caculate the pH of a solution that has 40.00 mL of 0.0900 M NH3 and 0.1000 M HCl is being added at a volume of 35.95 mL
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