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Explain what is the concentration Molarity of a base solution containing .235g NaOH in 500.0 ml of total solution?
Suppose you are given a 2.75 g sample of the orginal mixture. You isolated the pure metal from the other components and determined that the mass of the metal was 1.25 g. What is the percent by weight of the metal in the orginal sample
How many grams of dry need to be added to 2.50 of a 0.700 solution of ammonia, , to prepare a buffer solution that has a of 8.65. for ammonia is.
What is the common purpose of these precautions: flaming the apparatus before running the reaction; using a drying tube to separate the atmosphere inside the apparatus from the outside air;
Hypohalic acid, HOX, is a weak acid with a Ka of 3.341x10-8. What is the pKb for the hypohalite anion, OX-, in a 0.8865 M solution of KOX
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
An electric power station burns 5.0 ´ 105 tons [1 ton = 2000 lbs] of coal annually. Assuming that the coal is 100% carbon, calculate the volume of CO2 emitted at STP by this power plant annually. [1 lb = 453.6 g].
The first order decay of radon has a half-life of 3 days. How many grams of radon remain after 7.22 days if the sample initially weighs 250.0 grams
If a reaction has Ea=+40.0 kJ/mol and is run at room temperature (298 K). At what temperature will the rate be twice the rate at room temperature
Use the angular overlap model to calculate the energies of both ligand and metal orbitals for trans-[Cr(NH3)4Cl2]+ , taking into account that ammonia is a stronger? donor ligand than chloride, but chloride is a stronger ? donor. Use the 1 and 6 po..
The 11B nucleus has a spin I of 3/2 and a nuclear g factor of 1.7920. At what field would resonance be observed at 60 MHz?
Presume that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385torr. If all the oxygen as is removed from the mixture by reaction with phosphorus, which doesn't react directly with nitrogen then the new press..
show work on the mineral greenockite is yellow sulfide of cadmium that is 78.0% cadmium and 22.0% sulfur. determine the empirical formula of greenockite.
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