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A cleaning solution is found to have a [OH-] = 3.2 x 10-12M. What is the [H3O+] and is the solution acidic or basic?
What is valency of an element. What is the valency of Cl in HCl. What is the valency of nitrate radical in Nitric acid and sulphate radical ion in sulphuric acid. What is the valency of elements which do not combine with hydrogen.
It is estimated that more than 5 billion metric tons of CO2 is added to the atmosphere each year. Assume that CO2 is an Ideal gas at 25 oC and 1 atm.
The reaction that was on the screen when you started and its derivative demonstrate that the change in enthalpy for a reaction, Delta H, is an extensive property.
A sample containing 2.20 moles of neon gas has a volume of 8.00 L. Assume that the pressure and the temperature remain constant. What is the new volume of gas in liters when a sample of 70.0 g neon is added to the neon gas already in the container..
An unknown radioactive substance has a half-life of 3.20 hours. If 46.0 g of the substance is currently present, what mass was present 8.00 hours ago
Cobalt-60, which undergoes beta decay, has a half life of 5.26 years.
If the yield of this reaction is 82% and aluminum ore is 71% by mass aluminum oxide, what mass of aluminum ore must be mined in order to produce 1.0 × 103 kg (1 metric ton) of aluminum metal by the Hall process
A flywheel weighing 600 N has a radius of gyration of 300 mm.It starts rotation at 600 rpm and due to the viscosity of the fluid in the sleeve it is retarding at the rate of 1 rpm/s.
A pharmaceutical company needs to prepare a batch of 5000 bottles containing 80 tablets each with 325 mg of aspirin per tablet. How many kilograms of salicylic acid are needed to produce the needed aspirin
Calculate the amount of Tris (hydroxlmethyl) aminomethane (Tris) necessary to make 100mL of a 0.100M Tris buffer that is equimolar in
When 200 ml of an aqueous benzoic acid solution were extracted with 30 ml of ethyl acetate, 45% of the benzoic acid were extracted. Calculate the partition coefficient of benzoic acid
What is the molar mass (g/mol) of unknown carbonate number in the titration of Hcl & Naoh Average titre of Naoh (1.023M) is 22.5 ml.
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