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Explain why either greatly decreasing or increasing the percentage of oxygen in the atmosphere is dangerous.
The solution to 2.00 L and then shows an absorbance of 1.096. 50.0 mL of the solution is then mixed with 15.0 mL of 4.00 x 10^-4 M KMnO4 and the absorbance of the resuling solution is 1.097. what was % w/w Mn in the steel? (% w/w). FM of Mn is 54...
When the following equation is balanced, H2S + Fe(OH)3 ----> Fe2S3 + H2O the coefficient of H2S is
Limonene (mw 136) is a pleasant smelling liquid found in lemon and orange peels. the bp of limonene is 175, but it co-distills with water at 97.5. if the vapor pressure of water at 97.5 is 690 mm hg, what percentage of the steam-distillate is limo..
when a particular marble is dropped into a beaker of water it sinks to the bottom. which is the best explanation? a.
An aqueous solution of an acid HX has a pH of 5.34,what is the value of Ka for HX and calculate the percentage dissociation of HX in the solution
Dissolving NH4NO3 in water is an endothermic process. In fact, this reaction is often used in cold packs sold at the drug store. When 23.8 g of NH4NO3 was rapidly dissolved in 79.5 mL of water in a coffee cup calorimeter,
Problem- SiCl4 is exposed to radiation (photons) with a wavelength of 3 x 10-7m. Determine if the compound is stable under these conditions or not. Solve this problem by making use of Pauling's treatment of polar covalency
What mass of silver is plated onto the cathode by running at 3.3A for 5.7h?Upon recharging, how long would it take to redissolve 110g of silver at a charging current of 10.0 amps
What is the frequency of ultraviolet light with wavelength 2.51 × 10-8 m? (c = 3.00 × 108 m/s)
Did an experiment where we extracted the caffeine in 1 bag of tea. We added the bag of tea leaves to the solution where the sodium carbonate solution. Explain what the purpose of adding the sodium carbonate was.
When the concentrations of CH3Br and NaOH are both 0.165 M, the rate of the reaction is 0.0050 M/s. What is the rate of the reaction if the concentrations of CH3Br and NaOH are both increased by a factor of four
The bromination solution is prepared by mixing liquid bromine with glacial acetic acid 1:4 v/v (bromine to acid). The density of bromine is 3.12 g/mL. Calculate the molarity of 1.00 L of bromine solution.
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