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How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 7.90 to 6.16? Use E notation and 3 significant figures.
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
Starting with Benzyl alcohol (PhCH2OH), ethyl acetoacetate (CH3COCH2COOEt) and any other neccesary organic or inorganic reagents outline a synthesis
If only 10ml of 3.0 M KOH were used in the alum preparation instead of the specified 25 ml,would KOH then become the limiting reactant? Write the chemical equation for the conversion of Al(s) to solid aluminum alum KAL(SO4)2*12H2O (S)
The tank is first evacuated, and then it is connected to a 50.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 21.5 atm, falls to 1.55 atm without a change in temperature. What is the volume of the tank?
How much energy (in calories) is needed to heat 17cm^3 of fat from room temperature (25 C) to its melting point (35 C)?
Calculate the pH of a solution resulting from mixing together the following: a) 37ml of HCL 0.1M+33ml of NaOH 0.03M b) 55ml of HNO3 0,7M+88ml of KOH 0.8M c) 170 ml of H2SO4 0,44M_29ml of NaOH 1.2M d)76 liters of HBr 0.01M+2 liters of Mg(OH)2 2.1M.
If the 53 g aluminum block is initially at 25^circ C, what is the final temperature of the block after the evaporation of the 1.02 galcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and t..
a balloon filled with helium gas at 1.00 atm occupies 15.6 L. What volume would the balloon occupy in the upper atmosphere, at a pressure of .15 atm
In a seperate trial the student puts 214 mL of the same liquid into the same flask at the same conditions. What will the pressure measure (in kPa) in the second trial?
You respond to a 2AM liquefied compressed gas transportation accident which is leaking from a 5lb (2.3kg) steel cylinder. Chemical commodity on shipping paper is 5 lb RQ, compressed gas, flammable, toxic, n.o.s. (poison - inhalation hazard, zone B..
A solution is made by mixing 15.0 g of NaOH and 71.0 mL of .19 M HNO3. Calculate the concentration of Na+ ion remaining in solution.
In the Balmer-Rydberg equation, what value of is used to determine the wavelengths of the Balmer series?
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