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One liter of a buffer solution is prepared by dissolving 0.115 mol of NaNO2 and 0.070 mol of HCl in water. What is the pH of this solution? If the solution is diluted two fold with water, what is the pH?
One radio station operates on an assigned frequency of 88.1 megahertz while another operates on an assigned frequency of 1460 kilohertz. What is the ratio of the larger to smaller value?
By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment - determine theoretical and percent yields for this experiment.
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced.
Reduce the production of hazardous waste and encourage recycling and reuse of hazardous materials by charging producers a tax or fee for each unit of waste generated.
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons.
Important information about Heat of Reaction, The combustion of butane produces heat according to the equation 2C4H10(g) + 13O2(g) --> 8CO2(g) + 10H2O(l) deltaHrxn= -5314kJ
54.0 mL of a 1.40 M solution is diluted to a volume of 218 mL. A 109-mL portion of that solution is diluted using 183 mL of water. What is the final concentration.
A chemist wants to make 5.5L of a 0.280M CaCl2 solution.What mass of CaCl2 (in g ) should the chemist use
calculate how much CaCN2 is required to form 12.6 moles of ammonia? Given that the percent yield is 65.8%?
Discuss how to find the molar mass of a compound, percent composition of the elements of a compound and how to determine the empirical and molecular formulas from percent composition.
when 3.02g NH4Cl solid was dissolved in 20.05 ml water the temperature of the water dropped from 19.8 degrees celcius to 9.1 degrees celcius
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
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