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In every electrolyctic and galvanic (voltaic) cell the anode is that electrode: a) at which oxidation occurs. b) which attracts cations
Calculate the grams of formic acid and sodium formate necessary to make 500 mL of a biffer that has a formic acid concentration of .75M and a sodium formate concentration of .75M.
Calculate change of boiling temperature of pure liquid (say water) with change of atmospheric pressure ? (Pchem)
starting with only the solid, it is found that 40 degrees Celsius the total gas pressure (NH3 and CO2) is 0.363 atm. Calculate the partial pressure of NH3 and CO2.
A refrigeration tank holding 5.00L Freon gas (C2Cl2F4) at 25°C. and 3.00 atm pressure developed a leak. When the leak was discovered and repaired, the tank had lost 76.0g of the gas. What was th
A first order reaction has an activation energy of 65.7 kJ/mol and a frequency factor (Arrhenius constant) of 2.36 x 1013 sec -1. Calculate the rate constant at 18 oC.
How many grams of lead chromate form when a 1.00-g sample of Pb(No3)2 is added to 25.0mL of 1.00 M K2CrO4 solution?
If a 2.3 reaction vessel initially contains 721 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to drop to below 105?
The products formed are nitrogen, N2(g), and water, H2O(g). What volume of N2(g) measured at .975 atm and 298K is produced when 100 grams of H2O2 (g) is consumed?
When examining the geology of a region for potential aquifers, what characteristics or factors would you consider? also, what areas (based on natural and human) factors would you avoid?
What is the value of the rate constant? (Give your answer accurate to three significant figures. Do not give units as part of your answer, but use concentrations in mol/L and time in seconds.)
If a crystal added to an aqueous solution causes many particles to come out of the solution, the original solution was:
0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter. How many moles of HC2H3O2 were used?
Estimate the change of vapor pressure of water at t=25C when the pressure on the liquid (vapor plus additional gas) is increased by 1 atm. (i.e. calculate delta P/P0 , where P_0 is vapor pressure o
At 720 degress celcius the KC for the reaction N2 + H2 <--> NH3 is 2.37X10-3 in certain experiment the eq. concentration are (N2)= 0.683M, (H2)= 8.80M, (NH3)= 1.05 M. Suppose the NH3 is raised
Of the following anions, Br-, CO32-, Cl-, I-, NO3-, NO2-, PO43-, SO42-, SO32-, list those ions that meet the following criteria: Is involved in an oxidation-reduction reaction as part of a confirma
A total of 1.00 L of oxygen gas was collected over water at 25 degrees c and 741 torr. determine the percentage of potassium chlorate in the mixture.
The pressure of the sample was measured at .796 mmHg. if the vapor pressure of water at 40 degrees C is 55 mmHg, what is the partial pressure of the nitrogen gas?
In 2008, carbon dioxide levels at the South Pole reached 385 parts per million by volume. (The 1985 reading was 314.6 ppm by volume.) Convert the 2008 reading to a partial pressure (in bar). A
A solution of sodium nitrate, NaNO3, in water is 5.181 molar and its density is 1.2680 g mL-1. Calculate the percent, by weight, of sodium nitrate in the solution.
Molecular formula of nicotine which an empirical formula of c3h7n and molecular weight of 162g/mole
Describe the glassware and the technique you would use to take part of a sample of a solution of concentration 1.00 and make it into a solution of concentration 0.250.
toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. what is the molar concentration of arsenic in a water sample that has