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calculate the pH of 50 ml of .15 M HCHO2 with 75 mL of .13 M NaCHO2
Octane has a density of 0.692g/mL at 20 C. How many grams of O2 are required to burn 1.00 gal of C8H18?
The mole fraction of potassium nitrate in an aqueous solution is .0194. The density of the the solution is 1.0627 g/mL. Calculate the molarity of the solution.
The dipole moment and the normal boiling point of acetaldehyde (CH3CHO) are 2.7 D and 293 K, respectively. The dipole moment and the normal boiling point of n-octane (C8H18) are 0 D and 298 K.
if the half life of a certain radioactive element is 1,250 years what is the percent of atoms remaining after 7,500 years is ?
How much energy would be absorbed or re- leased by the H2O in the process 30 grams H2O(g) at 100?C → 30 grams H2O(l) at 20?C.
A buffered solution is made by adding 50.9 g NH4Cl to 1.00 L of a 0.75 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)
An equilibrium mixture in a 2.00 L vessel is found to contain 0.0406 mol CH3OH, 0.170 mol CO, and 0.302 mol H2 at 500 K. Calculate Kc at this temperature.
Compute ΔHo fusion and ΔSo fusion for this substance If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K..
Calculate the number of kilograms of helium required to inflate a balloon with a volume of 100.000 L at a pression of 250 mmHg and atmospheric temperature of -35 ° C.
a certain liquid has dH(vap)=26.0kJ/mol. calculate the q,w,dH and dU when 0.50 mol is vaporized at 250K and 750torr
A 357 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 625 mmHg. Calculate the moles of Ar present.
If 20.0 dm3 of methane, CH4, react with 200.0 dm3 of air at STP, calculate the dm3 of carbon dioxide gas produced.
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