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The combustion of 135mg of a hydrocarbon produces 440mg of CO2 and 135mg of of H2O. The molar mass of the hydrocarbon is 270 g/mol. Determine the molecular formula of this compound ?
The evaporation of water H2O(l) ->H2O(g) is endothermic: Change in T degree +44.01 kJ Determine the minimum mass of water (in ) has to evaporate to absorb 183 joules of heat?
How many seconds are required to produce 4.94 mg of chromium metal from an acidic solution of potassium dichromate, using a current of 0.234 A?
consider the reaction CO2+H2=CO+H2O.The equilibrium concentrations are [CO]= 0.050M, [H2]=0.045M, [CO2]=0.086M, and [H2O]= 0.040M. Calculate K .
A zero-order reaction has a constant rate of 2.40×10-4 M/rm s. If after 80.0 seconds the concentration has dropped to 7.00×10-2 M,
Determine How many moles each are in 1.30L of the saline solution if a physiological saline solution contains 174mEq/L each of Na+ and Cl - .
if 40.0 kJ of energy is absorbed by 500.0 g of water at 10.0 degrees celcius what is the final temperature of water?
Given the following data H Cl bond enthalpy = +431 kJ/mol, ?Hf HCl(g) = -92.31 kJ/mol
The vapor pressure of br2(l) at 25C is 228 mm hg. if 2.00g of br2 is usedm what is the final pressure in the flask? will there be liquid in the flask.
If a sample of barium contains 2.3 x 1023 atoms of barium, how many grams of barium are in the sample?
Three gases (8.00 of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 degrees C, the total pressure in the container is 3.70 atm.
What is molarity of NaOH solution if 26.0ml of 0.380 M H2So4 solution is required to neutralize a 25.0ml sample of the NaOH solution
A water skier is pulled by a net force of 135 N and has an acceleration of 1.8 m/s2. What is the mass of the skier.
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