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A chemist ignites a candle and completely burns 4.02 g of akind of wax (C23H48)
a) How many molecules of O2 are used to burn up all thewax?
b) What mass of liqid water is produced when the waxburns?
c) What volume od CO2g is produces if the reaction occurs atstp?
A sample of molten iron occupies a volume of 7.11 x 10-3 L. If the density of iron is 7.86 g/cm3, what is the mass of iron in grams in the sample?
The resulting solution is titrated to a starch endpoint with 34.81 mL of the thiosulfate solution. Calculate the concentration of the thiosulfate solution.
If the sign for delta G is negative (spontaneous process) and the sign for delta S is positive (more disorder) for both dissolving processes, how could one be endothermic (positive delta H) and one be exothermic
1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCl solution. the excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization.
Methane and hydrogen sulfide form when 36g H2 reacts with carbon disulfide. calculate the percent yield if the actual yield of CH4 is 69.8 g
if 100 mL of 0.800 M Na2SO4 is added to 200 mL of 1.20 M NaCl, what is the concentration of Na ions in the final solution?
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 5 state to the n = 3 state
a mixture of carbon monoxide co carbon dioxide co2 and oxygen o2 is contained within a 275 ml flask at the temperature
The cuvette used had a 1.00 cm sample pathlength. The measured absorbance was 0.180. What was the concentration of hemoglobin in the solution
What is the final temperature of the mixture if the heat of acid-base neutralization (?Hneut) = ?57 kJ per mole of H2O formed
Another way to reduce an aldehyde is with H2/ a metal surface . would this be an appropriate mehod to use to reduce cinnamaldehyde?
The lid is tightly sealed on a rigid flask containing 3.50 L H2 at 17 °C and 0.913 atm. If the flask is heated to 71 °C, what is the pressure in the flask?
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