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An iron ore sample is a mixture of Fe2O3 and several impurities. A 752. g sample of the impure iron ore is heated with excess carbon. Only the Fe2O3 present in the ore reacts with the carbon producing 341. g of carbon monoxide by the following reaction. What is the mass percentage of Fe2O3 in the impure iron ore sample?Fe2O3 + 3C→ 2Fe + 3CO
When ethane C2H6 rea cts with chlorine Cl2 the main product is C2H5Cl but other products containing Cl such as C2H4Cl2 are also obtained in small quantities.
In combustion analysis, 2.00mg of vitamin C yielded 3.00mg CO2 and 0.816mg H2o. From mass spectrometry, it was found that the molecular weight of vitamin C is 176amu. Determine the mass composition of vitamin C, its empirical formula, and its molecul..
The average radius of a molecule of lysozyme, an enzyme in tears is 1430pm,what is the radius in nanometers.
Using a solution of KMnO 4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
Determine the amount of heat energy is needed to raise the temperature of 0.362 kilograms of Cu from 23. Degree Celsius to 60 degree Celsius?
Calculate What will be the volume of this gas sample at standard atmospheric pressure and
Determine the volume of the gas at a pressure of 150.0 kPa and a 26 degree Celsius of temperature?
Compute the pH if NaOH solution of the 10.00 mL has been mixed. pKa of HCOOH = 3.74
Determine the pH of the solution resulting from the combination of 40.0 mL of 0.200 M Perchloric acid and what is the mass in mg
A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g NaOH.
If C 6 H 12 O 6 yields C 2 H 5 OH+CO 2 then balance this equation and determine what the percent yield for the reaction is if 575.0 grams of C 6 H 12 O 6 glucose yields 126.4mL of C 2 H 5 OH ethanol?
A 100 mm diameter silicon wafer is oxidized completely. What is the thickness of the resulting SiO2 wafer? The molecular weight of Si is 28 g/mol and of SiO2 is 60 g/mol.
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