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Iron ore is impure Fe2O3. While Fe2O3 is heated with an excess of carbon, iron metal is produced. As of a sample of ore weighing 812kg, 486kg of pure iron is obtained. Presuming that the % yield is 100%, explain what is the % Fe2O3 by mass in the ore sample?
1. the analysis of a compound gives it composition as 31.6k 29.3cccl and 39.1 oxygen . determine the empirical formula
A 14.7-g ice cube is placed into 324 g of water. Calculate the temperature change in the water upon complete melting of the ice. Determine how much heat is absorbed by the melting ice and then use q = mC?T to calculate the temperature change of the..
Compute the number of grams of H 2 SO 4 in 1 gallon of battery acid if the solution is 38.9% sulfuric acid by mass and has a density of 1.33g/mL ?
1. suppose you were given a sample of iodine crystals a sample ofantimony and a sample of mixture of iodine and
Draw any one of the skeletal structure of a secondary alkyl bromide with a molecular formula C6H13Br and two stereogenic centers.
Helium gas, at constant pressure of 1.6 atm, expands in volume from 25.7 L to 86.3 L. The temperature is held at 357 K. Calculate the work done by the gas(in joules).
A beam of electrons is incident on a gas of hydrogen. What minimum speed must the electrons have to cause the emission of 656 nm light from the 3 to 2 transition of hydrogen? Through what pontetial difference must the electrons be accelerated to h..
Iron reacts with chlorine gas as follows: 2 Fe (s) + 3 Cl2 (g) > 2 FeCl3 (s)
Consider a 53.5 g sample of H2O(g) at 117°C. What phase or phases are present when 134 kJ of energy is removed from this sample.
if the average person weighs seventy kilogramsnbsp andnbsp if each alpha particle depositsnbsp of energynbsp of
Solution B is made by taking 15.0mL of solution A and diluting it to 100.00 mL. If solution B is found to contain 55.0ppb CU++, 63.546g/mol, what is the concentration of copper in solution A
General Chemistry: Energy, Volume, Mass, Molarity, and Moles, Benzene is an organic solvent with the formula C6H6. It boils at 80.1 degrees celcius and melts at 5.5 degrees Celsius. Benzene's density is 0.88gm/ml; its heat of vaporization is 30.0 ..
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