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If 250mL of methane, CH4 effuses through a small hole in 48 s, the time necessary for the same volume of helium to pass through the hole will be?
A voltaic cell consists of a standard H2 electrode in one half-cell and a Cu/Cu2+ half-cell. Calculate [Cu2+] when Ecell is 0.25 V
a backpacker wants to carry enough fuel to heat 2.9 kg of water from 27 degrees c to 100.0 degrees c. if the fuel he
Calculate the pH in a solution prepared by dissolving 0.08 mol of solid NH4CL in 0.450 L of 0.35 M NH_3. Assume that there is no volume change.
how many square meters of floor space are there in a room which has 225.0 square yard of floor space 1 m=39.37 in, 1 yard =36 in.
The Ksp value for ferrous hydroxide is 1.6 x 10/\-14. Calculate the molar concentration of ferrous ion (Fe2+) in an aqueous solution that has been buffered to maintain a pH of exactly 10.00 and is saturated with Fe(OH)2.
What will the temperature be when the ice cube has just melted. Use 4.184 J/K*g for the specific heat capacity of ice and water. If the water is then heated to 80 degrees C by burning methane (delta H= =890.31 kJ/mol) how many grams of methane wou..
Compute the pH during the titration of 30.00 ml of 0.1000 M KOH with 0.1000 M HBr solution after the subsequent additions of acid.
a 5.00 g sample of aluminum pellets specific heat capacity 0.89 jc g and a 10.00 g sample of iron pellets specific
A blast furnace is the main unit in the production of iron from iron ore. One can view the blast furnace as a process in which the principal desired reaction is:
The zinc content of a 1.23 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH. Zn+2HCl-->ZnCl2+H2
Calculate the density of a sphere that has a circumference of 2.00 inches and weighs 100.0 gms. (c = 2pi r) (V = 4/3pi r^3)
A mixture is formed from 5.0 mol of liquid benzene and 5.0 mol of liquid toluene at 25 oC and 1 atm. Assume that the mixture is ideal. Use ?Gof (benzene,l) = 90.0 kJ/mol, ?Gof (toluene,l) = 100.0 kJ/mol,
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