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A copper wire of length 1.317m and diameter 3.26 x 10-4 m is blackened and placed along the axis of an evacuated glass tube.
The wire is connected to a battery, a rheostat, an ammeter, and a voltmeter, and the current is increased until, at the moment the wire is about to melt, the ammeter reads 12.8A and the voltmeter reads 20.2 V.
Assuming that all the energy supplied was radiated and that the radiation from the glass tube is negligible, calculate the melting temperature of copper.
Determine the mass, of: a.30.0 mL of the liquid propylene glycol, a moisturizing agent for foods,
Will a racemix mixture of isoborneol be produced in the reduction of camphor to isoborneol?
A galvanic cell has an iron electrode in contact with 0.11 M FeSO4 and a copper electrode in contact with a CuSO4 solution.
at 85 c the vaper pressure of a is 566 torr and that b is 250. caculate the composition of a mixture of a and b that
Hexane and cyclohexane for an ideal solution. the vapor pressure of hexane is 151 torr and that of cyclohexane is 98 torr at 25C. calculate the vapor pressure of each of the following solutions and teh mole fraction of each of teh substance in the..
benzene and toluene form a nearly ideal solution. if the vaporpressure for benzene and toluene at 25 degrees celsius is
calculate the final pressure and the number of moles of H2 in each flask
An ancient club is found that contains 170 g of pure carbon and has an activity of 7.5 decays per second. Determine its age assuming that in living trees the ratio of14C/12C atoms is about 1.30 × 10-12.
In photosynthesis, plants from glucose (C6H12O6) and oxygen from carbon dioxide and water, Part B, Calculate delta H rxn at 15 degree C
When 2.150 g of AX (s) dissolves in 200.0 g of water in a coffee-cup calorimeter the temperature rises from 21.2 oC to 32.3 oC. Calculate the enthalpy change (in kJ/mol) for the solution process AX (s) --> A+ (aq) + X- (aq) Assumptions for this calcu..
Write orbital diagrams to represent the electron configuration of carbon before sp3 hybridization
A gaseous fuel mixture stored at 748 mmHg and 298 K contains only methane CH4 and propane C3 H8. When 11.2 L of this fuel mixture is burned, it produces 769 kJ of heat. What is the mole fraction of methane in the mixture
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