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1) A 100-W light bulb in a receptacle is supplied with electricity by a residential 120-V circuit. This light bulb draws 0.833 A of current while it is on. Calculate the resistance of the light bulb.
2) A family uses an electric frying pan with a power raing of 1.20 x 10^3 W. Although the pan is thermostatically controlled, its element was drawing power for 6.30 x 10^2 min in a period of one month. Calculate the electrical energy in kWh used by the pan during the month.
Photographers use a rule of thumb that a 10 degree Celsius rise in temperature cuts development time in half, to determine how to modify film development time as the temperature varies. a) Calculate the activation energy for the chemistry of film d..
An unknown protein (i.e., not BSA) binds to Carboxy Methyl (CM) -cellulose (pKa 4) at pH 7.0. Draw the two structural forms of the CM functional group
Write the mechanism for the formation of 4-chlorobenzanilide from the combination of the following reagents:
Problem- Greenhouse gasses have dipole moments. for each structure listed, draw the lewis structure and show the direction of the dipole moment if there is one AND direction of the bond moment.
Explain how many grams of sucrose must be added to 500.g of water at 100C to change the vapor pressure to 752mm Hg? It says the answer is 101 grams
An X-ray has a wavelength 1.44A. Calculate the energy in J of one photon of this radiation.
Calculate a) the amount of ethylene glycol required. b) the amount of by product evolved and c) the amount of polyester produced.
Problem- Electrolysis of a molten metal chloride (MCl3) using a current of 6.48 A for 1500 seconds deposits 1.51g of the metal at the electrode. a) What is this metal?
The amino acid Histidine has a side chain for which the pKa is 6.00. Calculate what fraction of the Histidine side chain will carry a positive charge at pH 7.5
Problem- The student then emptied the flask and dired it once again. To the empty flask he added pieces of a metal until the flask was bout half full. He weighed the stoppered flask containing the metal and found that its mass was 100.356g.
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.
You conbine 16.0g of KO2 with the CO2 in 4.00L tank, in which the gas pressure is 1.24 atm at 23.0C. What is the pressure of the oxygen formed if captured in 2.50L flask at 25.0C
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