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A 8.0 ohm and a 4.0ohm resistor are connected in parallel to a 12Vbattery. (a) What is the current in in the circuit? (b) What is the voltage drop across each resistor? (c) What is the power dissipated by each resistor?
What volume (in liters) of 1.10 M KOH solution should be added to a 0.090 L solution containing 10.2 g of glutamic acid hydrochloride (Glu, FW=183.59
The internuclear distances in gas-phase ionic molecules are considerably smaller than those in the corresponding crystals.For exemple,
the pka of benzoic acid and 4-nitroanilinium hydrochloride are 4.2 and 1.0 respectively.a. determine the keq for the
Calculate the amounts of Na2HPO4 and NaH2PO4 (in grams) needed to prepare 200 mL of a buffer with pH = 8.25 so that the sum of concentrations
calculate the amount of energy required in calories to heat 145g of h2o from 22.3 degrees c to 75.0 degrees c.
What is the mass of air in the cylinder? What is the temperature in the cylinder when the volume reaches 4.00 in3?
Commercially, compressed oxygen is sold in metal cylinders. If a 120-L cylinder is filled with oxygen to a pressure of 132 atm at 22 degree Celsius, what is the mass (in grams) of O2 present? how many liters of O2 gas at 1.00 atm and 22 degrees Cel..
How would the absorbance of a NaSCN have been affected if .30 M Fe(NO3)3 had been used in place of .20 M? (In the case that the reaction has been completely driven to FeSCN2+
a 25ml sample taken from saturated solution of caoh2 required 36.0ml of 0.100m hcl to titrate. calculate the
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
The heat of fusion is 4.6 kJ/mol and the heat of vaporization is 46.0 kJ/mol. Finally, the specific heats of the solid, liquid and gas are, respectively 2.1, 3.2 and 1.8 J/g oC.
Calculate the heat of solution (i.e., delta H of solution)of ammonium nitrate in kJ/mol. Assume that the energy exchange involved only the solution and that the specific heat of the solution is 4.18 J/g. deg.
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