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Two resistors of resistances 6 Ω and 12 Ω are connected in parallel across a 6 V battery. What is the equivalent resistance and total current in the circuit?
Three resistors of resistances 2 Ω, 4 Ω, and 6 Ω are connected in parallel across a 12 V battery. What is the total current in the circuit?
When a small amount of hexanoic acid [CH3(CH2)4CO2H, pKa~4.8], isadded to a separatory funnel which contains the organic solvent diethylether and water with a pH of 2.0, it is found mainly in the __________phase as _
Assume that the system benzene and chlorobenze at 100 degree celcius obeys Raoult's law. for a binary mixture with an overall mole fraction Z=.30 determine
1.91 g H2 is allowed to react with 10.2 g N2, producing 1.17 g NH3. (a) What is the theoretical yield for this reaction under the given conditions. (b) What is the percent yield for this reaction under the given conditions
What is the mole fraction of helium, XHe, in a gaseous mixture of He and Ar for which the average molar mass is found to be 8.75g/mol
A generic salt AB2 has a molar mass of 207g/mol and a solubility of 8.80 g/L at 25C. What is the Ksp of the salt
A 250g sample of gaseous Cl2O7 is placed in a 4.00L flask at 25 degrees C and begins to decompose. When equilibrium is established, the pressure of oxygen is 6500 mm. Calculate the total pressure in the flask at equilibrium and the Kp value.
Calculate the number of moles of B at each time in the table. 0 s mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s m..
Calculate the mass of KI in grams required to prepare 5.00x10^ 2mL of 3.2 M solution.
Problem- What would happen if you heated (Isopentyl acetate) ester with NaOH solution. what would you expect to observe
The density of acetic acid vapor at the normal boiling point, 118.5 degrees C, is given by 3.15 g/L (normal boiling point is the boiling temperature at P = 1 atm). a) calculate the fraction of the vapor that is monomer and the fraction that is dime..
Suppose you have 35.00 mL of phosphoric acid, and you do not know what it's concentration is. If you titrated it with a 0.733 M potassium hydroxide solution, and it took 42.50 mL of the base to neutralize the acid. what was the concentration of the p..
Problem- A 6.72 g sample of a salt is dissolved in 100.0 g water, in a constant pressure calorimeter. The initial temperature of the water is 21.50 oC, and the final temperature was 18.63 oC. Calculate the heat of solvation for the salt, as J/g. I..
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