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Describe the relative concentrations of Cu2+(aq) must be used to construct a concentration cell with a cell potential of 0.055 V based on two Cu electrodes an Cu2+(aq) solutions.
When you draw the Lewis structure, how do you know where the plus and minus signs go. For example, [CH3OH2]+.
Starting with 1.00 × 1020 molecules of reactant at time t = 0, a first-order reaction has a half-life of 20.0 minutes. Determine the number of molecules remain un-reacted after 100.0
Automobile batteries contain sulfuric acid, referred to as "battery acid." If the solution has a density of 1.28 g/mL and is 38.1 sulfuric acid by mass, determine the number of grams of sul
Julius Caesar expired, Julius Caesars exhalation had a volume of 500cm3 and contained 1 mole percent argon when the Julius Caesar. Suppose that P=1 atm and the T=300 K at the location of his demi
A cylindrical rod produced from silicon (having the density 2.33 g/cm3) is 16.8 cm long and has a mass of 21.7 kg. Calculate the diameter of the cylinder?
If borax solution takes 0.76mL of 3M H2SO4 to neutralize a 10mLsample of Borax, Determine the concentration of borax solution (mol/L).
When volume does the mixture contain now? At 60C when the percent relative humidity is defined as %RH=PH2O/P* H2O where the P H2Ois the partial pressure of water in sample and the P*H2O=0.197 atm
CFCs , Chlorofluorocarbons are no longer used as refrigerants because they help destroy the ozone layer. Tri-chlorofluoromethan (CCl3F) boils at 23.8 degrees C and its molar heat of vaporization is 2
This is an example of a worm-like-chain (WLC) model, where lp is persistence length and L is the contour length and kB is Boltzmann's constant.
In sodium fluoride the mass ratio of sodium to fluorine is 1.21:1.A sample of sodium fluoride formed 27.6 g of sodium upon decomposition. Determine how much fluorine was formed?
In order to raise the temperature 1.50 oC how much solar energy in kJ would have to be transferred to a 55.0 meter length of asphalt highway that is 15.0meter wide and 20.4 centimeters?
The objects volume is calculated by displacement of water in a100mL measuring cylinder and an unknown object has a mass of 38.533g. Before the object is immersed the volume reading is 52.4mL, and af
To find the mass of a metal object to be 27.02 g, a student used a triple beam balance (accurate to 0.01g) and then used a 50mLgraduated cylinder to calculate the volume of the object was 19mL.
At 119.0 (centigrade's) to water at the 39.0 How much heat in kJ must be removed in order to change 3.36 moles of steam .The specific heat capacity of water vapor is 2.01 J g-1 oC-1
Determine the total work done, the total heat transfer as well as enthalpy changes and the internal energy for the process.
Torque is calculated in foot-pounds where the pounds means pounds of force that the force exerted by 1 pound under normal gravitational acceleration. Calculate what the SI units of torque are, and
When given a substance (like CCl4 orI2), Calculate the easiest way to conclude if the substance has London dispersion intermolecular forces?
The average molecular weight of a nucleotide pair is 660 g/mol and each nucleotide pair contributes 0.34 nm to the length of DNA. The molecular weight of an E coli DNA molecule is about 3.1 X109&nbs
Calculate the pH at the half-equivalence point where a solution having an unknown concentration of benzoic acid (Ka= 6.5x 10-5) is titrated using a standardized solution of sodium hydroxide.
Blood pressure is equivalent to the pressure under mercury of a particular depth and it is measured in millimeters of mercury. For example, a systolic pressure of 160 is actually equal to the pressu
Recognize the acid and the number of equivalents per mole and do the same for the base. Balance the following acid-base neutralization reaction. FeCl3 (Ferric chloride) reacts with NaHCO3(sodium bi
Determine the percentage change in your weight as you move from the North Pole, where g = 9.789 m/s2, where g = 9.832 m/s2 to the Equator.
Calculate the difference in potential energy of a mercury atom among the top and bottom of a column of mercury in a barometer when the pressure is 1.0 atm?
A solution having an unknown concentration of benzoic acid, Ka=6.5 x 10-5 is titrated using a standard solution of sodium hydroxide. Outline the titration curve, labeling the equivalence and half equ