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Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber, what is the area (in m2) of the leaf
Propose a mechanism to account for the formation of a cyclic acetal from 4-hydroxypentanal and one equivalent of methanol
A 29? and a 41? resistor are in series, Find the current when this series combination is connected across a 12V battery
Titration of an oxalate sample gave the following percentages of percent oxalate: 12.28%, 12.54%, and 12.24%. Calculate the average and the standard deviation.
Calculate the Standard deviation and the relative standard deviation of these analyses. Calculate the 95% confidence limits for the mean of this data. show the calculation process
A juggling bag is thrown straight up into the air and is caught 3 s later, What is the initial velocity of the bag
If 27.0 mL of 0.0200 M KMnO4 were required to titrate a 0.425 g sample of K3[Fe(C2O4)3] * 3H2O, what is the % purity of the complex?
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 70 kg and exert average forces of 1350 N horizontally, What is the acceleration of the two team
In the reaction AH3 +H+ = AH4+, AH3 has a dipole moment and AH4+ does not. Predict the number of lone pairs that may exist on A in AH3. Hint: Find more than a single number of lone pairs that work.
An unknown nuclide decays by elimination of 2 alpha particles followed by a positron. Bombarding this decay product with a 6Li nucleide creates the single nuclide Pb-207. What was the origional nucl
The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 86,000 N. What is the average difference in the air pressure
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of H2O will be: H2O2(aq) + ClO2(aq) --> ClO2-(aq) + O2(g)
An airplane with a speed of 76.6 m/s is climbing upward at an angle of 49.5 ° with respect to the horizontal, Relative to the ground, determine the angle of the velocity vector of the package jus
What is the pH of the solution after 50.0 mL of base has been added? What is the pH of the solution at the equivalence point
How many grams of dry NH4CL need to be added to 2.30 L of a 0.400 M solution of ammonia,NH_3 , to prepare a buffer solution that has a pH of 8.53? Kb for ammonia is 1.8*10^-5.
In one frame of reference(say H), two events occur at the same point in space, but are separated by a time interval of 100 nanoseconds
Predict the magnetic susceptibilities (para- or diamagnetic) and determine the number of unpaired electrons of each of the following complexes (consider C2O42- and H2O as strong field ligands which
air traffic controllers usually describe the position of an aircraft relative to the airport by altitude, What are the x, y, and z components (in meters) of hte position vector
a buffer solution is prepred by adding 5.50g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155mL of solution a) What is the pH of the buffer
1. A modern-day zeppelin holds 8,280 m3 of helium, Compute its maximum payload at sea level
A buffer may be prepared by mixing a weak acid with a roughly equivalent amount of strong base. Which of the acids below is best for the preparation of a buffer with a pH of 4.00
Draw the circuit with the following criteria; double acting cylinder used for broaching holes into metal plates. The cylinder is 24" long mounted vertically, What is the minimum horsepower required
3-bromo- 1-butene and 1-bromo-2-butene undergo sN1 reaction at nearly the same rate even though one is a secondary halid and the other is primary why
A beaker with 1.60×10^2 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100M . A student adds 5.90 mL
Three point charges are arranged along the x axis. Charge q1=-4 nC is located at x=0.240m and charge q2=2.10 nC is at x=-0.350m, What is the direction of the net force on q3