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A 10g block with a charge of 8*10^-5 C is placed in an electric field E = (3000i-600j) N/C What are the magnitude and direction of the electrostatic forces on the block (relative to the positive dir
The U.S. space program has supported extensive research to developfuel cells. The early space missions used a fuel cell based on there action of hydrogen and oxygen to form water :
Calculate the modulus of elasticity (in GPa) for the nonporousmaterial. At what volume fraction porosity will the modulus of elasticity be 278 GPa?
The emission line used for zinc determinations in atomic emissionspectroscopy is 214 nm. If there are 6.00×1010atoms of zinc emitting light in the instrument flame at any giveninstant.
Normal atmospheric pressure is 1.013 x 105 Pa. The approach of a storm causes the height of a mercury barometer to drop by 12.3 mm from the normal height. What is the atmospheric pressure? (The dens
Is it possible for some of the aldehyde to not have reacted and beseen in the product mixture? Or does the reaction exclusively yieldan alcohol and a carboxylic acid? What happens if you also see an
A solid sphere of brass (bulk modulus of 1.40 x 1011 N/m2) with a diameter of 4.00 m is thrown into the ocean. By how much does the diameter of the sphere decrease as it sinks to a depth of 2.1 km?
An electron is accelerated by a constant electric field of magnitude 305 N/C. (a) Find the acceleration of the electron.
A jewerly manufacturer is going to silver plate copper necklacesusing a solution of Ag(CN)2- ions. If eachnecklace has a volume of 2.10 × 10-3cm3, how many necklaces can be silver plated in
The average density of the planet Uranus is 1.27*103kg/m3. The ratio of the mass of Neptune to that of Uranus is 1.19. The ratio of the radius of Neptune to that of Uranus is 0.969. Find the average
A tube is open at only at one end. A certain harmonic produced by the tube has a frequency of 465 Hz. The next higher harmonic has a frequency of 598 Hz. The speed of sound in air is 343 m/s.
If the experiment were repeated using the same mass of benzoicacid and a 50 mL volumetric flask instead of a 100 mL volumetric flask, how many milliliters of 0.0989 M NaOH would berequired to titrat
How close to the film should the lens be placed to form a sharp image of an object that is 6.0 away? What is the magnification of the image on the film?
While exploring the projectiles from Newton's Mountain, is it possible to launch a projectile with just enough velocity to have it land on the Earth betwen points A and B?
The tetraethyl lead Pb(C2H5)4 in a25.00 mL sample of aviation gasoline was shaken with 15.00 mL of0.02177 M I2. (Hint: one mole of I2 reactswith one mole of the tetraethyl lead).
If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95C in a 245 ml container calculate the molecular weight of this unknown gas?
The thermite reaction is a very exothermic reaction; it has been used to produce liquid iron for welding. A mixture of 2 mol of powdered aluminum metal and 1 mol of iron(III) oxide yields liquidiron
A sample of gold with a mass of 197 grams is made up of 6.02 x10^23 atoms. What is the mass of just one atom of gold?
Write this net ionic equation as a molecular equation, showing allreactants and products as compounds. Then rewrite this samenet ionic equation as a total ionic equation showing all cationsand anion
An airplane, diving at an angle of 54° with the vertical, releases a projectile at an altitude of 770 m. The projectile hits the ground 3.50 s after being released. What is the speed of the airc
Find that frequency and the tension in the wire. (Use any variable or symbol stated above along with the following as necessary: vs for the speed of sound.)
A sample of helium has a volume of 325 mL and a pressure of 655 mm Hg. What will be the pressure if the helium is compressed to 125 mL( T constant).
The tube on the right has cross-sectional area A' = A/2. If the net force on the tube assembly is zero, what must be the speed v' of the water flowing through the tube on the right? Neglect gravity,
Calculate the concentration of I- in a solution obtained byshaking 0.19M KI with an excess of AgCl(s)? how do you do this problem??
Benzene is often produced as a by-product during the synthesis of phenylmagnesium bromide. How can its formation be explained? Write a balanced chemical equation for the formation of benzene.