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A small crystal of I2 is often used to clean the surface of the magnesium metal in the syntheses of Grignard reagents. Write a balanced chemical equation for the reaction of magnesium and molecular
What is the overall cell reaction? What is the pH of the solution in the cathode compartment ofthe following cell if the measured cell potential at 25 oC is 0.55V?
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.
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 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
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
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
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).
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.
The fermentation of glucose, C6H12O6, produces ethyl alcohol,C2H5OH, and carbon dioxide. How many grams of glucose are needed to form 7.50 g of ethanol?
Given are the standard reduction potentials for the two half-reactions:Cr3+(aq) + 3e- ®Cr(s) E° = -0.74 V
1 L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3. Adding 10mL of 2M sodium hydroxide solution to 100mL of this buffer causes the pH to rise to 4.78. What is the total mola
How many mL of 010 M NaOH should the student add to20 mL 0.10 M HFor if she wished to prepare a buffer with a pH of3.4, the same as in Problem 4?
Under the standard conditions of 1 bar pressure and 298.15 K,the equilibrium constant Kp for a gas phase reaction is 5.30E-13.Calculate the value of the Gibbs free energy change G,std for this react
What are the spectatorions in the solution after the complete neutralization reactionoccurs when mixing the weak acid H2SO3 (aq)and the strong base, LiOH (aq)?
An expandable vessel contains 729 mL of gas at 22°C. What volume will the gas sample in the vessel have if it is placed in a boiling water bath (100.°C)?
Determine the molecularformula for ibuprofen, a common headache remedy. Analysis ofibuprofen yields a molae mass of 206 g/mol and a percent composition of 75.7% C, 8.80% H and 15.5% O
How do you convert the wave functions for the 3s,3p,3d orbitals of Hydrogen, so that they can be entered into excel? In what form can the software recognize them?