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The chromium d = 7.10 g/cm3 plated on a 9.75-cm2 surface was dissolved with HCL and diluted to 100.00mL. A 25.00-mL aliquot was buffered to pH 5 and 50.00mL of 0.00862 M EDTA was added. Titration of the surplus chelating reagent required 7.36mL of 0.01044 M Zn2+. Compute the average thickness of the chromium plating.
It is well known that the element magnesium has three naturally occurring isotopes. Mg-24 represents 79.0% of all magnesium atoms, Mg-25 accounts for 10.0%, and Mg-26 is the remaining 11.0%.
what is the pH of 1.0 L of a buffer that is .11M HNO2 and .150M NaNO2. what is the pH of the buffer after adding 1.0 mL of 12M HCl. pH of original buffer
Multiple choice questions in Nuclear reactions - make nuclear fission more efficient, which device is used in a nuclear reactor to slow the speed
determine the empirical formula of a compound having the following percent composition by mass k
The solution of iron (III) chloride used in this experiment is 0.02M. Determine the amount of iron (III) chloride hexahrdrate
A colored substance Z has an absorption maximum at 350 nm. A solution containing 2 mg of Z per liter had an absorbance of 0.850 using a 1 cm cell. The formula weight of Z is 148.
Define Carborundum (SiC) is a hard substance made by combining silicon dioxide with carbon(C) as follows- SiO2(s)+3C(s) = SiC(s) + 2CO(g). Define what mass of SiC is formed from the complete reaction of 4.8 mol of carbon
A hydrated compound contains 1 mole of cation M, 3 mole of anion A, and 2 moles of water. The correct formula is
Chemists often use molarity ,M in Moles/liter , to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure
The enthalpy of formation of water is -241.8 kJ/mol. Explain how much heat is released while 1g of hydrogen reacts with excess oxygen to form water
Heat is now added until the water reaches a saturated vapor state. Find the initial volume, final pressure, work, and heat transfer. Any help would be appreciated, thanks in advance.
The distance between layers in a crystal is 323 pm. X rays are diffracted from these layers at an angle of 13.1°. Assuming that n = 3, calculate the wavelength of the X rays in nm.
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