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A solid sample containing some Fe^2+ ion weighs 1.062 g. It requires 24.12 mL 0.01562 m KNno4 to titrate Fe^2+ in the dissolved sample to a pink end point
5 Fe2+ + MnO4-+ 8H+ = 5 Fe3+ + Mn2+ + 4 H2O
a) moles MnO4- = 0.03644 L x 0.0244 M= 0.000899
b) moles Fe2+ = 5 x 0.000899= 0.00450
c)How many grams of iron are there in the sample?
d) What is the precent of Fe in the sample
The reaction of benzanilide with Cl2in acetic acid yields a mixture of 2 monochloro derivatives formed by electrophilic aromatic substitution.
list all possible products of acetaldehyde (ethanal) was reacted with acetone in an aldol condensation
Starting with standard reduction potentials calculate the values of e cell and delta g of the following reactions:
What is the density of lead if a rectangular bar measuring 0.500 in height, 1.55 in width, and 25.00 in length has a mass of 220.9g.
Calculate the mass of silver chloride required to plate 135 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag.
when 2.0g of an electolyte was dissolved in 25.0g water, the resulting solution was found to have a molairy of 0.815M and a molality of 0.800m. a) find the molecular weight of the electolyte.
Explain in detail the observed absorption maxima (from the UV-vis spectrum) for the following compounds:
a solution contains 4.00g NaOH, 5.61g KOH, and 1.03g RbOH in 90.0g of H2O. The solution has density of 1.08g/mL. What is the molality of OH?
A solution is prepared by mixing 13.00ml of 0.0021M (aq) Hg2(NO3)2 with 25.0ml of 0.015M HCl. Assume that volumes are additive.
If the total pressure is 1.8 atm, what is the partial pressure of ethanol?
Glucose is pumped into some animal cells by a symporter powered by simultaneous entry of Na+. The entry of Na+ provides a free-energy input of 10.8 kJ/mol under typical cellular conditions (external [Na+] = 143 mM, internal [Na+] =14 mM
A solution containing 80 g of KCl in 200 g of water at 50 0 C is cooled to 20 0C, a) How many grams of KCl remained in solution at 20 0C and b) How many grams of KCl crystallized out
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