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The solution gradually turned from green to light blue during the addition of the first 3 mL of ethylene diamine solution. It remained light blue until 6 mL when it suddenly became blue.
It remained blue to 12 mL when it suddenly changed to dark blue. It steadily became darker until 17 mL when it suddenly became purple.
A. How many moles of ethylene diamine were added to reach the light blue to blue color change? ________________ mol C2N2H8
How does this compare to the initial moles of NiCl2*6H2O? ( 0.036 mol of NiCl2*6H2O are present at the start of the reaction)
Is there excess (unreacted) ethylene diamine or nickel compound?
What is the formula of the nickel containing compound at this point in the reaction?
A solution of 0.18 mol of the chloride salt of protonated atropine (AH^+), a weak organic base, in 1.0 L of solution has pH = 5.20.
Compute the number of mol of S represented by 1.810 x 10 -27 atoms of S, also determine the number of atoms of sulfur in 5.22 x 10 -7 kilograms of sulfur.
a gasoline additive used to boost octane ratings, delta H f has = -313.6 kJ/mol. C5H12O (l) + 15/2 O2 (g) ---> 5Co2 (g) + 6 H2O (l) Calculate its standard heat of combustion in kilojoules.
how many liters of H2 would be formed at 528 mm Hg and 12 degrees celcius if 28.0g of zinc was allowed to react
Draw the molecule by placing atoms on the grid and connecting them with bonds. If there is more than one answer, draw all o
Question- Propose a reasonable reaction mechanism for the sodium hypochlorite oxidation of 3-heptanol. Give the IUPAC name of the expected product. What other oxidizing agents may be used to carry out this oxidation?
Question- Using the recessed bond and protruding bonds, as well as two regular straight-line bonds, draw both mirror images of fluorochlorobromomethane.
Determine the ionization energy of a hydrogen atom (in kJ/mol) if the electron is in its ground state. (Hints: Use the Rydberg equation, remember E=hc for a single H atom, and R=109678x10-2nm-1)
The equivalence point in the titration is reached after the addition of 25.51 mL of 0.2454 M sodium hydroxide to the sample of the unknown acid.
The monthly average rainfall data (assumed to fall evenly over the whole watershed of 18 square miles) is as given below. The rainfall pattern repeats every year. The runoff from the land area of the watershed into the lake is 45% of the precipita..
A 15.0 mg sample of a protein is dissolved in water to make 27.0 ml of solution. The osmotic pressure of the solution is 0.56 torr at 25 C. What is the molar mass of the protein?
Problem- The molecular weight of methyl benzoate is 136.16 g/mol and the molecular weight of the product is 181.15 g/mol. Assume you have excess acid and you start off with 2.8 g of methyl benzoate. What is the theoretical yield in grams of methyl..
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