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A solution contains Chromium,Cr3+ ion and Magnesium Mg2+ ion. The addition of one litre of 1.55M Sodium fluoride solution is needed to cause the complete precipitation of these ions as Chromium fluorideCrF3(s) and MgF2 (s). Determine the mass of Cr3+ in the original solution if The total mass of the precipitate = 49.6 .
Give Structures- Indentify unknown organic liquids, An unknown organic liquid, A, was found to burn with yellow, sooty flame and give a positive Lucas test (about 5 min). Upon treatment with sodium dichromate-sulfuric acid solution it produced Comp..
spontaneous at high temperature or spontaneous at low temperature. (a) The temperature of a sample of Co(s) is lowered from 60°C to 25°C. (b) Ethyl alcohol evaporates from a beaker.
What is the mass of a piece of magnesium wire which produces 39.30 mL of hydrogen gas collected over water at 23 degrees celsius
The solution's boiling temperature is 103.25 degrees celsius. What is the molar mass of this molecular compound?
If the titration of a 25 mL sample of calcium hydroxide requires 34.45 mL of a 0.100 M HCl, what is the molarity of the base. 1. Determine the conjugate acid-base pairs in each of the following reactions:
A 16.0-mL sample of an unknown HClO4 solution requires titration with 25.5mL of 0.210M NaOH to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction
Write the balanced formula unit equation for the reaction of dinitrogen pentoxide, N2O5, with water to form an acid. What is the sum of the coefficients in the balanced equation?
what is the percentage protonation of the solute and calculate the ph of the solute in an aqueous solution of 0.611 m
Explain the large disparity in the numerical results pf Part (a). Discuss the advantages and disadvantages of the three energy sources.
How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 7.48 to 5.90? Use E notation and 3 significant figures.
What is the mass of a rectangular piece of copper 24.4cm x 11.4cm x 6.6cm? The density of copper is 8.92 g/cm^3.
If 45.8 grams of aluminum metal are reacted with excess HCl, what volume of H2 gas would be generated at 23.0 ºC and 1.00 atm pressure?
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