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Question- Separation of a mixture of 49.7 g MgO and Al2O3 powders A consists of 2 equal parts.
For part 1 in 500 ml of HCl concentration x mol / l and stirring heated to the reaction completely. Carefully evaporating the mixture after the reaction, obtained 59.225 g anhydrous salt.
Part 2 in 750 ml of HCl x mol / l and conduct experiments as part 1 obtained 63.35 g anhydrous salt. Find x and the mass of each oxide in the mixture A.
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The Na+ ion is effectively inert. Given the availability of solution of A, B, and C, develops a simple procedure for identifying the salt that is present in your unknown.
Calculate the grams of solute needed to prepare each of the following solution. 5.5L of a 0.60M KCI solution.
Calculate the standard enthalphy change for the following reaction.
Problem- SrS has a face-centered cubic unit cell in which the S^2- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is the radius of Sr^2+ if the ionic radius of S^2- is 184.0 pm and density..
The total mass of the car plus sand is 85,000 . The hopper door is not fully closed so sand leaks out the bottom. After 18.0 minutes, 1.34×104 of sand has leaked out. Then what is the speed of the railroad car?
When 28.0 ml of 0.500 M H2SO4 is added to 28.0 ml of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the delta H of this reaction.
Reversible adiabatic processes are isentropic. Are isentropic processes necessarily reversible and adiabatic?
Question- An aspirin tablet weighing 0.445 g is dissolved in 28.1mL of water. The concentration of the aspirin in the solution is found to be 0.056 M. Calculate the % aspirin in the aspirin tablet.
When mercury (II) oxide is heated, it decomposes to form liquid mercury and oxygen gas according to the following balanced chemical equation:2HgO(s) ? 2Hg(l) + O2(g)
How much heat is required to raise the temperature of a 464g of lead from -20.0C to 219C
what is the pH of a solution made by mixing 30.00mL of .10M acetic acid with 40.00 mL 0f .10M KOH? Assume the volumes are additive and Ka=1.8*10^-5 for CH3CO2H
The equilibrium constant expression for the reaction 2BrF5(g) Br2(g) + 5F2(g) is A) Kc = [Br2] [F2] / [BrF5] D) Kc = [BrF5]2 / [Br2][F2]5 B) Kc = [Br2] [F2]5 / [BrF5]2 E) Kc = 2[BrF5]2 / ([Br2] × 5[F2]5) C) Kc = [Br2] [F2]2 / [BrF5]5
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