The diagram shows twometals, A and B, which melt at1000°C and 1400°C. State theweight percentage of theprimary constituent (grains ofC) that would be obtained bysolidifying a 20% alloy of B.1000°Ca+LL+C900°С12αa+C451200 CL+y140096C+Ya+ß800°C700°CC+B9692a+B010203040506070 80 90 100A% peso BB

Answer:Explanation:The phase diagram helps determine phase composition using the **lever rule**. For…

Answered: The diagram shows two metals, A and B,…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Heating MgSO4•7H2O at 150oC produces a different hydrate, MgSO4•XH2O. If heating 24.4 g of pure MgSO4•7H2O at 150oC were to give 19.0505 of pure MgSO4•XH2O, what is the integer value for X?
Zinc may be directly leached from zinc-lead sulphide concentrates by reaction with sulphuricPbS(s) + H2SO4 + 1 O2(g) → PbSO4(solid) + SÂ° + H2O 21ZnS(s) + H2SO4 + 2 O2(g) → ZnSO4(aq) + SÂ° + H2Oacid and oxygen. In addition, lead sulphide will be oxidized to give insoluble lead sulphate:Assume that a plant is to treat 400 t/day of concentrate containing 20.0 weight % Zn as ZnS and 110.0 weight % Pb and PbS. The concentrate and leach solution enters the leaching vessel at 32.0% solids. During the leach, 85.0% of the zinc is extracted and all the lead sulphide is oxidized. After the leaching step, the slurry passes to a thickener.(a) Calculate the concentration of Zn (in g/L) in the solution passing to metal recovery. Assume a solution density of 1.11 g/mL.(b) Calculate the tonnes per day of elemental sulphur produced.NOTE: â€œ% solidsâ€ is the solids content of a slurry (consisting of particles and solution) and is defined as…
Consider we have a silicate glass composition, this composition as shown below in percent by weight 15Na₂O +5K₂O +2.5MgO +9.5 CaO +6 BaO + 5Al₂O3 +57 SiO₂- First, convert this composition to mole percent. Then classify each oxide added to the glass according to Sun's bond criteria. According to this classification, is this composition make glass or not? Min MO K Mg Ca Al Si Valance 1 1 2 2 2 3 4 Dissociation energy per MOX (in Kcal.) 120 115 222 257 260 402 424 Coordination Number 6 9 6 8 8 4 4 Molecular weight of oxides is shown below Oksitler (Molekül Agri): Na,O (61.97), KO (94.18), MgO (40.31), CaO (56.08), Bao (153.33), ALO, (10156), 50, (60.08) Single Bond Strength (Kcal/mole) 20 13 37 32 33 101 106
The Ostwald process for the commercial production of nitric acid fromammonia and oxygen involvesthe following steps:4NH3 (g) + 5O2 → 4NO (g) + 6H2O (g)2NO (g) + O2 (g) → 2NO2(g)3NO2 (g) + H2O(l) → 2HNO3 (aq) + NO (g)a.Use the values of ΔH° ( in Appendix 4 to calculate the value of ΔH° for each of the preceding reactions.b. Write the overall equation for the production of nitric acid by theOstwald process by combining the preceding equations. (Water is also a product.) Is the overall reaction exotihermic or endothermic?
Consider we have a silicate glass composition, this composition as shown below in percent by weight 15Na₂O +5K₂O + 2.5MgO +9.5 CaO +6 BaO + 5Al₂O3 +57 SiO₂. First, convert this composition to mole percent. Then classify each oxide added to the glass according to Sun's bond criteria. According to this classification, is this composition make glass or not? Min MO K Mg Ca Al Si Valance 1 1 2 2 2 3 4 Dissociation energy per MOX (in Kcal.) 120 115 222 257 260 402 424 Coordination Number 6 9 6 8 8 4 4 Molecular weight of oxides is shown below Oksitier (Molekil Agri): NajO (61.97), K,0 (94.18), MgO (40.31), CaO (56.08), Bao (153.33), ALO, (1015), 50, (60.08) Single Bond Strength (Kcal/mole) 20 13 37 32 33 101 106
[References] Cryolite (Na3AIF6) is used in the commercial production of aluminum from ore. Cryolite itself is produced by the following reaction: 6 N2OH + Al203 + 12 HF → 2 Na3AlF6 + 9 H2O A mixture containing 440.0 kg of NaOH, 236.9 kg of Al203, and 600.0 kg of HF is heated to 950 °C until it reacts to completion. What is the maximum mass of Na3AIF6 formed? kg Na3AIF6
What is the balanced equation for water is driven from copper sulfate pentahydtate,CuS04*5H2O,with heat?
State the difference between concrete and Portland cement.(a) There are no differences, in concrete the chemical composition is silicates and in cement aluminates.(b) The chemical composition of concrete is based on silicates and in cement aluminates.(c) Concrete is composed of aggregates bound by cement and cement "only" contains different minerals.(d) Cement is aggregates bound by concrete.
An impure sample of Na3PO3 weighing 0.1392 g was dissolved in 25 mL of water. A solution containing 50 mL of 3% w/v mercury(II) chloride, 20 mL of 10% w/v sodium acetate, and 5 mL of glacial acetic acid was then prepared. The solution containing the phosphite was added dropwise to the second solution, oxidizing PO3^3– to PO4^3– and precipitating Hg2Cl2. After digesting, filtering, and rinsing, the precipitated Hg2Cl2 was found to weigh 0.4320 g. Report the purity of the original sample as %w/w Na3PO3. Moles Na3PO3 = moles Hg2Cl2
Using ice calorimetry, the heat of reaction was monitored when 2.00 mL of 5.241 M standardized HNO3(ag) reacted with excess NaOH(ag). This reaction caused 0.570 g of ice to melt. What was the heat of reaction per mole of HNO3 (in kJ mol-1)? (AHfus(ice) = 333 Jg-1) %3D +31.0 O -18.1 +5.21 +18.1 -31.0
Topic: Equilibrium Phase Diagram QUESTION 1 A 50 wt% Pb-50 wt% Mg alloy is slowly cooled from 700C to 400C. (a) At what temperature does the first solid phase form? (b) What is the composition of this solid phase? (c) At what temperature does the liquid solidify? (d) What is the composition of this last remaining liquid phase? Composition (at% Pb) 10 30 40 70 100 700 1200 600 a +L Ma Pb M 1000 500 800 400 Mg Pb 600 300 400 200 a + MgPb 100 MgPb 200 MgPb 20 40 60 100 (Mg) Composition (wt% Pb) (Pb) 1 (5) aungeedue
A crystal of the mineral pharmacosiderite, Fe,(ASO4)2(OH)3 5H₂O, contains % oxygen by weight. • m a) 43.6 b) 38.2 c) 30.0 d) 27.3 e) 13.6

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