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- In a given alloy of Nb-Vd: * in the given 24 wt % Nb - 76 wt % Vd alloy with the density of the pure Nb of 8.57 g/cm' and density of the pure Vd of 6.10 g/cm', what is the number of Nb atoms per cubic centimeter (cm') if the atomic mass of Nb is 92.90638 g/mol? a. 1.5728 x 10° Nb atoms b. 1.01945 x 1022 Nb atoms c. 2.81822 x 1014 Nb atoms d. 1.24626 x 1020 Nb atoms4m K R EMetals H X Se.com/u/1/c/MTUAMTYZNTK2OTM3/a/Mig0NjcAMzk0ODA4/delails tals Homework Packet 18.pdf Oper wth UNDERSTANDING ORES Most ores look like ordinary rocks. You would not guess that they contain shiny metal. The earth's crust is made up of many minerals. Minerals can be defined as naturally occuring chemical elements and compounds. People have discovered more than 2,000 different minerals. Many of these contain metals. But because the metal elements are linked with other elements in the minerals, the metals do not show all of their properties. Figure A 1. Most minerals are elements, compounds 2. In order to free the metal from the other elements, a mineral must be synthesized, decomposed Page 3 I 6 Q +The maximum solid solubility of carbon in ferrite occurs at 0.022 wt% C and 727 ° C, the eutectoid composition is 0.76 wt% C, the maximum solid solubility of carbon in austenite occurs at 2.14 wt% C and 1147 ° C, and the cementite composition is 6.7 wt% C. For 2122 g of a 3.2134 wt% C steel at 726 ° C, what will be the mass of carbon present as part of a compound?(a) 67.9 g(b) 74.2 g(c) 58.7 g(d) 83.5 g
- Scence Midterm Summ X Material%20Science_Midterm%2 x ewer?url=https://ttu-storage.s3.eu-central-1.amazonaws.com/account 1/attachments/390676/Ma ence Midte 02021.pdf Open with Google Docs 5. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute its theoretical density: 6. Below is a unit cell for a hypothetical metal. (a) To which crystal system does this unit cell belong? 40nm 030 nm 0.30 nm (b) What would this crystal structure be called? 1 1 2 7. Sketch a tetragonal unit cell. and witnin that Page Hocations of the point: DELL45) Acety lene gas,CzHz is used in extremery hot flame when ty gererates combusted with oxygen- The heat geneateel is suffucient to melt the metals beng an becuse it is welded tagether. Carban diuxide and weeter vapar are Hhe chemical proclucts of this reachion, write the unbalancel chemical equutian for the renchion of acetylene witn gus oxvgen. 55) When elemental boron, B, is burned in cxygen gus, the product is dibaron trioxide. If the diburon trioxide is then cacted with a measureed quantity of waters it ceacts with the water to form what' is commonly known as boric acid, BlOH),, wrte a balanced éhemical cquation for 'of Hese each processes. 57.) A.common demonstration n chemistry cuurses invohies of odd ng a tiny apeck hya ragen peroxide Is unstable, Manganese. () 'oxide to a corceptrg decomposes and it' quite" spectacularly under twse cond itions to produce steam (waler vapor). Manganese () + oxicle ib a cfa lyst for the decomposition of higdraen proxide ond is not consumeed in…Calculate the amaunt of enerqy requirad te melt of aluminum pop cons initially at 25°C. 5.0 kg Al has AH fus =1G.BKJNmd)
- 1. Which of the following compounds can form hydrogen bonds with water?a. octaneb. HClc. NaCld. acetic acid2. Maria wants to determine the percent water content of an unknown hydrate of AB. Given the following data:mass of empty crucible - 12. 2784gmass of AB · xH20 + crucible - 17.4960gmass of AB + crucible - 15.1314gCalculate the % water content of the hydrate3. From the above data, give the correct formula for the hydrate. (AB₂ Molar mass = 129.84 g/mol)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 1067. An impure sample of Na S04 weighed 1.562 g. A BASO, precipitate from this sample weighed 2.496 g. Calculate the percentage of sulfur and the percentage purity of the salt. Ans. 21.97% S; 97.25% Na S0. ore sample which weirbed
- For the alloy Mg-45 wt% Pb alloy at 500 C, what is the weight percentage of Pb in liquid?tebe laer. harasof lrglamriradip VICE ling trm Calleg Capialgh L ELECTRONIC FIGETING On ENAPPROPRIATE PHTSICAL CONTACT Prac. Prob's FI18-22 4) feCly 5) Biz Molar Mass Ann K 2) 39.10+ 16.0 t1.01 56.11 g/mol )P-30.9 2) CI: 51.99 ) Ca- 40 07 4) Ar: 149 5) Na= 20.9 6) Al= 269 H= 101 2) Kott 3) BeCla ) CI = 2(35 45)= 0.91 g/mol note book CH 17) Dr na %3D Exit ticket: 1-18-aa frm 1-1 aned selve slom problem ) Calculate the number oF COa mal in 3.00 molecules (I mole =(6 02 Y 10) Còa= 44.619) 2) UF; 3) Soa 9) Hypy 5) (nH), SOy ) CHy CootH 3.00 X |- 10-2 ) nuc- 1) mala erent Syst Planct +Andna Boc 55cable below you will find three descriptions of sclentists engaging In activitles that are part of the sclentifi description missing word? Carl records In his lab notebook the powder In a test tube, the powder melts into a silvery liquld that welghs less than the original powder. that when he heats a red Antolne develops a idea that most substances will chemnically combine with an invisible gas in the atmosphere he calls oxygen. Antoine uses hls ideas to explain burning as the comblnation of a substance with oxygen, and reduction (e.g. durlng che formation of iron from iron ore) as the splitting of a substance from a chemical combination with oxygen. for chemical reactions based around the ohn analyzes all the known compounds of carbon and oxygen. He finds nd writes down a that says the ratio of masses of carbon that combine with 100 g of oxygen in these compounds are always in whole umber ratios (e.g. 2:1 or 3:1).