January 2019 1 252 Report
Raportul dintre masa de CO2 si masa de H2O rezultate din arderea unui izoalcan A este 1,9555. Sa se identifice izoalcanul.
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Una dintre metodele de obtinere a poliacrilonitrilului foloseste ca materii prime metanul, amoniacul si oxigenul. Calculati volumul (c.n.) de metan de puritate 98% necesar obtinerii a 212 kg de poliacrilonitril, daca randamentul intregului proces este de 75%
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urgent, va rog: use phrasal verbs from above to decide what you would say to someone who: 1. you are relying 2. looks depressed 3. won't tell you what is wrong 4. seems to be overworking
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Vreau si eu propozitii simple cu: afraid of, amused by, angry about, annoyed about, anoxious about, ashamed of, bored of, brilliant at, close to, delighted with, disappointed with, excited about, faithful to, friendly with/to, frightened of, furious with, grateful to, jealous of, nervous about, pleased with, proud of, rude to, sensitive to, upset about. Stiu ca sunt multe, dar va rog, urgent, ce idei aveti, scrieti-le!!
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O scrisoare sub forma unei invitatii la un festival adresata unui prieten in engleza, va rog
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Numarului lui Avogadro= 6,023* 10 la puterea 26 molecule/kmol. calculati a) nr moleculelor dintr-un kg de CO2 b) masa unei molecule de CO2 c) numarul de molecule dintr-un m3 (metru cub) de CO2 aflat in conditii normale (V=22,42 m3/kmol)
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