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- Perte de masse 3 (Radio-52)Il sera complètement divisé en un gramme 23592U. Par grammes il y aura env. 8.21·1010 J énergie libéré, voir à cet effet aussi une précédents exercice. Les suisse le besoin dans les les derniers 5 années en moyenne ronde 810'000 térajoule énergie par année. Supposons que vous souhaitiez obtenir cette énergie uniquement en divisant 23592U. Quelle est la taille d'une boule d'orange correspondante ?
D'autres données sont nécessaires pour le calcul:- 1 térajoule = 1012 [traduction manquante], pâques totales: 8.1·1017 J
- D'autres sources parlent de 2.04·1017 J
- Densité l'uranium 19.1 g/cm3
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in: Radioaktivität_fr
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- Herstellung einer bestimmten Konzentration (SB-40)Beschreibe die Herstellung folgender Lösungen im Labor. Das Lösungsmittel sei immer destilliertes Wasser.
Annahme Die Substanzen seien als Salze vorliegend und lösen sich komplett in Wasser.- a) 1 Liter einer 0.3 M NaOH-Lösung
- b) 1 Liter einer 0.4 M HCL-Lösung
- c) 25 ml 0.5 M NaOH-Lösung
- d) 30 ml 0.6 M H2SO4
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- Calcolare il diametro del nucleo (Radio-10)Calcolare il diametro dei seguenti nuclei:
- 3H
- 40K
- 235U
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- 1 week, 4 days ago
- Chemical influence GW, pressure, 2 (GW-26)The following reactions including references to the state of matter are given. How does the balance change when… increasing the pressure (p ↑), decreasing the pressure (p ↓)
- N2O4(g) ⇄ 2 NO2 (g)
- N2(g) + 3·H2 (g) ⇄ 2·NH3 (g)
- N2(g) + O2(g) ⇄ 2·NO(g)
- 2·SO2(g) + O2(g) ⇄ 2·SO3(g)
- PCl5(g) ⇄ PCl3(g) + Cl2(g)
- NH4Cl(s) ⇄ NH3(g) + HCl(g)
- CaCO3(s) ⇄ CaO(s) + CO2(g)
- CH4(g) + H2O(g) ⇄ CO(g) + 3·H2(g)
- H2(g) + I2(g) ⇄ 2·HI(g)
- CO(g) + 2·H2(g) ⇄ CH3OH(g)
- C2H4(g) + H2(g) ⇄ C2H6(g)
- 2·CO(g) ⇄ CO2(g) + C(s)
- C6H6(l) + 3·H2(g) ⇄ C6H12(l)
- Na2CO3(s) + CO2(g) + H2O(l) ⇄ 2·NaHCO3(s)
- NH4HCO3(s) ⇄ NH3(g) + CO2(g) + H2O(l)
- CuSO45H2O(s) ⇄ CuSO4(s) + 5H2O(g)
- AgCl(s) ⇄ Ag+(aq) + Cl–(aq)
- H2O(l) ⇄ H2O(g)
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- Definition pH (SB-41)Was ist der pH?
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- Creare una trama (Radio-11)Tracciare il grafico della funzione r = 1.2·10-15·A(1/3) (risultato in metri)
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- L’élevage du sel (Salze-02)Comment les sels sont-ils constitués?
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- Effect of chemical GW, concentration (GW-30)Around the influence of the chemical GW by the change in concentration.
- How can the equilibrium constant K be affected by a change in the concentration of the products? Assuming p and T remain constant.
- Suppose the concentration of reactant is increased (in balance) reactant.
- Suppose a reaction removes some (or all) of the product.
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- Logarithmus (SB-42)Wieso wird der Logarithmus verwendet?
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- Nucleo di elio denso (Radio-12)Calcolare la densità di un nucleo di elio (4He)
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- Définir le cation (Salze-03)Qu'est ce qu'un cation ?
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- Chemical influence GW, concentration, 2 (GW-31)The following reaction was given:
Fe3+ ([translation unavailable]) + 3·SCN– ([translation unavailable]) ⇄ Fe(SCN)3
The product is deep red, the texture yellow
How does the balance and colour of the solution change?- Addition of FeCl3
- Addition of KSCN
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- pH-Wert 1 (SB-43)Berechne den pH einer 3 molaren Salzsäurelösung.
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- Definire (in generale) le diverse possibilità di decomposizione (Radio-20)
Definire in generale le seguenti decomposizioni.
A → B + C, in cui: a a tutti particolato le numero atomico e le numero di massa indicato sono dovrebbe.- decadimento alfa
- decadimento beta meno
- decadimento beta più
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- Définir Anion (Salze-04)Qu'est ce qu'un anion ?
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- Influence of chemicals GW, Chatelier principle (GW-40)What is the principle of Chatelier ?
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- Berechne diverse Werte (pH etc) (SB-44)Berechne / Ergänze die Werte in folgender Tabelle.
c(H3O+ mol/l) c(OH– mol/l) pH pOH 0.001 0.01 0.1 0.2 12 11 Started by:
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- Various decomposizioni 1 (Radio-21)Completare la tabella seguente scrivendo nel contenuto delle cellule l'elemento corrispondente dopo la decomposizione.
Attenzione: è molto possibile che gli iscritti Non si verificano decomposizioni nella realtà, si tratta solo dell'applicazione delle decomposizioni teoriche.
disintegrazione: decadimento alfa decadimento beta meno decadimento beta più 13C 94Be 137N 135B 17O 240U 232Th 200Au 214Pb Started by:
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- Définir Zwitterion (Salze-05)Qu'est-ce qu'un zwitterion ?
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- Influence of chemical GW, influence of reaction conditions (GW-41)How do the following reaction conditions work? Supplement / corrects the following statements:
- An increase in temperature favors an endothermic-exothermic reaction.
- A reduction in temperature favours an endothermic – exothermic reaction.
- An increase in pressure favours gas reactions that decrease in volume – increase in volume
- Pressure reduction favours gas reactions that are reduced in volume – increase in volume
- An increase in the yield of a reaction can be achieved by using an educate – excess products or by removing an educate – product from balance.
- A catalyst affects the position of a chemical balance
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- Les ions les plus stables (Salze-10)Les atomes indiqués sont les suivants: aluminium, fluor, 4Be, potassium, 52Te, néon, calcium, soufre et nitrogen.
Déterminez les nombre le électrons de valence de à chaque personne atome et directeur afin que le le plus fréquent ion à partir de.Started by:
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- Chemical influence GW, cobalt complex (GW-42)Enter the following reaction:
[Co(H2O)6]2+ + 6·Cl– ⇄ [CoCl6]4- + 6·H2O
The water complex is pink, the chloride complex is blue.
The reaction is endothermic from left to right.
What is the reaction to the following: What are the following reaction conditions ?- Addition of hydrochloric acid, HCl
- Addition of silver nitrate
- Heating of the mixture
- Admitting water
- Admitting cooking salt
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- Sauer, Neutral und Basisch, Bereich angeben (SB-45)Ergänze die fehlenden Lücken in der Tabelle mit den Werten < 7, = 7, > 7, < 10-7, = 10-7 sowie > 10-7
Bezeichnung saure Lösung neutrale Lösung basische Lösung c(H3O+ mol/l) pH c(OH– mol/l) pOH Started by:
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- Quale elemento (Radio-22)Il elemento x (numero di massa 214) decaduto dopo un decadimento alfa in tre identici cereali y (numero atomico 26). Completare y con le numero atomico e numero di massa e scrivere la reazione completa di decomposizione.
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- Influence of chemicals GW, mineral water (GW-43)Mineral water can be produced in the following quantities:
H2O (l) + CO2 (g) ⇄ H2CO3 (l)
Explain with Chatelier why an open bottle of mineral water becomes boring over time, and at the end of the day only There's water.Started by:
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- Konzentrationen Hydroxonium etc (SB-46)Gegeben sei eine Lösung A mit pH = 7 sowie eine Lösung B mit pH = 8. Beurteile (richtig – falsch) folgende Aussagen:
- a) Die H3O+-Konzentration von A ist zehnmal so gross wie die der Lösung B
- b) Die H3O+-Konzentration von A ist gleich der OH– Konzentration von A
- c) Die H3O+-Konzentration von B ist zehnmal kleiner als die c(OH–) der Lösung B
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- Cosa fare (Radio-23)Es sono dato ciascuno un (puri) [traduzione mancante], fabbricazioni di plastica e radiodiffusioni gamma. Su uno si deve sedersi, sull'altro si deve mangiare e sul terzo si può allontanarsi il più possibile. Cosa fare?
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- Formule du sel constituer (Salze-20)Écrire tous (à caractère binaire) formules des sels sur, quelles se de les le plus fréquent ions suivants éléments constituer laissez:
Bromée, oxygène, potassium, aluminium, calcium et nitrogenStarted by:
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- Chemical influence GW, endothermic or exothermic (GW-44)At 25 ℃ an equilibrium has been established. If the reaction is now cooled to 0 ℃ the concentration of the product increases. Question: Is the reaction (→) endothermic or exothermic ?
For example, A + B ⇄ CStarted by:
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- pH-Berechnungen, 1 (SB-47)Berechne die pH-Werte folgender Lösungen, das Lösungsmittel sei immer reines Wasser:
- 1 g Salzsäure (HCl) gelöst in einem Liter Wasser
- 1 kg Salzsäure (HCl) gelöst in einem Kubikmeter Wasser
- 1 g NaOH, gelöst in einem 2 Liter Wasser
- 81 mg HBr in 0.1 Liter Wasser
- 1 Gramm Schwefelsäure in 1 m3 Wasser. Annahme: komplette Deprotonierung der Schwefelsäure.
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- Emivita 1 (Radio-30)Le emivita ('HWZ') di un isotopi quantità 10 anni. Dopo quanti anni (espressi in “moltiplici dell'HWZ”) il numero di atomi originariamente esistenti ha ottenuto la quantità seguente:
- la metà
- un quarto
- una 128.
- Circa l'1%
- Circa 1 promille
- Circa un milionesimo
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- Sont formés des sels à ions, 1 (Salze-21)Quelles sels ('formules des sels') laissez se de les suivantes ions constituer:
Al3+ / NH+4 / Fe2+ / Fe3+ / Na+ / Mn2+ / O2- / S2- / NO3– / Br– / SO2-4 / H2PO4– / CO2-3 / PO3-4Started by:
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- Chemical influence GW, expansion (GW-45)Which side will the GW be shifted to when the reactor vessel is expanded? The reaction was:
PF5 (g) ⇄ PF3 (g) + F2 (g)Started by:
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- pH-Berechnungen, 2 (SB-48)Berechne die Masse an H3O+ sowie OH– in …
- a) … einem Liter Wasser. pH = 6
- b) … im Bodensee. Der pH sei 7
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- Emivita, massa (Radio-31)Supposizione falsa: 10 miliardi di anni fa, ci sarebbero stati 10 miliardi di kg244Pu, il cui HWZ era di 8.3·107 anni.
Quanti atomi nucleari sono oggi di i originari 244Pu ancora presente?Started by:
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- Des images sels de ions, 2 (Salze-22)Quelles sels ('formules des sels') laissez se de les suivantes ions constituer:
Al3+ / NH+4 / Fe2+ / Fe3+ / Na+ / Mn2+ / O2- / S2- / NO3– / Br– / SO2-4 / H2PO4– / CO2-3 / PO3-4
Remarque: les ions doivent être répertoriés en fonction de leur charge, donc d'abord les simples positifs, puis les doubles positifs, etc. Et: comme d'habitude: avec un tableau, la chose devient plus claire.Started by:
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- Chemical influence GW, all reaction (GW-46)Given be the reaction: 1·A(g) + 1·B(g) ⇄ 1·C(g). The synthesis of the products be [translation unavailable].
How can a variation in pressure p and temperature T produce as much product as possible?
What are the practical consequences of the reaction conditions ?Started by:
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- pH-Berechnungen, Verdünnungen (SB-49)Berechne die pH-Werte folgender Lösungen, das Lösungsmittel sei immer reines Wasser:
- Eine 0.03 molare HCl-Lösung wird hundertfach verdünnt.
Berechne den pH vor und nach der Verdünnung - 20 ml 0.05 M HCl wird mit 100 ml destilliertem Wasser verdünnt.
Berechne den pH vor und nach der Verdünnung - Zu 50 ml einer 0.2 molaren NaOH-Lösung wird 100 ml destilliertes Wasser gegeben.
Berechne den pH vor und nach der Verdünnung
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- Eine 0.03 molare HCl-Lösung wird hundertfach verdünnt.
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- Decisione dell’età 1 (Radio-40)Come antico è una semplice, le una 8-una volta più profondo 14C-Konzentration contiene come un ancora più vivente organismo (HWZ(14C)= 5730 anni)
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- Ions, formule du sel de nom du sel déduire (Salze-23)Donnez les noms des sels suivants, complétez le tableau.
Nom du sel cation Formule de Lewis de l'anion formule du sel Sodium sulfate Le nitrate de potassium Le phosphate de calcium Le carbone de magnésium Chlorure d'ammonium Blei(II)-le sulfure L'oxyde de Eisen(II) L'oxyde de Eisen(III) Carbure d'aluminium Les matières premières dérivées L'acétate de sodium Oxyde d'aluminium Started by:
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- Fixed number of protons, neutrons and electrons (Radio-01)Determine the number of protons, neutrons and electrons in the following atomic nuclei
number… Protons Neutrons Electrons 31H 52He 13C 234U 13C2+ 34S2- 4He2+ 17O 200Au+ 78Br– Started by:
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- Neutralisationen (SB-60)Formuliere die Neutralisationsreaktionen in Ionenschreibweise und bilde die entsprechenden Salze, analog zur Aufgabe a).{a) Natriumhydroxid + Salzsäure }Na^+ + OH^- + H3O^+ + Cl^- -> NaCl{(aq)} + 2H2O{b) Natriumhydroxid + Salpetersäure }{c) Natriumhydroxid + Kohlensäure }{d) Kaliumhydroxid + Schwefelsäure }{e) Kaliumhydroxid + Phosphorsäure }
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- Decisione dell’età 2 (Radio-41)Come molti atomi 14C contiene 1 g di carbonio, che è di 5730 anni. Nota: un campione attuale ('di oggi') ha un rapporto di 14C/12C di 1.2·10-12.
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- Formation de différents sels (Salze-24)Formez les éléments neutres suivants sels et écrivez les éléments équilibrés équation de réaction:
- NaCl
- MgO
- KBr
- Al2O3
- Le fer (II) oxyde
- Le fer (III) oxyde
- Oxyde de sodium
- Oxyde de calcium
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- Percentage ratio 1 (Radio-02)More natural carbon exists to 98.94% from 12C, the remains of which: from 13C (m=13.003355 u).
- Calculate the expected average carbon mass from these values.
- What can be deduced from the actual value of 12.0107 (value from PSE))?
- Calculate the to expected average carbon mass with the the idea, that the masses of m(12C)=12u and m(13C)=13u amount.
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- pH-Berechnungen, Mischungen (SB-61)Berechne den pH-Wert folgender Mischungen.
- Zu 80 ml einer 0.05 M Salzsäurelösung werden 100 ml einer 0.01 M Natronlaugenlösung gegeben.
- Zu 60 ml einer 0.015 KOH-Lösung werden 30 ml 0.2 M Salzsäurelösung gegeben.
- 10 ml 0.2 M Salzsäurelösung werden zuerst zehnfach verdünnt und dann mit
1.0 g Ca(OH)2 versetzt.
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- Decisione dell’età 3 (Radio-42)Che tipo di intervallo di tempo è accessibile con l'14C-Methode. La seguente ipotesi: il limite di misura è circa 1000 volte inferiore alla concentrazione a 14C, che può essere dimostrata in organismi viventi.
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- Decisione dell’età 4 (Radio-43)Nell'organismo vivente si misurano circa 16 decomposizioni al secondo per ogni grammo di carbonio. In un antichi fabbrica di legno, che 5 g carbonio contiene, misura si 44 decadimenti per seconda. Quanto è vecchio il pezzo di legno?
Accettazione: lineare disintegrazione tra: due emivite, T1_2(C) quantità 5730 anni.Started by:
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- Des ions constitués de sels (Salze-25)Soient donnés suivantes sels. Quels sont les ions présents ? Leur nombre n'a pas à être déterminé. Le premier exemple est déjà résolu.
- NaCl: Na+ / Cl–
- Al2O3
- MgO
- KBr
- FeO
- Fe2O3
- Na2O
- CaO
- (NH4)2HPO4
- Ca(H2PO4)2
- Fe(NO3)3
- Ba(ClO3)2
- Ca(OH)2
- Ca3(PO4)2
- Zn(HCO3)2
- LiCO3
- Na2H2P2O7
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