Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
- \\(\\text{pn}_3\\) is a chemical compound. a. is this an ionic or coval…
- chlorine dioxide is a chemical compound. a. is this an ionic or covalen…
- tearing a magazine page is an example of a combustion. b compression. c…
- hydrogen bonds oxygen atoms are strongly _______________. so when they …
- which of the following beakers contains the solution with the highest c…
- red cabbage juice can be used as a ph indicator. the indicator will cha…
- objective in this lesson, you will ______. chemical structure of water …
- which of the following rows identifies an element that will form an ion…
- use the following information to answer question 10. density of fresh w…
- birch syrup contains glucose. the chemical formula for glucose is shown…
- when 2.00 g of solid lithium completely reacted with oxygen gas, 4.31 g…
- some information about a bleach solution * caustic * causes severe burn…
- methane is a compound that is a component of natural gas. natural gas i…
- methane is a compound that is a component of natural gas. natural gas i…
- periodic table of the first eighteen elements which of the following ca…
- to explain their results, the student writes down the following propert…
- use the following information to answer question 4. a cyclist is adding…
- 1. draw a diagram of a transverse wave and label the following: (a) cre…
- use the following information to answer questions 2 and 3. 4.00 g of su…
- 10. what is the molar mass of \\(\\text{nahco}_3\\)? 11. how can you te…
- 6. complete the following table: \\begin{tabular}{|l|l|} \\hline \\text…
- which of the following was not a part of james madisons legacy? he took…
- 7 multiple choice 10 points according to the theory of plate tectonics,…
- 7 multiple choice 10 points according to the theory of plate tectonics,…
- 4. le calcium est un élément chimique important dans la calcification d…
- 2. identifie latome qui aura une charge partielle négative dans les lia…
- 50. carbon-12 and carbon-14 are ______ a. ions because they have a diff…
- 48. which of the following materials is a mixture? a) air b) magnesium …
- 47. which element when combined with chlorine would most likely form an…
- 46. an ionic compound is a) electrically neutral. b) composed of anions…
- 45. what is the correct name for the compound nacl? a) sodium chloride …
- hydrogen is placed separately from other elements in the periodic table…
- 43. a horizontal row of elements in the periodic table is called a(n) a…
- 42. the atomic number of oxygen, 8, indicates that there are eight a. p…
- 41. isotopes are atoms of the same element that have different a. princ…
- 40. an atom is electrically neutral because a. neutrons balance the pro…
- 39. according to the law of conservation of mass, when sodium, hydrogen…
- the reaction represented by the equation \\(\\text{mg(s)} + 2\\text{hcl…
- 37. in what kind of reaction do two or more substances combine to form …
- 36. when the equation \\(\\text{fe}_3\\text{o}_4 + \\text{al} \ ightarr…
- 35. when the following equation is balanced, what is the coefficient fo…
- 34. how many protons, electrons, and neutrons does a neutral atom with …
- 33. using the periodic table, determine the number of neutrons in \\(^{…
- 32. name of this substance; cao? a) calcium oxide b) calcium hydride c)…
- 31. which of the following is not a phase change? a) melting b) burning…
- 30. a substance that is formed by a chemical reaction is called a a) mo…
- 29. the equation \\(2\\text{kclo}_3 \ ightarrow 2\\text{kcl} + 3\\text{…
- 27. what kind of reaction is represented by the equation? (2\text{ki} +…
- 26. in a combustion reaction, one of the products is always _______ a) …
- 25. which of the following is not evidence of a chemical reaction? a) b…
- 24. what is the formula for lithium sulfide? a) lis b) \\(\\text{li}_2\…
- 23. what is the formula of the compound aluminum phosphide? a) alp b) a…
- 22. which of the following is the correct name for \\(\\text{n}_2\\text…
- 21. of the following elements k, cu, li, and s, which is a nonmetal? a)…
- 20. the elements in group 1a (group 1) of the periodic table are called…
- 19. the elements in group 7a (group 17) of the periodic table are calle…
- 18. which of the following elements is a transition metal? a) magnesium…
- 17. what is the charge of an anion? a) a positive charge b) no charge c…
- 16. how many valence electrons are in an atom of silicon? a) 2 b) 3 c) …
- 15. what is the element with the largest atomic radius? a) cesium b) ch…
- 14. as you move across a period of the periodic table from left to righ…
- 13. a covalent bond is a bond between _______ a) a cation and an anion …
- 12. which of the following occurs in an ionic bond? a) oppositely charg…
- 11. which of the following is an example of a homogeneous mixture? a) o…
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d) \\(\\text{koh} + \\text{so}_3 \ ightarrow \\text{k}_2\\text{so}_4 + …
### Balanced Equation: \[ 2\text{KOH} + \text{SO}_3 ightarrow \text{K}_2\text{SO}_4 + \text{H}_2\text{O} \] ### Atom Inventory Table: | Element | Reactants (Left Side) | Products …
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examen de chimie (1h30) l1-biomed-série2 - calculatrice autorisée - doc…
### Exercice 1 : 1. **Substituants du carbone asymétrique classés par ordre CIP décroissant :** \[ -\text{OH} \ (1) > -\text{CH}_2\text{CH}_3 \ (2) > -\text{CH}_3 \ (3) > -\text{H…
- in an experiment, 12.0 g of solid carbon, \\(\\text{c}(s)\\), reacted w…
- change in temperature in a solution during a chemical reaction over tim…
- classify each example of matter by moving the example into the box with…
- a teacher challenged a group of students to identify an unknown white s…
- the reaction below is at 323 k. \\(\\text{n}_2(\\text{g}) + 3\\text{h}_…
- calculate the equilibrium concentrations of the components based on a 0…
- the formation of ammonia is a reactant-favored process, as shown below.…
- the ice\ table below shows the c and e in terms of x. calculate the \\(…
- because \\(q = 0.016\\) is less than \\(k = 25.0\\), the reaction proce…
- \\text{h}_2 = 0.40\\text{ m}, \\text{br}_2 = 0.40\\text{ m}, \\text{ an…
- a mixture of 4.1 atm \\(\\text{co}_2\\), 2.1 atm \\(\\text{h}_2\\), and…
- a mixture of 4.1 atm \\(\\text{co}_2\\), 2.1 atm \\(\\text{h}_2\\), and…
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exercice \\(agno_3(aq) + nacl(aq) \ ightarrow agcl(s) + nano_3(aq)\\) o…
1. **Réactif limitant :** \( \text{AgNO}_3 \) 2. **Masse de \( \text{AgCl} \) produite :** \( 14.33\text{ g} \) 3. **Concentration finale de \( \text{NaNO}_3 \) :** \( 0.18\text{ …
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bien sûr ! essaie celle-ci tout seul : exercice \\bacl_2(aq) + na_2so_4…
1. **Le réactif limitant :** \(\text{BaCl}_2\) 2. **La masse de \(\text{BaSO}_4\) produite :** \(28.01\text{ g}\) (or \(28\text{ g}\) using two significant figures) 3. **La concen…
- 2. solution: sugar syrup * solute: * solvent: 3. solution: coffee * sol…
- review - year 10 chemistry activity 1 - key terms complete the vocab bo…
- question 42 when atoms of most materials combine to form molecules, the…
- when a magnetic materials molecules are all lined up, and increases in …
- if a magnetized object is struck, the vibration often causes the molecu…
- an atom of iron contains how may electrons? a. 22 b. 8 c. 4 d. 26
- 2. identifie les éléments clés présentés par chaque chimiste à propos d…
- marcy uses ph strips to measure the ph of water samples from several po…
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situation a: laura writes this word equation: hydrochloric acid + sodiu…
### Situation A: 1. **What does the \( \uparrow \) symbol mean in this equation?** * **Ans:** It indicates that a gas is produced and released during the reaction. 2. **What kind …
- colton has dissociative identity disorder. fat freddy and carmen are tw…
- 05 question (10 points) the nonspontaneous reaction \\d + e \ ightarrow…
- 1. draw the structures for a and b 2. write the reagents for each react…
- which of the following processes is spontaneous? choose one or more: - …
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or a chemical change. the previous demonstrations, fill in the table be…
Here is the completed table based on the analysis: | Activity | Expected Observation | Type of Change (Physical/Chemical) | Indicator (If Chemical) | | :--- | :--- | :--- | :--- |…
- question 16 an example of a renewable resource is (choose all that appl…
- which condition is a cluster of obesity-related risk factors associated…
- question 10 fossil fuels consist of extracting decomposed organisms or …
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exercice 4 : (3 points) 1. comment appelle-t-on le nombre quantique ass…
### Exercice 4 1. **Nombre quantique secondaire** \( l \). * **s** : \( l = 0 \) (max 2 \(e^-\)) * **p** : \( l = 1 \) (max 6 \(e^-\)) * **d** : \( l = 2 \) (max 10 \(e^-\)) * **f…
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exercice 6 : (5 points) lacide malonique de formule brute \\(\\text{hoo…
L'équation équilibrée par la méthode algébrique est : \[ \text{C}_3\text{H}_8(g) + 5\,\text{O}_2(g) \longrightarrow 3\,\text{CO}_2(g) + 4\,\text{H}_2\text{O}(l) \]
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4. en déduire lâge approximatif de léchantillon. on rappelle que la pér…
1. **Principe s'opposant à un équilibre chimique :** Le principe de Le Chatelier (ou principe de modération). 2. **Équation de la réaction de titrage :** \[ \text{H}_3\text{O}^+_{…