Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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question 3 of 10 what does the object below model? a. electronic circui…
C. Atoms in a molecule
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question 2 of 10 what kind of model is shown below? a. computer model b…
C. Physical model
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question 1 of 10 which of the following phrases best describes a physic…
B. A representation of an object, system, or process
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question 2 of 10 which type of energy is stored in a battery? a. electr…
D. Chemical energy
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17. complete the table about solutions, suspensions, and colloids. solu…
17. | Type of Mixture | Relative Size of Largest Particles | Homogeneous or Heterogeneous? | Do Particles Scatter Light? | | ---- | ---- | ---- | ---- | | Solution | Small | Homog…
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what is the purpose of using chemical properties to identify matter? to…
To identify substances based on their reactivity
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what is a mixture? a substance made of only one type of atom a compound…
A combination of two or more pure substances
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10. what is a compound? 11. circle the letter of each sentence that is …
10. A substance formed when two or more elements are chemically combined in a fixed proportion. 11. a. A compound always contains at least two elements. b. The substances that mak…
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the effects of the maillard reaction are not just about color, however.…
The Maillard reaction is a chemical reaction that occurs between acids and sugars, causing foods to brown and gain a rich flavor. This process enhances the smell and taste of cert…
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what is the purpose of chromatography in the context of mixtures? to se…
To separate components based on their solubility
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which of the following is a method to separate mixtures? melting filtra…
B. Filtration
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what is the main focus of the \formative assessment\ section in the doc…
To evaluate students' understanding of mixtures and pure substances
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what is a pure substance made of? different compounds mixed with elemen…
A single element or compound
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in the early 1900s, what did scientists begin to isolate and identify? …
New states of matter
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question 4 of 25 which two explanations are based on personal beliefs? …
D. People who perform good deeds are better than people who do not. E. The relative positions of the Sun, Earth, and stars can affect human events.
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which physical property is most useful in determining the identity of t…
B. Density
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what is an example of an extensive property? mass boiling point color d…
A. Mass
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what is the purpose of using flow charts in chemistry, as mentioned in …
To visually organize information
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pure substances (page 39) 1. is the following sentence true or false? e…
1. True 2. a. Elements b. Compounds 3. A pure substance that cannot be broken down into simpler substances by chemical means. 4. True 5. Because all of its atoms have the same num…
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page 9 of 10 question 9 which is an example of a molecule that has pola…
E. water
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pure substances pure substances have a fixed chemical composition. ever…
D. all of the above
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who used scientific investigations to study atoms? choose three correct…
Democritus, Thomson, Rutherford, Dalton
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what is the first step that should be taken when responding to a chemic…
C. Contain the hazard
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3 tries left which element is necessary to create an all - over pattern…
the repetition of a set of ordered elements
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ion ionic radius cs⁺ 167 pm f⁻ 133 pm based on the data in the table, w…
C
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which of the following diagrams best depicts the structure of a typical…
A. Option A shows an alternating pattern of positive and negative ions, which is characteristic of the structure of a typical ionic solid. Options B, C, and D do not have the corr…
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based on periodic trends, which of the following diagrams best depicts …
B.
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ion ionic radius cs+ 167 pm f− 133 pm based on the data in the table, w…
A.
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which of the following statements is true of an atom with an atomic num…
The atom has 15 electrons. The atom has 15 protons.
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which of the following diagrams best depicts the structure of a typical…
A.
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models of molecules one molecule of an element: o₂ one molecule of a co…
molecule, compound
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select all that apply organic molecules must contain □ hydrogen □ oxyge…
carbon
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in a saltwater solution, the salt is the ________ while the water is th…
B. solute, solvent
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select the model that best represents atomic theory after rutherfords r…
B.
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cs+ 167 pm f- 133 pm based on the data in the table, which of the follo…
B.
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fill in the blank question the atomic mass of an atom is the sum of plu…
protons, neutrons
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what is the most abundant inorganic substance in the human body? o base…
D. Water
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multiple choice question a 1 or 2 - letter shorthand representation of …
B. chemical symbol
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which of the following diagrams best depicts the structure of a typical…
B.
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select all that apply the atomic number specifies how many ____ are in …
C. protons E. electrons
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why do atoms have an electronically neutral charge? proton and electron…
Proton and electron charges cancel each other.
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select all that apply which of the following substances are considered …
Water, Salts
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3 tries left which color scheme did jennifer bartlett use in path? jenn…
A. monochrome
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3 of 53 concepts completed fill in the blank question an element with a…
12
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the basic structure of an atom can best be described as protons and neu…
electrons orbiting a nucleus of protons and neutrons
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multiple - choice question. when a neuron releases a chemical messenger…
neurohormone
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in which of the following ionic compounds is the force of attraction be…
B. $RbI$
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according to the ihub chemistry materials, what do scientists specifica…
Question 3: a. They look for molecules in outer space because molecules give off energy that scientists can detect. Question 4: a. What do we need to know to figure out what subst…
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the graph below shows the potential energy as a function of internuclea…
A. Carbon monoxide, $C\equiv O$
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question 3 (1 point) according to the ihub chemistry materials, what do…
A. They look for molecules in outer space because molecules give off energy that scientists can detect.
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elements are composed of small units called. need help? review these co…
atoms
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what is the molar mass of the ionic compound mg3n2? mg3n2 = ? $\frac{g}…
100.95
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the energy required to separate the ions in a nacl crystal lattice into…
D. $Na^{+}$ has a smaller ionic radius than $Rb^{+}$, so the distance between cation and anion is shorter in $NaCl$ than in $RbCl$
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which of the following arranges the bonds in order of decreasing bond l…
C. $C = S>C = O>C\equiv O$
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the same molecule may be used as either a neurotransmitter or a hormone…
True
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what is the molar mass of the ionic compound na2s? na2s = ? $\frac{g}{m…
78.05
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which of the following arranges the bonds in order of decreasing bond l…
C. $C = S>C = O>C\equiv O$
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molar mass of ionic compounds 11 na 22.99 16 s 32.07 what is the molar …
78.05
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question 1 (1 point) what is the main overarching question that the \se…
Question 1: b. How should we search for life beyond Earth? Question 2: a. Are we alone?
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molar mass of ionic compounds 8 o 16.00 29 cu 63.55 what is the molar m…
79.55
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molar mass of ionic compounds 16 s 32.07 47 ag 107.88 what is the molar…
$247.83$
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which of the following correctly shows the bond polarity? choose 1 answ…
C. $\delta +\text{P}-\text{N}^{\delta -}$
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element electronegativity h 2.2 n 3.0 f 4.0 cl 3.2 se 2.6 i 2.7 based o…
B. Cl - F > H - I > Se - N
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19 multiple choice 1 point what is the phenomenon of water sticking to …
C. Cohesion
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which of the following best predicts the type of bond that forms betwee…
C. Ionic
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18 multiple choice 1 point when seawater freezes into ice below 32 degr…
A. Ice Expansion
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based on the graphic of the periodic table, how do the properties of me…
# Explicación paso a paso: ## Paso 1: Resumir la pregunta Se pide comparar propiedades de metales y no - metales y completar una tabla de un elemento. ## Paso 2: Propiedades de me…
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which of the following bonds is likely to have the most ionic character…
C. K−Cl
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scientific discoveries are often built on the previous findings of othe…
Atoms contain negatively charged particles. The electron has a specific mass.
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15 true or false 1 point the chemical formula for water is nh3+. true f…
False
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matching section. water is used to remove dirt from surfaces, it is kno…
Water is used to remove dirt from surfaces, it is known as the - Universal solvent What is a measure of a fluids resistance to flow? - Viscosity
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periodic table elements example: 74 - atomic number w - symbol tungsten…
- **Elemento con número atómico 79 (Au)**: - Nombre: Oro - Categoría: Metal - **Elemento con número atómico 27 (Co)**: - Nombre: Cobalto - Categoría: Metal - **Elemento con número…
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multiple select question select all that apply what design characterist…
A. Plenty of white space C. A consistent scheme for headings and format D. A simple layout
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question 7 which of these treatments would commonly be labelled “orthod…
Question 7: Chemotherapy Question 8: Reflexology Question 9: biofeedback
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12 multiple choice 1 point in the water molecule h2o, the hydrogen atom…
A. Covalent Bond
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based on the law of conservation of energy, which of the below is true?…
Energy cannot be created or destroyed by ordinary chemical or physical means.
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after which action would the concentration of a solution remain constan…
removing solution from the container
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calcium, magnesium, and strontium are near each other on the periodic t…
C. strontium, calcium, magnesium
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a mother finds her daughters mug of hot cocoa on a table an hour after …
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.
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which statement is the best explanation for the graph? (1 point) as tem…
As temperature rises, gas particles are moving faster and may leave the solution.
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which have different numbers of electrons? different ions of an element…
A. different ions of an element
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which radioactive isotopes did the curies discover? polonium and radium…
polonium and radium
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which option is a microscopic property that helps determine whether or …
polarity
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who was the first chemist to organize elements by atomic number? johann…
C. Henry Moseley
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sonya is studying a nonmetal element. she learns that the element is li…
C. fluorine (F)
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which substance is an example of a nonpolar compound? (1 point) vegetab…
vegetable oil
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which metal is most likely to form more than one kind of positively - c…
nickel (Ni)
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where are alkaline earth metals found on the periodic table? group 1 gr…
B. Group 2
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which element is most likely to carry electric current easily? o tin (s…
tin (Sn)
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which option correctly shows the concentration of h₃o⁺ ions in pure wat…
C. $1.0\times 10^{-7}\ mol/L$
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which pattern in electronegativity do elements in the periodic table di…
Electronegativity increases from left to right within a row of the periodic table.
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the model below shows an atom of an element. what is the atomic number …
8
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name each of the organic molecules below. structure name
1. cyclohexane 2. cyclobutane 3. cyclobutane
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use the reaction to answer the question. hcl + h₂o → cl⁻ + h₃o⁺ which s…
HCl is an acid, and Cl- is its conjugate base.
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which scientist believed that the probable, not exact, location of the …
D. Schrödinger
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name: alexis doumiguer date: 9/4/25 period: 4 lab quiz: separation of a…
1. b. evaporation (boiling) 2. d. flammability 3. a. filtration 4. Decanting is carefully pouring off a liquid from a solid or denser liquid without disturbing the settled layer b…
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tag each carbon atom in the main chain of the molecule drawn below.
The carbon atoms in the main - chain need to be numbered sequentially starting from 1 for identification purposes. Without a specific way to show the tagging in this text format (…
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which statement best describes the difference between a substance with …
The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
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how are acids and protons related? (1 point) an acid can donate protons…
An acid can donate protons to a base when they react.
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2 multiple choice 1 point what type of bonds holds one water molecule (…
D. Hydrogen Bond