Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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question 1 of 10 how have safety concerns about chemicals changed over …
B. As scientists have learned more about chemicals, they have become more aware of their dangers.
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what is the volume of 26.82 grams of copper if the density of copper is…
3 mL
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a scientist is conducting an experiment in which they measure the amoun…
Quantitative Observation
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5. classify each example below as the type of matter it is (element, co…
a. Mixture b. Compound c. Compound
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question 1 1 pts which of the following is the electron configuration o…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{9}$ (assuming the normal orbital - filling order as presented in the options and not the more stable actual configurati…
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practice it tendency to focus on only one aspect of a situation at a ti…
B. centration
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4. classify each example below as the type of matter is it (element, co…
a. Compound b. Heterogeneous mixture c. Element d. Homogeneous mixture e. Compound f. Compound g. Heterogeneous mixture h. Homogeneous mixture
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3. fill in the flowchart below using the following terms: matter, subst…
Left branch (top - down): Substance, Element, Compound Right branch (top - down): Mixture, Heterogeneous, Homogeneous
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practice it process of incorporating new objects or situations into exi…
D. assimilation
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1. explain the main difference between a compound and mixture
A compound is a pure - substance with fixed element ratios formed by chemical bonds. A mixture is a physical combination of substances with variable ratios.
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1 multiple choice 1 point which is true of watersheds? all watersheds a…
1. Watersheds are determined by natural slopes and water will flow downhill. 2. All of these are human impacts on watersheds.
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practice it mental framework for understanding or acting on the environ…
D. schema
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fill in the blank: fill in the blank with the correct words. 1. a_ is a…
1. scientist 2. laws 3. theory 4. scientific 5. scientists
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1 multiple choice 1 point which is the best description of the differen…
(1) weathering is breaking down into smaller pieces, erosion is carrying it away (2) topsoil
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1.2 formative (soil formation & erosion) 1 multiple choice 1 point whic…
1. weathering is breaking down into smaller pieces, erosion is carrying it away 2. topsoil
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3. which is not a type of scientist? • a) biologist • b) chemist • c) h…
C. Historian
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question 6 (1 point) saved listen i can learn about the hazards of spec…
A. reading the Safety Data Sheet
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question 10 (1 point) saved listen who should wear safety goggles in th…
D. Everyone in the lab - space
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question 9 (1 point) listen when using gloves as personal protective eq…
b) wear two pairs of gloves to increase protection
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who developed the following atomic model and what is it called? - bohr …
B. Thomson & Plum Pudding Model
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question 8 (1 point) listen orderliness can help prevent accidents in t…
D. pour all chemicals into a single container to limit the amount of cleaning needed
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which of the following is not true about waste disposal in the lab? a) …
C. Paper towels, gloves, and weigh boats should be added to the waste containers with chemicals.
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resonance is the concept that some molecules cannot be adequately repre…
True
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***4.*** of the following choices, choose the correct word that best re…
C. freezing
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***17.*** the pressure exerted by the gas in equilibrium with a pure li…
C. Vapor pressure
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when water evaporates in a closed container, water vapor collects above…
A. Liquid
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solid liquid gas plasma
solid
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is the phase change in which a substance changes from a solid to a gas …
B. Sublimation
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which three phase changes are exothermic? a. freezing, condensation, de…
A. freezing, condensation, deposition
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***20.*** any energy gained by the water after a phase change the avera…
C. Increases, rises
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3. of the following choices, choose the correct word that best represen…
C. a transition directly from vapor phase to solid phase, deposition
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question 7 which of the following statements is false? a when a substan…
C. When a substance CONDENSES, it changes from a liquid to a gas.
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of the following choices, choose the correct word that best represents …
D. vapor pressure
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of the following choices, choose the correct word that best represents …
boiling
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***2.*** of the following choices, choose the correct word that best re…
deposition
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***11.*** during a phase change, a substance undergoes a(n) a. reversib…
A. reversible change from one state to another
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what is the phase change in which a solid is converted directly to a ga…
B. sublimation
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why does ice change to water as energy is added at the melting point? a…
C. Molecules vibrate quicker, and their motion overcomes the forces of attraction.
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***19.*** * any energy removed after the freezing is complete the avera…
B. decreases, drops
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***5.*** of the following choices, choose the correct word that best re…
melting
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part 3: label the lab equipment instructions: label the following commo…
1. Eyewash station 2. Fire blanket 3. Chemical - spill kit 4. First - aid kit 5. Fire extinguisher 6. Heat - resistant gloves
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draw the lewis electron dot structures based on their location on the p…
Magnesium (Mg): 2 dots; Sulfur (S): 6 dots; Carbon (C): 4 dots; Argon (Ar): 8 dots; Nitrogen (N): 5 dots; Aluminum (Al): 3 dots; Helium (He): 2 dots; Oxygen (O): 6 dots; Hydrogen …
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what must be conserved in all resonance structures? a. the formal charg…
B. The total number of electrons.
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check the statements that are a part of the early atomic theory. check …
- Atoms combine in whole number ratios to form compounds. - Atoms cannot be created or destroyed during a chemical reaction.
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mark the statement as true or false. all of the proposed ideas by dalto…
false
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which of the following statements is true about the elements labeled a …
B - Element A forms a 2 - ion, and element B forms a 1+ ion.
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a proton is added to carbon? a proton is removed from carbon a neutron …
A neutron added: Carbon - isotope; A neutron removed: Carbon - isotope; An electron added: C⁻; An electron removed: C⁺; Element: Carbon; Number 6: Atomic number; 12, 13, 14: Mass …
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vaporization is the process of a liquid becoming a gas. as a liquid hea…
Vaporization
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when you boil water, what is happening to the particles? the particles …
The particles speed up.
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choose the correct answer. when a gas changes to a liquid, what happens…
the gas particles LOSE energy
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choose the correct answer. when a liquid changes to a gas, what happens…
the liquid particles GAIN energy
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choose the correct answer. when a liquid changes to a solid, what happe…
the liquid particles LOSE energy
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the following bohr model diagrams describe the number of electrons in d…
(No options given for first part. For second part) Valence
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the following bohr model diagrams describe the number of electrons in d…
A. Option A
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the following bohr model diagrams describe the number of electrons in d…
B. Incorrect model (no details given about why in image, but assume it violates electron - shell rules), valence
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list 3 elements that are in the same group: a vertical column. what do …
- Three elements in same group: Lithium, Sodium, Potassium - Members of a group have same number of valence electrons.
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circle a different term that doesnt belong with the other terms in the …
Atomic Mass. Proton, Atomic Number, and Electron are related to atomic particles; Atomic Mass is about atom's mass.
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using patterns on the periodic table, write out the standard long - for…
1. Na: $1s^{2}2s^{2}2p^{6}3s^{1}$ 2. S: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}$ 3. N: $1s^{2}2s^{2}2p^{3}$ 4. Fe: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{6}$ 5. I: $1s^{2}2s^{2}2p^{6}3s…
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periodic table organization: how are elements arranged in the modern pe…
1. By increasing atomic number. 2. Increases. 3. A vertical column. 4. Hydrogen, lithium, sodium. 5. Same number of valence electrons.
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atomic mass = number of __________________ in the atom atomic number = …
Atomic Mass: protons and neutrons Atomic Number: protons
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what is the purpose of previewing the poem in the poetry reading proces…
For the first question: To make predictions about the poem's content based on the title. For the second question: To understand the rhythm and meaning of the poem.
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solutes and solvents quick check why does a higher temperature usually …
The molecules move faster.
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solutes and solvents quick check which substance is an example of a non…
D. vegetable oil
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use the graph to answer the question. which statement is the best expla…
As temperature rises, gas particles are moving faster and may leave the solution.
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consider the following row in the periodic table of elements: li be b c…
- Which elements are the most likely to conduct electricity? Li, Be - Which elements are gases at room temperature? F, Ne - Which elements are most likely to be malleable and duct…
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solutes and solvents quick check a mother finds her daughters mug of ho…
The cocoa was mixed with hot water, but some cocoa settled as it cooled because the solubility went down.
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after which action would the concentration of a solution remain constan…
removing solution from the container
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atomic structure the atom has 3 subatomic particles: symbol location ch…
| | Protons | Neutrons | Electrons | |--|--|--|--| | Symbol | p⁺ | n⁰ | e⁻ | | Location | Nucleus | Nucleus | Electron - shells | | Charge | +1 | 0 | -1 | | Mass | 1 amu | 1 amu |…
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atomic structure valence electrons 1 which statement best describes the…
There are two electrons in the first energy level and seven electrons in the second energy level
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7. in the hunger games, because of his cruelty. 8. the ____ ordered the…
8. judge 9. compensation 10. annul
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which element has atoms with valence electrons in a higher energy level…
Cesium (Cs)
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helium is in group 18 of the periodic table. how is helium different fr…
Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.
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two representative elements, nitrogen and oxygen, are in the same perio…
They have valence electrons in the same energy level.
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3. determine whether each statement is something that stays the same or…
a. SAME b. DIFFERENT c. SAME d. DIFFERENT e. SAME f. SAME or DIFFERENT g. SAME h. SAME or DIFFERENT
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how many valence electrons does each atom of arsenic (as) have? arsenic…
5
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what is a period? • list 3 elements that are in the same period: • what…
What is a period?: A horizontal row in the periodic table List 3 elements that are in the same period: Li, Be, B What do members of a period have in common?: Same number of electr…
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periodic table organization: how are elements arranged in the modern pe…
How are elements arranged in the modern periodic table?: By increasing atomic number What happens to the number of valence electrons as you move from left to right across the peri…
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4. compare the concentration of solute in the first test tube on the le…
4. B. The first test tube has a higher concentration 5. Ice (solvent) melts, diluting solute, decreasing concentration.
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periodic table organization: how are elements arranged in the modern pe…
How are elements arranged in the modern periodic table: By increasing atomic number. What happens to the number of valence electrons as you move from left to right across the peri…
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periodic table organization; how are elements arranged in the modern pe…
How are elements arranged in the modern periodic table?: By atomic number. What happens to the number of valence electrons as you move from left to right across the periodic table…
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3. compare the four solutions in the diagram in terms of the amount of …
D; A; D
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what is the name of the acid whose formula is h₂co₃? spell out the full…
Part C: Formic acid Part D: $H_2SO_3$
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question 3 which action is caused by gravity? ice wedging chemical weat…
Mass wasting
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naming binary acids when naming acids, start by naming the anion. a mon…
hydroiodic acid
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read the passage. how do architects use math to ensure that their build…
The question encourages the reader to challenge preconceptions they might have about math being irrelevant to standards of beauty.
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• elements that can form four polyatomic oxyanions (plus others in addi…
$\text{HClO}_2$
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important groups: | | alkali metals | alkaline earth metals | halogens …
| | Alkali Metals | Alkaline Earth Metals | Halogens | Noble Gases | |--|--|--|--|--| | Group Number | 1 | 2 | 17 | 18 | | Valence Electrons | 1 | 2 | 7 | 8 (2 for He) | | What ty…
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use the passage from the ant, the butterfly, and their chemical warfare…
By using a mixture of descriptive and sequential text structure to demonstrate the interconnected nature of the ants, butterflies, and oregano plants
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part b what is the systematic name of nh₄clo₃? view available hint(s) a…
Lead(II) oxide
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what is the systematic name of mg(no3)2? view available hint(s) submit …
Part A: magnesium nitrate Part B: ammonium chlorate Part C: lead(II) oxide
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part c enter the formula for the compound beryllium oxide express your …
Part C: $BeO$ Part D: $Co_{3}(PO_{4})_{2}$
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list the properties of metals, nonmetals, and metalloids
Metals: Good conductors, malleable, ductile. Non - Metals: Poor conductors, often brittle. Metalloids: Intermediate properties.
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part a give the systematic name for the compound nano₃ spell out the fu…
Part A: Sodium nitrate Part B: Manganese(III) sulfate
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question 4 1 pts which formation is the result of wind erosion? glacial…
Question 4: Unusually shaped rocks Which action is caused by gravity: Mass wasting
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29 of 100 which action by the nurse is best when handling a chemotherap…
C. Double glove and wear protective gown
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classify the following compounds as having covalent or ionic bonds. dra…
Covalent bonds: carbon tetrachloride, dinitrogen monoxide Ionic bonds: barium fluoride, magnesium chloride, rubidium oxide, aluminum carbide
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part a which of the following would you expect to be a molecule and whi…
Molecular: NO, HBr, SO₂, CO Ionic: RbCl, BaS, LiBr, LiCl
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3. a chemical change can best be described as ____. a change that is re…
D. a change that results in a new substance
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2. some examples of a physical change include all of the following exce…
C. baking a cake
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periodic table study guide fill out the chart: | | na | br | kr | ca | …
| | Na | Br | Kr | Ca | S | Ga | Sb | |---|---|---|---|---|---|---|---| | Atomic # | 11 | 35 | 36 | 20 | 16 | 31 | 51 | | Period | 3 | 4 | 4 | 4 | 3 | 4 | 5 | | Group # | 1 | 17 |…