Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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try again your answer is wrong. please read the explanation for more he…
4
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answer the questions in the table below about this molecule: what is th…
What is this molecule's chemical formula? $C_5H_{10}O$ How many $CH_3$, $CH_2$, and $CH$ groups are in this molecule? 2 $CH_3$, 1 $CH_2$, 2 $CH$
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why might soils rich in organic matter not be fertile? a. soil fertilit…
a. Soil fertility comes from a balance of organic matter and other mineral nutrients.
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read the excerpt from sonnet 29. when, in disgrace with fortune and men…
D. abab
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1. draw four protons in the atom to the right. label them with their ch…
4. Beryllium (Be) 5. The number of protons (4) determines the element, and beryllium has an atomic number of 4. 7. The atomic number on the periodic - table gives the number of pr…
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★ part 2 → matter and energy in the biolite answer the questions below,…
1. a. Energy - b. Matter - c. Energy - d. Matter 2. Matter has mass and occupies space; energy is the ability to do work and exists in various forms. 3. Wood, food (and other phys…
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physical vs. chemical properties a physical property is observed with t…
| Property | Physical Property | Chemical Property | |--|--|--| | 1. blue color | √ | | | 2. density | √ | | | 3. flammability | | √ | | 4. solubility | √ | | | 5. reacts with aci…
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utilizing ultisols for agriculture requires. a. extensive irrigation b.…
c. adding organic matter to supplement the shallow horizons
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practice: isotope calculations #1 part 1: use the notation below to ans…
1. Isotopes 2. Mass - numbers 3. Neutrons 4. $^{12}C$: 6, $^{13}C$: 7, $^{14}C$: 8 5. Protons 6. 6 7. Nuclear notation 8. Hyphen notation 9. Carbon - 12, Carbon - 13, Carbon - 14 …
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what pictogram would you see on a corrosive product?
A. The pictogram with liquid affecting metal and hand
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which of the following is not true concerning cover crops? a. they prev…
C. they are sold as cash crops
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chemical bonds choose the correct answer. what type of bond occurs when…
a covalent bond
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8. when sugar molecules are used to build larger molecules, like amino …
B. Energy is transferred as chemical bonds are formed or broken. C. The chemical elements are rearranged to form new molecules.
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an irregular chunk of iron has a density of 7.87 g/cm³. a 14.5 gram chu…
37.6 mL
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7. examine the image of an exothermic reaction below. which of the foll…
D. The energy of the products is lower than that of the reactants.
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chemical bonds choose the correct answer. what property does hydrogen b…
stability
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chemical bonds choose the correct answer. what is a negatively charged …
anion
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chemical bonds (storing and releasing energy) chemical bonds electrons …
Interactions between atoms that are sharing, donating, or receiving electrons
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choose the correct answer. some covalent bonds create molecules with pa…
B. Polar
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6. which equation best represents the conservation of matter? (1 point)…
D. $6H_2O+6CO_2 ightarrow C_6H_{12}O_6+6O_2$
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choose the correct answer. what type of bond occurs when two elements s…
Covalent
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soil fertility is best described as being dependent upon _. a. the bala…
A. the balance between organic matter and mineral nutrients
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what type of bond occurs when an element gives an electron to another e…
B. Ionic
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practice: atom and the periodic table vocabulary match the terms below …
1. j. Average atomic mass 2. e. Electron cloud 3. f. Nucleus 4. d. Neutrons 5. m. Group 6. c. Protons 7. l. Valence electrons 8. o. Periodic Table 9. k. Isotopes 10. g. Quark 11. …
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choose the correct answer. what type of reaction requires energy to cre…
Endergonic
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what type of reaction releases energy when the bond is broken? exergoni…
Exergonic
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3. which of the following are the primary elements found in sugar molec…
A. Hydrogen B. Carbon D. Oxygen
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2. what is the definition of a hydrocarbon? (1 point) choice a polysacc…
C. a large chain of carbons and hydrogens bonded together
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question 23 --- bonds are responsible for binding atoms together within…
Van der Waals, Covalent
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question 22 bonds are the only primary bonds that are directionally dep…
Covalent
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how is over - irrigation damaging to soil? a. it reduces the amount of …
B. It results in the accumulation of salt near the soil surface.
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using the figure below, calculate the percent ionic character of the in…
(a) 46.0% (b) 46.0%
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what type(s) of bonding would be expected for rubber? ionic bonding cov…
Covalent bonding with some van der Waals bonding
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which of the following soil properties is not influenced by microorgani…
D. none of the above
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what type(s) of bonding would be expected for brass (a copper - zinc al…
Metallic bonding
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activity: crossword puzzle across: 3. i have 6 valence electrons and 16…
(Actual filling of crossword requires visual - based work and cannot be fully provided here. But elements are: 1. Silver (Ag, atomic number 47), 2. Iron (Fe, 26 protons), 3. Sulfu…
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the property of refers to a metals ability to be hammered or rolled int…
malleability
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is the ability of a metal to be drawn out into a thin wire, a property …
Ductility
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in metallic bonds, unlike ionic or covalent bonds, electrons are not be…
Shared
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to improve the safety of your location and comply with regulations rega…
Download them from the chemical manufacturer's websites.
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why do metals typically have lower electronegativity compared to nonmet…
C. Metals lose electrons easily.
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which suffix indicates a sugar? -ase -ose
-ose
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which metal property is directly influenced by the presence of delocali…
A. High electrical conductivity
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question 9 of 10 read this appeal: not only is meat more expensive than…
B. The local school board
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passionate shepherd to his love christopher marlowe come live with me a…
C. 7 quatrains with an aabb rhyme scheme
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question 15 of 25 which model would be classified as a physical model? …
B. Marshmallows and toothpicks that are used to show the composition of a water molecule
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the blank rule is a chemical rule of thumb that reflects the observatio…
Octet Rule
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fluorine has 7 valence electrons. which charge is its ion likely to hav…
1-
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when moving across a period from left to right in the periodic table (e…
Valence electrons increase by one.
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based on the naming rules for ions, which of the following is a negativ…
B. chloride
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a scientist has 40 liters of a 50% acidic solution. she adds a 20% acid…
None of the provided options are correct. The correct amount is 80 liters.
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the actual structure of a molecule is best described as a resonance
hybrid
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fill in the missing items in the table below. complete the table. use a…
| Element | Protons | Neutrons | Electrons | Mass - number | |---|---|---|---|---| | $^{36}S$ | 16 | 20 | 16 | 36 | | $Fe$ | 26 | 23 | 26 | 49 | | $^{27}Al$ | 13 | 14 | 13 | 27 | …
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chemistry: section 203 > week 4 september 2 - 5, 2025 thursday, septemb…
14
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fill in the missing items in the table below. complete the table. use a…
| Symbol | Atomic Number | Mass Number | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | ---- | | $^{23}$Na | 11 | 23 | 11 | 11…
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bonds quick check which type of bond and how many bonds would occur as …
A. four covalent bonds
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which kind of bond would occur between sodium (na, group ia) and chlori…
ionic
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between which types of elements do ionic bonds occur, and how do electr…
C. metals and nonmetals, electrons transferred
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bonds quick check metallic bonds are responsible for many properties of…
The bonds can shift because valence electrons are held loosely and move freely.
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what type of bond causes the kink in the tails of unsaturated fats? dou…
Double Bond
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kayla and emma are best friends, and theyre at emmas house studying for…
A. Emma must decide whether or not to help Kayla cheat on the chemistry test.
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bell ringer for thursday 9/4: why is it crucial to use the appropriate …
It is crucial to use the appropriate SI prefix when collecting data in a chemistry experiment because it ensures accuracy, ease - of - understanding, and avoids calculation and re…
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identify the element based on the information below: it is a metalloid …
Boron (B)
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19 identify the element based on the information below: located in peri…
niobium (Nb)
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identify the element based on the information below: located in period …
Potassium (K)
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given the information below identify the element: nonmetal. belongs to …
Chlorine
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which of the following is a metal in the alkaline earth metals family? …
B. Barium (Ba)
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15 which element is not a representative element/main group element (s …
C. Technetium (Tc)
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14 identify the element based on the information below. located in peri…
Boron (B)
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identify the element based on the information below: 25 electrons. is a…
Manganese (Mn)
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which marketing message would be most effective for a target audience o…
"New organic pesticides; proven to reduce fruit - eating pests by 70%"
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12 which group consists of unreactive gases? a alkali metals b alkaline…
E. Noble Gases
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which detail best supports the idea that in this futuristic setting the…
The detail "it's a constant war these days against the dust that sweeps across the city limits, piling worst in dead ends and cul - de - sacs" best supports the idea that the land…
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11 which groups are included in the main group elements and contain at …
A. Group 1 D. Group 13 E. Group 14 F. Group 15 G. Group 16 H. Group 17 I. Group 18
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identify the element based on the information below. has a mass less th…
Helium
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9 which of the following elements is in period 3? a lithium (li) b boro…
D. Phosphorus (P)
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8 what is the alkali metal with the smallest mass? a hydrogen (h) b lit…
B. Lithium (Li)
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7 identify the element based on the information below: it is a gas, has…
Oxygen
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which group contains highly reactive metals with two valence electrons?…
B. Alkaline Earth Metals
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5 identify the element based on the information below: located in perio…
Scandium (Sc)
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4 which element is not part of the transition metals? a magnesium (mg) …
A. Magnesium (Mg)
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3 identify the element based on the properties below: nonmetallic, loca…
Sulfur (S)
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2 which of the following are there the least of on the periodic table? …
C. Metalloids
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exercises: 1. how many ounces are in 0.824 kilograms? 2. convert 925.3 …
1. Approximately 29.07 ounces 2. Approximately 31.29 fl oz 3. 9144 centimeters 4. 9427.552 J 5. Approximately 1.614 miles 6. Approximately 5.28 quarts
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what is the process of building polymers called? monomerization polymer…
polymerization
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10. what are the 4 states of matter? a. solid, liquid, gas, and plasma …
10. a. Solid, liquid, gas, and plasma 11. c. They move more freely 12. b. plasma 13. b. They are all still composed of H₂O. 14. a. Increasing temperature 15. d. Freezing point 16.…
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what is one type of synthetic polymer that is used on a daily basis? he…
plastic
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4) what is the mass of the gas that exactly fills a 200.0 ml container?…
$250\ cm^{3}$
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1. what is matter? choose the best answer. a. anything that is solid b.…
1. b. Anything that has mass and takes up space 2. c. Liquids don't have a definite shape; solids do 3. d. The particles move faster and faster and begin to spread causing the wat…
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review of element names and symbols *practice by writing the element na…
Se: Selenium Ca: Calcium Ag: Silver Kr: Krypton Cr: Chromium Co: Cobalt
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sch3u chemistry review 1.a) define the term \pure substance\ and give o…
1.a) A pure substance has a fixed or definite composition. Example: Gold (Au). 1.b) A mixture is a combination of two or more substances that are not chemically combined. Example:…
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8. between______and______, the population of europe more than doubled. …
8. c. 1700 and 1800 9. d. Louis Pasteur 10. a. Joseph Lister 11. b. Florence Nightingale
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which type of bond does carbon most commonly form? covalent bonds hydro…
covalent bonds
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part 2 (everyone): parts of an atom instructions: identify each compone…
Protons: Positive charge; Neutrons: No charge; Electrons: Negative charge
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when atoms react, they often lose, gain, or share electrons to form a m…
D. 8A
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note taking guide: episode 304 name quantum numbers used to describe an…
$n$: main, electron; $2n^{2}$; $l$: angular - momentum, shape, shell; $2l + 1$; $s$: 2, $p$: 6, $d$: 10, $f$: 14
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periodic table the periodic law states that: a. the periodic table arra…
D. The properties of elements recur periodically when arranged by increasing atomic number.
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what are the safety concerns in the laboratory? chemistry critical thin…
1. no; Lab glassware may be contaminated and not for drinking. 2. yes; Reporting frayed cord avoids electrical hazard. 3. yes; Wearing goggles protects eyes from acid. 4. no; Bare…
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how does carbon achieve a stable electron configuration and fulfill the…
forming covalent bonds
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what type of carbon bond strengthens the stability and functionality of…
sigma bonds