Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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properties of water 13 what is water made of? h2o 14. what does polar m…
15. Oxygen atom. 16. Oxygen has partial negative charge; hydrogen has partial positive charges. 17. Hydrogen - bond. 18. High specific heat, cohesion, adhesion, surface tension, g…
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? n…
1715
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in geology, weathering refers to processes that break down rocks into s…
physical weathering
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2. consider the following reaction to answer the questions below: 8zn(s…
The limiting reactant is \(Zn\).
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the models show the chemical structures of a fatty acid and a monosacch…
| | Fatty acid | Monosaccharide | |--|--|--| | Is a building block of triglycerides | Yes | No | | Contains hydrogen | Yes | Yes | | Has carbon atoms arranged in a ring | No | Yes…
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question 5 what stretching frequencies (in cm⁻¹) are present in the str…
1715
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? o…
1655
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the profit, in dollars, made by selling x bottles of 100% all - natural…
The number of bottles $x$ must satisfy the interval $[10,30]$. So, the largest interval containing all possible answers is $[10,30]$.
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the profit, in dollars, made by selling x bottles of 100% all - natural…
25
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if you drop an object from twenty feet, it might shatter on the floor. …
Chemical potential energy
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2. a compound is analyzed and found to contain 68.54% carbon, 8.63% hyd…
2. Molecular formula: $C_{8}H_{12}O_{2}$, Empirical formula: $C_{4}H_{6}O$ 3. Empirical formula: $C_{3}H_{6}O_{2}$ 4. Empirical formula: $CH_{4}N_{2}O$
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layla mixed flour and water, and the flour clumped together in the wate…
Using a coffee filter
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note: round your ratio of moles to the nearest whole number as long as …
Empirical formula: $C_{4}H_{6}O$; Molecular formula: $C_{8}H_{12}O_{2}$
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part b: write the nuclear symbol (11 - 15) write the full nuclear symbo…
11. $_{15}^{31}P$ 12. $_{19}^{39}K$ 13. $_{82}^{207}Pb$ 14. $_{6}^{12}C$ 15. $_{92}^{235}U$
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part c arsenic express your answer in complete form, in order of increa…
$1s^22s^22p^63s^23p^64s^23d^{10}4p^3$
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read the text. chemists have various tests to learn about unknown subst…
pH test
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for a science experiment, mr. duncan mixed 0.00055 pounds of sulfur and…
B. $1.59\times 10^{-3}$ pounds
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complete the graphic organizer to describe the signs that indicate a ch…
| Sign of Chemical Change | Example | |--|--| | Change in color | Toast turning black when burnt | | Production of gas | Vinegar and baking - soda reaction producing carbon - diox…
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which three elements are found in every carbohydrate? phosphorus nitrog…
oxygen, carbon, hydrogen
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nickel express your answer in complete form, in order of increasing orb…
1s^22s^22p^63s^23p^64s^23d^8
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read the text. solutions are combinations of two or more evenly mixed s…
precipitate
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which three elements are found in every lipid? some lipids contain addi…
Hydrogen, Carbon, Oxygen
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1. a compound consists of 72.2% magnesium and 27.8% nitrogen by mass. w…
The empirical formula is $Mg_3N_2$
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chemical changes read the text and use a highlighter to identify: - the…
- Sentence defining chemical change: In a chemical change, one or more new substances are formed. - Two examples: Burning a match; Rusting - Sentences explaining the process: Duri…
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part d: mixed practice (21 - 25) 21. an isotope of hydrogen with 2 neut…
21. $_{1}^{3}H$ 22. $_{92}^{238}U$ 23. $_{20}^{40}Ca^{2 + }$ 24. $_{33}^{75}As$ 25. $_{35}^{80}Br$
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the mass of a hydrogen atom is about 1.67e - 24 grams. the mass of a pl…
C. $2.43\times10^{2}$
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read the text. during world war i, british and american warships were a…
sequential
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name elfidio mejía date 9/18/25 a. percentage composition percent compo…
1. For \(H_2O\): \(\%H\approx11.19\%\), \(\%O\approx88.81\%\) 2. For \(Al_2(CO_3)_3\): \(\%Al\approx23.07\%\), \(\%C\approx15.46\%\), \(\%O\approx61.47\%\) 3. For \(C_6H_{12}O_6\)…
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who wrote the love of money is the root of all evil? saint christopher …
1. C. Saint Paul (the Apostle Paul) 2. C. Au
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changing state describe what happens to the energy and speed of particl…
Heating a substance: Increases; move faster Cooling a substance: Decreases; move slower For the drawing: - In the solid state (ice), draw $H_2O$ particles closely packed in a regu…
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complete the table. | | stearin | triolein | |--|--|--| | is a saturate…
| | stearin | triolein | |--|--|--| | is a saturated fat | Yes | No | | is likely solid at room temperature | Yes | No | | is an unsaturated fat | No | Yes | | is likely liquid at…
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triglyceride). stearic acid how many molecules of stearic acid are need…
3
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complete the table to compare triglycerides, phospholipids, and sterols…
| | Triglycerides | Phospholipids | Steroids | |--|--|--|--| | have carbon atoms arranged in long chains | Yes | Yes | No | | have carbon atoms arranged in rings | No | No | Yes |…
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learning goal 1. describe physical changes in terms of the arrangement …
Matter is composed of tiny particles called atoms. In elements, all atoms are of the same type, such as carbon, oxygen, iron, or gold. In compounds, atoms of different types are b…
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select the true statements. in steroids, carbon atoms are arranged in r…
In steroids, carbon atoms are arranged in rings; Steroids contain oxygen atoms; Steroids are chemical messengers.
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phospholipids are another type of lipid. they are the building blocks o…
- Carbon atoms are arranged in two long chains in phospholipids. - Phospholipids contain nitrogen and phosphorus atoms.
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physical change and particles describe what happens to particles during…
All matter is made up of tiny particles called atoms. In elements, the atoms are all the same type, such as carbon, oxygen, iron, or gold. In compounds, atoms of different types a…
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question 5 which of the following is used to calculate the vapor pressu…
B. mole fraction
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question 9 why does adding a non - volatile solute change the boiling p…
The solution needs a higher temperature to match its vapor pressure with atmospheric pressure.
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question 8 when a non - volatile solute is dissolved in a solvent, it m…
A. increase, decrease
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question 7 what is boiling point? the temperature of a burner on which …
the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure
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select the polysaccharide.
The top - most structure is the polysaccharide.
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question 6 which factor is not considered in determining colligative pr…
Type of solute
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question 4 why is the vapor pressure of a solution lower than that of a…
The solution has a lower number of solvent molecules evaporating.
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select the true statements. maltose has the same number of carbon atoms…
1. Maltose has the same number of carbon atoms as sucrose and lactose. 2. Maltose, lactose, and sucrose all contain glucose. 4. Maltose is found in rye and barley.
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question 3 what role does a non - volatile solute play in the vapor pre…
It decreases the vapor pressure.
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compare the chemical structures of lactose and sucrose. | | lactose | s…
| | lactose | sucrose | |--|--|--| | has 12 carbon and 11 oxygen atoms | Yes | Yes | | is a disaccharide | Yes | Yes | | contains the monosaccharide fructose | No | Yes |
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question 2 which of the following is a colligative property change in a…
Vapor pressure lowering
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in plant cells, glucose and fructose can react to form sucrose. plants …
- Disaccharides are made by joining two monosaccharides. - Plants with high levels of sucrose are used to make granulated sugar.
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question 1 what is a colligative property? a property of a liquid that …
a property of a solution that depends on the number of particles dissolved
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galactose. compare glucose, fructose, and galactose. select the true st…
Glucose, fructose, and galactose are monosaccharides. All three molecules have six carbon atoms.
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carbohydrates are also known as saccharides. the word saccharide is a t…
$C_6H_{12}O_6$
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question 5 which step determines the overall reaction rate? the first s…
the slowest step
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question 4 which of the following is true about activated complexes? th…
They exist only during the transformation of reactants to products.
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15 the nitrogen cycle key question what processes are involved in the c…
(a) Nitrogen - fixing; $N_2$ to $NH_4^+$ (b) Ammonification; Organic nitrogen to $NH_4^+$ (c) Nitrification (first step); $NH_4^+$ to $NO_2^-$ (d) Nitrification (second step); $NO…
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question 3 what is a reaction intermediate? a substance that appears in…
A substance that is produced by an early step and consumed in a later step.
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question 2 the steps in a reaction mechanism are called ______ reaction…
A. elementary
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question 1 a reaction mechanism is the balanced equation representing a…
The step - by - step sequence of elementary processes during a chemical reaction.
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9. write the unabbreviated (full) electron configuration for the sulfid…
9. Electron configuration of $S^{2 -}$: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$, Noble gas: Ar 10. Electron configuration of Cu: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}$. It is an e…
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9 write the unabbreviated (full) electron configuration for the sulfide…
1. Electron - configuration of $S^{2 - }$: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$; Noble gas: Ar 2. Electron - configuration of Cu: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{10}$; Except…
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several elements are outlined on the periodic table. which of these ele…
Nitrogen, Phosphorus, Antimony
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question 5 plotting the inverse of the reactant concentration against t…
C. A second - order reaction
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b. directions select all the correct answers. several elements are outl…
Nitrogen (N), Phosphorus (P), Antimony (Sb)
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question 4 for a first order reaction, if we graph lna vs. t, we get a …
-k
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question 3 in a straight - line plot of a zero - order integrated rate …
Initial reactant concentration
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an atom of a certain element contains 9 protons and 7 valence electrons…
Part A: The element is fluorine (F) and it is highly reactive. Part B: Protons are used to identify elements and the 7 valence electrons make the element highly reactive.
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question 2 how are integrated rate laws for zero, first, and second ord…
B. They can all be plotted to generate a straight line.
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question 1 the integrated rate law shows the relationship between _____…
C. Reactant concentration; time
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10. which of the following list the elements in order, from those havin…
N, P, As, Sb, Bi
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chemical reactions 1. a is a process that changes, or , one set of comp…
1. Chemical reaction; transforms 2. Reactants; Products 3. Changes; Chemical bonds
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1. write the unabbreviated (full) electron configuration for a neutral …
1. $1s^{2}2s^{2}2p^{6}3s^{1}$ 2. Sulfur (S) 3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$ 4. Cobalt (Co) 5. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$, it is a noble - gas configuration (full outer s…
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review the lab report conclusion and then answer the question. based on…
to record an experiment and demonstrate learning
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sketching atoms using the bohr model sketch the following atoms, placin…
| Atom | Protons | Neutrons | Electrons | Electron Distribution in Bohr - model | | ---- | ---- | ---- | ---- | ---- | | H | 1 | 0 | 1 | 1 in n = 1 | | He | 2 | 2 | 2 | 2 in n = 1…
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severe chest pain associated with coronary artery disease is diagnosed …
C. angina
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question 2 10 points each of the following sets of quantum numbers is s…
B. \(n = 4, l = 3, m_l=-2\)
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question 16 what term describes a decreased supply of oxygenated blood …
A. Ischemia
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directions: answer the 3 questions about each chemical formula on the l…
| Formula | Question 1 | Question 2 | Question 3 | | ---- | ---- | ---- | ---- | | $Fe_2Cl_3$ | 2 | 5 | 2 | | $Pb_5CaK_3Al$ | 1 | 10 | 4 | | $C_6H_{12}O_6$ | 6 | 24 | 3 | | $NO_2C…
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the average human body contains a total of 7×10^27 atoms. the table sho…
$4.181\times 10^{27}$
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? 1…
1685
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in a chemical change, gases, heat, or light are often released and the …
Physical change - Definition: A substance changes in size, shape, or state, or two substances are mixed together without changing their chemical composition. Usually reversible. E…
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what is the stretching frequency (in cm⁻¹) of the following carbonyl? o…
1715
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unit 1 - earth’s abiotic systems - unit review resources to help you re…
1. Asthenosphere 2. Plate tectonics 3. Divergent 4. Subduction 5. Transform; they are sliding past each other 6. Soil 7. Humus 8. Physical 9. more; less 10. thin; harder 11. Over …
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the halogens group group #: draw the example atom and make the outermos…
- **Halogen Group**: - Family Members: F (9), Cl (17), Br (35), I (53), At (85) - 5 properties/trends: High electronegativity, 7 valence electrons, form salts with metals, non - m…
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which of the following carbonyls have a stretching frequency around 171…
The aldehyde and the ketone options have carbonyl stretching frequencies around 1715 cm⁻¹. So the correct answers are the aldehyde - containing option and the ketone - containing …
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algal blooms occur due to the presence of an excess amount of nutrients…
The nutrients are a part of the fertilizers that are often washed away into ponds.
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this is an orbital diagram for the element... (use the element symbol o…
Se
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how many electrons are in this atom? energy
17
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how many electrons are in this atom?
12
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question 11 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³6s² select state number …
state: Ground state number of electrons: 55 element: Cesium (Cs)
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question 10 1s²2s²2p⁶3s²3p⁶ select state number of electrons= select el…
state: Ground number of electrons: 18 element: Argon (Ar)
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what stretching frequencies (in cm⁻¹) are present in the structure belo…
1745
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problem give iupac names for the following cycloalkanes: 4 - 1 (a) (b) …
(a) 1,4 - dimethylcyclohexane (b) 1 - methyl - 3 - propylcyclopentane (c) isopropylcyclobutane (d) 2 - ethyl - 6 - bromobicyclo[3.2.0]heptane (e) 1 - methyl - 4 - isopropylcyclohe…
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question 9 1s²2s²2p⁶3s²3p⁶4s²3d⁶4p² select state number of electrons= s…
state: Ground state number of electrons: 30 element: Zinc (Zn)
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question 8 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁶5p³ select state number of el…
state: ground state number of electrons: 47 element: Ag
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ss2 warmup: what does the law of conservation of energy state? give two…
The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another. Examples: Chemical energy in a battery to electrica…
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what is the stretching frequency (in cm^-1) of the following carbonyl? …
1685
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question 6 what is the stretching frequency (in cm⁻¹) of the following …
1715
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19. which choice completes the text so that it conforms to the conventi…
B. Ice Ih contains crystals, whereas amorphous ice, which lacks the thermal energy to form them, does not.
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the nitrogen group group #: 5 draw the example atom and make the outerm…
1. Uses/Existences of Nitrogen - group members: - N: Essential for life, used in ammonia production for fertilizers. - P: Vital for life, used in fertilizers. - As: Used in semico…
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section vocabulary law a descriptive statement or equation that reliabl…
1. To make predictions, understand complex systems, and communicate ideas. 2. Physical models, mathematical models, computer - based models. 3. Scale and material. 4. A law predic…