Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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multiple - choice question what color should the burner be? blue yellow
A. Blue
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multiple - choice question what steps should be followed when lighting …
Light the match, turn on the gas, put the match to the side of the barrel of the burner
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chemical equation: caco₃ → cao + co₂ number of atoms for each element t…
- For $CaCO_3 ightarrow CaO + CO_2$: - Number of atoms for each element: Ca: 1 - 1, C: 1 - 1, O: 3 - 3. Total number of atoms: 5 - 5. Follows law of conservation of mass. - For $C…
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chemical equation: caco₃ → cao + co₂; number of atoms for each element:…
| Chemical Equation | Number of atoms for each element | Total number of atoms | Does this equation follow Law of Conservation of Mass? | |---|---|---|---| | $6CO_2 + 6H_2O ightar…
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intro to the periodic table - questions instructions: use the periodic …
1) Francium (Fr) 2) Tellurium (Te) 3) Gold (Au) 4) Neon (Ne) 5) Aluminum (Al) 6) Metal 7) Metalloid 8) Non - metal 9) Metal 10) Non - metal 11) Non - metal 12) Group 18 13) Group …
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acetylene gas is not explosive. true false 5 of 5
B. False
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question 11 (3 points) discussion question 3) what determines the numbe…
C. The paint markings (precision of the markings) on the graduated cylinder dictate the decimal places for that tool. Record 1 decimal of uncertainty after the certain markings on…
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tracy makes a list of energy transformations that occur as an engine ru…
3. Chemical energy transforms into gravitational potential energy.
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which best describes how energy changes form in a cars engine? a single…
C. Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy
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which energy transformations occur when a candle burns? thermal energy …
Chemical energy transforms into thermal energy and radiant energy
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atomic theory concept check name: marylie 1. fill in the table with a b…
1. Bohr: Proposed atomic model with electron orbits. Heisenberg: Uncertainty principle. De Broglie: Electron wave - like properties. Schrodinger: Wave mechanics and equation for e…
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bohr heisenberg de broglie schrodinger 2. what are the four parts of da…
1. All matter is made of atoms, which are indivisible and indestructible (not fully accepted). 2. All atoms of a given element are identical in mass and properties (not fully acce…
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what are the safety concerns in the laboratory? chemistry 1. analyze an…
| Name | Safety Rule Broken | Potential Hazard | |--|--|--| | Bill | Not wearing goggles | Chemical splashes or debris in eyes | | Tom | Eating/drinking in lab | Ingestion of chem…
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which of the following are characteristics of ancient greek architectur…
beauty, harmony, and proportion
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bbb. acid donates a proton (h+) = molecule that is formed when a brønst…
bbb. Conjugate base ccc. Carbonyl group ddd. London dispersion force eee. Ester fff. Dodeca - ggg. Imine hhh. Covalent bonds iii. Nitrile jjj. Undeca - kkk. Disulfide lll. Meth - …
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(slide#7) explain what are covalent bonds are and provide an example (s…
- Slide #7: Covalent bonds are chemical bonds that involve the sharing of electron pairs between atoms. For example, in a water molecule ($H_2O$), the oxygen atom shares electrons…
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isotopic abundance - practice problems the atomic mass for each element…
2. The atomic mass of copper is $63.3446$ amu. 3. The atomic mass of silicon is $28.0893$ amu. 4. The atomic mass of gallium is $69.6446$ amu. 6. The atomic mass of lead is $207.2…
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2. ____________ is also called central or union government. 3. the mini…
1. The Government of India 2. 25 3. Question Hour 4. The President 5. Member of Legislative Assembly 6. 30 7. 6 years 8. Ahmedabad 9. The power or authority of a court to hear and…
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question 2 (2 points) from part 2 of the density experiment, you record…
Graduated cylinders are more precise because they have smaller and more closely - spaced volume markings, allowing for more accurate volume readings compared to beakers.
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a graduated cylinder contains 15.75 ml of water. a metal that weighs 2.…
$1.10$
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chest pain that is exacerbated by exercise and is relieved by rest is m…
coronary ischemia
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5) (nh₄)₃po₄ 6) naclo₃
$Na^+ + ClO_3^-$
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3. ocean currents ch.- 16 state government ✴ fill in the blanks. 1. ind…
1. 28, 8; Central or Union Government; 25; Question Hour; Governor 2. Member of Legislative Assembly; 30; 6 years; Ahmedabad; The power or authority to make legal decisions and ju…
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according to the law of conservation of mass, if an atom of element a h…
a. 16 units
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which of the following statements support the law of mass conservation …
c. Atoms can be rearranged
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a reaction of heating potassium permanganate produces potassium mangana…
$1.6$
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a reaction between ammonia gas and chlorine gas produces ammonium chlor…
$30.2$
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4. how could you separate tellurium dioxide, teo₂, from sio₂? 5. how co…
4. Use a strong - base solution (e.g., $NaOH$) to dissolve $TeO_2$, filter off $SiO_2$, and then precipitate $TeO_2$ by adjusting pH. 5. Treat the mixture with $NaHCO_3$ solution,…
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2.56 g of hydrogen reacts completely with 20.32 g of oxygen to form x g…
22.88 g
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write the formula for each compound. capitalization and subscripts are …
selenium tetrafluoride: SeF₄ oxygen difluoride: OF₂ dinitrogen monoxide: N₂O phosphorus trichloride: PCl₃
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magnesium (24.30 g) reacts with hydrogen chloride (x g) to produce hydr…
$72.92$
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a reaction of 22.85 g of sodium hydroxide with 20.82 g of hydrogen chlo…
33.38
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give the systematic names of these compounds. spelling counts. cui(s): …
Copper(I) iodide Iron(III) oxide Cobalt(II) fluoride Iron(II) oxide
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calcium carbonate, caco₃, decomposes when heated to calcium oxide (cao)…
44
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a reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2…
$10.112$
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a reaction of heating calcium carbonate produces calcium oxide and carb…
4.4
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determine the formulas for these ionic compounds. copper(i) bromide: co…
copper(I) bromide: $\text{CuBr}$ copper(I) oxide: $\text{Cu}_2\text{O}$ copper(II) bromide: $\text{CuBr}_2$ copper(II) oxide: $\text{CuO}$ iron(III) bromide: $\text{FeBr}_3$ iron(…
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a nurse is collecting data from a client who is receiving chemotherapy …
A. Stomatitis
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bb. = chemical species that donates an electron pair in a chemical reac…
bb. Lewis base cc. Intermolecular forces dd. Dipole - dipole force ee. Isomer ff. Tetradeca - gg. Acyl chloride hh. Electronegativity ii. Nona - jj. Thioether kk. Alcohol ll. Octa…
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general chemistry 4th edition mcquarrie · rock · gallogly university sc…
sodium sulfite: $Na_2SO_3$ potassium phosphate: $K_3PO_4$ silver sulfate: $Ag_2SO_4$ ammonium nitrate: $NH_4NO_3$
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question 15 of 20 what is the chemical formula for the compound formed …
Formula for potassium - iodine compound: KI Formula for potassium - oxygen compound: $K_2O$
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write the chemical formula for the compound formed by each pair of posi…
Ba(NO₃)₂ Al₂(CO₃)₃ K₃PO₄
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determine the name or formula for each polyatomic ion. formula: co₃²⁻ n…
1. carbonate 2. $SO_{3}^{2 - }$ 3. $SO_{4}^{2 - }$ 4. cyanide
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the table below shows the atomic mass of three isotopes of uranium (u).…
The number of neutrons in the nucleus
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the periodic table consists of a stair - step or zig - zag line near th…
It helps to identify the location of the nonmetals, metals, and metalloids.
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17. list the vocabulary word for the following a. hex = systematic nami…
a. Hex - b. Ether c. Atomic number d. Oct - e. Constitutional isomers f. Ketone g. Lewis acid h. Isotope i. Nonadec - j. Acid dissociation constant ($K_a$) k. Pent - l. Nomenclatu…
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for each problem below, write the equation and show your work. always u…
1. $10132.5\ g$ 2. $11\ g/cm^{3}$ 3. $186567.2\ mL$ 4. $22\ mL$ 5. $118.4\ g$ 6A. $25.8\ mL$ 6B. $16.4\ mL$ 6C. $24\ mL$
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look at the molecule shown below. what can you tell me about this molec…
1. The molecule is a disaccharide. 2. An enzyme can break a glycosidic linkage via a hydrolysis reaction.
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in the given three - dimensional molecular structure, the differently c…
$C_7H_7NO_2$
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there are two naturally occurring isotopes of boron. $^{10}$b has a mas…
$^{10}\text{B}$ abundance: 20% $^{11}\text{B}$ abundance: 80%
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on another planet, the isotopes of titanium have the given natural abun…
$46.905$
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question 20 which of the following is incorrect? fda attempted to prohi…
C. Composting is not allowed in organic foods.
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multiple choice question the chemical name for the four forms of vitami…
O tocopherols.
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on another planet, the isotopes of titanium have the given natural abun…
$46.90$
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an atom or ion has 41 neutrons, 36 protons, and 36 electrons. identify …
element symbol: Kr mass number: 77 charge: 0
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question 15 which of the following is incorrect? organic foods cannot b…
Organic foods cannot be treated with natural pesticides.
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question 14 2 pts the potential risk from either organic or locally gro…
False
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15. how many electrons are found in the s - sublevel? 1s²2s²2p⁶3s²3p⁶4s…
15. d. 8 16. c. d
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identify the missing information for each atom or ion. note that the at…
number of neutrons: 44 number of protons: 34 number of electrons: 36 element symbol: Cu number of protons: 29 number of electrons: 28
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select all the true statements. the cl⁻ and br⁻ ions have the same numb…
The K⁺ ion is formed when a potassium atom loses one electron. The Fe²⁺ and Fe³⁺ ions have the same number of protons.
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word problems 1. a block of aluminum occupies a volume of 15.0ml and we…
1. $2.7g/mL$ 2. $13.6g/mL$ 3. $157.8g$ 4. $\approx8.92g/cm^{3}$ 5. $\approx238.1cm^{3}$ 6. $219.125g$ 7. $\approx11.3g/cm^{3}$ 8. $\approx7.92g/mL$
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3. in the following chemical equation - label the reactants and product…
3. Reactants: $CH_4, 2O_2$; Products: $CO_2, 2H_2O$ 4. $CH_4$: 1 molecule; $O_2$: 2 molecules; $CO_2$: 1 molecule; $H_2O$: 2 molecules 5. Conservation of matter is shown as the nu…
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c.) bromine symbol: total # of electrons: (hint: in a neutral atom elec…
C. Bromine: Symbol: Br Total # of Electrons: 35 Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵ D. Nickel: Symbol: Ni Total # of Electrons: 28 Electron Configuration: 1s²2s²2p⁶3…
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conservation of mass what information is given in a chemical equation? …
The chemical equation provides information about the identities of reactants and products, the mole - ratios of reactants and products (from coefficients), the number of atoms of …
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conservation of mass what information is given in a chemical equation? …
The chemical formulas of the reactants and products.
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claim - evidence - reasoning phase change as a physical change a substa…
**Revise the Claim**: A phase change is a physical change as the chemical identity of the substance remains constant throughout the change in its state. **Reassess the Evidence**:…
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which of the following statements is/are true: statement 1: when the st…
Statements 1 & 3
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grade/element: date: dr. jassal questions 26 - 35: label each of the fo…
26. M 27. C 28. D 29. F 30. S 31. E 32. S 33. E 34. S 35. C 36. C. pressure
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question 6 of 10 < points possible: 1.00 a student is trying to measure…
More than one of the above answers is correct
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name: date: questions 17 - 25: identify each particle diagram as solid …
17. S 18. G 19. L 20. L 21. G 22. S 23. G 24. S 25. L
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what does it mean to prime a mohr pipet? select one: to submerge the ti…
When one or two samples of the solution that is to be measured are drawn into the tip using a pipet pump
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5. which type of change can be more easily reversed: chemical or physic…
### Question 5 Physical changes can be more easily reversed. Example of physical change: melting ice; Example of chemical change: burning wood. ### Question 6 - b. Physical Proper…
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rate the following pieces of glassware from most precise to least preci…
C. Mohr Pipets > Graduated Cylinders > Beakers
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3. when a substance melts or boils, is it a physical or chemical change…
It is a physical change.
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claim - evidence - reasoning phase change as a physical change a substa…
1. Initial claim: A phase change is a physical change. Evidence: Water freezing into ice, water boiling into steam. Reasoning: Physical change is a change in form/state without al…
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9 sebastian tells his longtime friend joe that he found an easy get - r…
A. That Joe's standards or moral values of what is right and wrong would keep him from getting involved
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claim - evidence - reasoning phase change as a physical change a substa…
1. **Claim**: A phase change is a physical change. 2. **Evidence**: When dry ice (solid CO₂) sublimates directly into a gas; When mercury melts from a solid to a liquid. 3. **Reas…
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6. find the following elements on your periodic table. record what ener…
6a. 3 6b. 5 6c. 6 6d. 4 7. c. 2 8. d. 32 9. b. 1p 10A. Symbol: \(Na\); Total # of Electrons: 11; Electron Configuration: \(1s^{2}2s^{2}2p^{6}3s^{1}\) 10B. Symbol: \(P\); Total # o…
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3. when a substance melts or boils, is it a physical or chemical change…
3. Physical change 4a. Chemical change 4b. Chemical change 4c. Physical change 4d. Physical change 4e. Chemical change 4f. Physical change 4g. Physical change 5. Physical changes …
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4. use what you have learned about chemical and physical changes to ide…
a. Chemical change b. Chemical change c. Physical change d. Physical change e. Chemical change f. Physical change g. Physical change 5. Physical change can be more easily reversed…
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points possible: 1.00 select the true statement: a buret... select one …
A. measures how much titrant has been dispensed when you read the meniscus correctly
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name______ date______ period:______ electrons configurations ws 1. in t…
2. a. s = 1, p = 0, d = 0, f = 0, total = 1 b. s = 1, p = 3, d = 0, f = 0, total = 4 c. s = 1, p = 3, d = 5, f = 0, total = 9 d. s = 1, p = 3, d = 5, f = 7, total = 16 3. e. 2 f. …
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a student is trying to measure 3.00 ml of water with a mohr pipet. they…
2.992 mL
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determine which of the following statements are true? statement 1: prim…
Only statement 1 is true
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8. complete the table | particle | location of particle | charge on par…
8. See completed table above. 9. Protons; Atomic number 10. Element 11. Protons; Neutrons 12. See completed table above.
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2. below is a representation of the solvation process (e.g., water diss…
It is a physical change. The chemical identities of the solute and solvent remain unchanged during the dissolution process, and no new substances are formed.
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snowball had made a close study of some back numbers of the “farmer and…
B. Napoleon does not listen to Snowball's ideas. D. Napoleon says that the improvements will never happen. E. Napoleon seems to be waiting for Snowball's plans to fail.
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unit 1 a: matter: the atom homework 1. matter is defined as: 2. who 1st…
1. Anything that has mass and takes up space. 2. Democritus. 3. a) Mass b) Volume 4. i. Solids ii. Liquids iii. Gases 5. i. Protons ii. Neutrons iii. Electrons 6. (Answer depends …
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6. explain this sentence in your own words: \i cant think but it must h…
The speaker is convinced that the others had a pre - planned conspiracy, as they find it hard to believe that the others could have attacked the King's troops so promptly and amas…
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4. write the balanced equation for the double displacement reaction tha…
The balanced equation is $2Na_3PO_4 + 3MgCl_2=6NaCl+Mg_3(PO_4)_2$. The mass of $NaCl$ is $12.27\ g$ and the mass of $Mg_3(PO_4)_2$ is $9.20\ g$.
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practice: 3. determine how many grams of hydrogen are needed to produce…
$5.055\ g$
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1.5 bell ringer: proof of earth’s formation and layers 1. what is the p…
1. S - waves cannot pass through it. 2. Asthenosphere. 3. Information about Earth's early chemical composition. 4. Sedimentary rock and fossil evidence. 5. The asthenosphere is se…
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select the correct answer. which energy source is formed when organic m…
B. coal
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3) look at boron. it has two possible isotopes. based on the average at…
The $^{11}B$ isotope is most abundant in nature because the average atomic mass of boron (10.81) is closer to the mass - number of $^{11}B$ (11) than to the mass - number of $^{10…
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read the following attention getter from a former student: have you eve…
Ask a question(s)
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chapters 1 - 2 - 3 and 4 decreased temperature increased temperature ab…
Rate of Reaction DECREASES (1/2): Decreased temperature, Absence of enzymes, Decreased concentration of reactants Rate of Reaction INCREASES (2/2): Increased temperature, Presence…
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determine the quantity of atoms of vanadium in 1.28 grams of vanadium
$1.52\times 10^{22}$ atoms
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practice: scientific method read each scenario and answer the questions…
1. Independent variable: Presence of bread in the container 2. Dependent variable: Moistness of brownies 3. Hypothesis: If a piece of bread is placed in the brownie container, the…
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determine the quantity of moles of propylene (c₃h₆) in 25.0 g of the su…
$0.594$
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2.1 the nature of matter 1. the basic unit of matter is the 2. what is …
1. Atom 2. Nucleus 3. Protons and neutrons 4. Electrons 5. Carbon, Hydrogen, Sodium 6. Oxygen, Nitrogen, Sulfur 7. Neutrons 8. Unstable nucleus 9. A substance formed when two or m…