Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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5. label the reactants, products, coefficients, and subscripts in the f…
(5) Reactants: \(6CO_{2}+6H_{2}O\); Products: \(C_{6}H_{12}O_{6}+6O_{2}\); Coefficients: 6 (for \(CO_{2}\), \(H_{2}O\), and \(O_{2}\)), 1 (for \(C_{6}H_{12}O_{6}\)); Sub - scripts…
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2. reasoning in order for an atom to have a zero charge, every proton, …
A helium atom has a zero charge because the +1 charges of its 2 protons are balanced by the -1 charges of its 2 electrons, resulting in a net - charge of 0.
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3. which of the following equations correctly rearranges the atoms to d…
3. A. \(5P + 6O_{2}\to2P_{2}O_{5}\) 4. A. Matter cannot be created or destroyed in a chemical reaction.
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1 which of the following are examples of pollutants? choose three. soil…
Soil containing fertilizers, Chemical waste from industries, Runoff containing pesticides
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2. what must happen for mass to be conserved in a chemical reaction inv…
D. The number and types of atoms must be equal both before and after a reaction since mass cannot be created or destroyed.
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how can scientists prove the conservation of mass in a chemical equatio…
By ensuring the number of atoms of each element is the same on both sides of the chemical equation through balancing coefficients.
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mixture - (variable composition) substances physically homogeneous: com…
Mixture: two or more; Homogeneous: uniformly; Solutions; uniform; salt - water; Heterogeneous: unevenly; may separate; trail - mix
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q4. uvb light is partly blocked by the ozone layer but otherwise pass t…
Q4. d Q5. c Q6. b
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day 5 fill in the missing information on each chart below using the che…
(List the Reactants) \(2TiCl_{4}, 4H_{2}O\) (List the Products) \(2TiO_{2}, 8HCl\) (How many of each atom is present in the Reactants) Ti: 2, Cl: 8, H: 8, O: 4 (How many of each a…
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incorrect your answer is incorrect. • row 1: your answer is incorrect. …
Write the symbol for this MO: $\pi$ Is this a bonding or antibonding MO? bonding What is the energy of this MO, compared to the energy of a 3p orbital on one of the separate atoms…
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determine whether the following statements are true (t) or false (f). 1…
1. F 2. T 3. T 4. T 5. F 6. F
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find any questions that you have about the phenomena we have explored s…
1. What causes the fizzing sound when the bath bomb reacts? 2. How does the composition of the bath bomb affect its color - changing properties during the reaction? 3. Why does th…
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instructions: no books, papers, or notes of any kind permitted. a scien…
Q1. B. 6 Q2. C. \(5.08\times10^{14}\ Hz\) Q3. C. Emission of a red photon.
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question 11 the mass percent (w/w%) of a solutions containing 3.5 g mgo…
$2.7$ ### Question 12
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match the following concentration units to their descriptions. 1. mass …
1. Grams of solute in 100 g of solution 2. Volume of solute (mL) in 100 mL of solution 3. Mass of solute (g) in 100 mL of solution 4. Moles of solute per liter of solution
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which choice is not an example of a molecule? ○ h₂s ○ koh ○ mn ○ o₃
Mn
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question 3 what happens to ionic compounds when they dissolve in water?…
B. They dissociate into ions
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question 8 discuss the differences between strong electrolytes, weak el…
It is important to understand these classifications in chemistry because they help predict chemical reactions, solution behavior, and are relevant in applications like water treat…
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the table below lists information about some diatomic molecules or mole…
| molecule | stable? | diamagnetic or paramagnetic? | bond order | | ---- | ---- | ---- | ---- | | $B_{2}^{-}$ | yes | paramagnetic | $\frac{3}{2}$ | | $B_{2}$ | yes | paramagneti…
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fission/fusion activity using the periodic table of elements, predict t…
1. FISSION 2. FUSION 3. FISSION 4. FUSION
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what is the hybridization of the central atom in the tribromide (br₃⁻) …
$sp^3d$
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question 16 of 20 identify the precipitate that forms and the spectator…
Precipitate: $BaSO_{4}(s)$ Spectator ions: $K^{+}(aq), NO_{3}^{-}(aq)$
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consider the chlorotrioxyl (clo₃⁺) cation. what is the central atom? en…
What is the central atom? Enter its chemical symbol: Cl How many lone pairs are around the central atom? 0 What is the ideal angle between the chlorine - oxygen bonds? 120 Compare…
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analyze the chemical reactions below. then, identify the total number o…
| Reaction | Total Atoms of Reactants | Total Atoms of Products | Atoms Equal (Yes or No) | |---|---|---|---| | 1 | Ca: 1, C: 2, O: 4 | Ca: 2, C: 2, O: 6 | No | | 2 | S: 2, O: 6, …
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answer the questions in the table below about the shape of the bromodif…
How many electron groups are around the central bromine atom? 5 What phrase best describes the arrangement of these electron groups around the central bromine atom? Trigonal bipyr…
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what is the hybridization of the central atom in the borate (bo₃³⁻) ani…
$sp^{2}$
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tag all the sp³ hybridized carbon atoms in this molecule. if there are …
The left - hand carbon atom (the one with three H atoms attached) is $sp^3$ hybridized.
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answer the questions in the table below about the shape of the azide (n…
How many electron groups are around the central nitrogen atom? 2 What phrase best describes the arrangement of these electron groups around the central nitrogen atom? Linear
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answer the questions in the table below about the shape of the tetrachl…
What word or two - word phrase best describes the shape of the $ICl_4^-$ anion? Square planar What is the angle between the iodine - chlorine bonds? (If there is more than one ang…
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question 8 discuss the differences between strong electrolytes, weak el…
Strong electrolytes fully ionize in solution (e.g., NaCl). Weak electrolytes partially ionize (e.g., CH₃COOH). Nonelectrolytes do not ionize (e.g., C₆H₁₂O₆). It is important for p…
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answer the questions in the table below about the shape of the ozone (o…
How many electron groups are around the central oxygen atom? 3 What phrase best describes the arrangement of these electron groups around the central oxygen atom? Trigonal planar
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question 7 water can dissolve both polar and nonpolar solutes. a true b…
B. False
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match the following types of mixtures to their char prompts 1 solution …
1. Homogeneous mixture of two or more substances 2. Medium particle size that does not settle out 3. Contains large particles that may settle out 4. Substance that produces ions i…
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match the following terms to their definitions. prompts: 1. strong elec…
1. Strong Electrolyte - Dissociates completely in solution 2. Weak Electrolyte - Dissociates only slightly in solution 3. Nonelectrolyte - Does not produce ions in solution 4. Sol…
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question 4 molarity is the number of moles of solute per volume of solu…
A. True
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it was a sunny sunday morning in october. ben sat on a bench in the par…
1. A sunny Sunday morning in October, a park 2. D. Man vs. Self 3. B. Man vs. Nature
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question 1 the process of helps solute particles become surrounded by s…
The first blank: solvation; The second blank: become surrounded by solvent molecules
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stopping the fentanyl trade will be highly difficult for world leaders.…
1. B. Many experts think the drug trade's huge profits make it likely that a crackdown in one place will just lead to new sources of supply. 2. D. studied 3. A. Fake versions of A…
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directions: answer the questions below. 1. a ____ is a process in which…
1. Reacción química 2. b. Productos 3. Evolución de gas, cambio de color, liberación o absorción de calor 4. b. Enlaces químicos
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question 2 of 12 > compare solution x to solution a, solution b, and so…
Solution A
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18. how many grams of nacl (molar mass= 58 g/mol) are needed to prepare…
D. 1.5 g ### 19.
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1. calculate the % water in cuso₄·5h₂o from the formula. 2. did you det…
$36.1\%$ ### 3.
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draw the molecular orbital (mo) electron diagram for the f₂⁺ molecular …
Draw an energy - level diagram with the above - mentioned orbitals in order of increasing energy. Place 2 electrons in $\sigma_{1s}$, 2 in $\sigma_{1s}^*$, 2 in $\sigma_{2s}$, 2 i…
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chemistry h - koenig - 02 - 06 (lms) investigation test: the periodic t…
1. Na 2. Al, Mg ions 3. O
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which statements are true concerning elements in the same group of the …
A. They have similar properties. F. They have the same outer shell electron configuration.
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the search is now on for element with atomic number 119. based on perio…
D. It would most likely form cations when it reacts.
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study the following sketch of a molecular orbital (mo) in a homonuclear…
| Property | Answer | |--|--| | Write the symbol for this MO | $\pi^*$ | | Is this a bonding or antibonding MO? | antibonding | | What is the energy of this MO, compared to the en…
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1 according to kinetic - molecular theory, collisions between gas parti…
11. 4 12. 3 13. 2 14. 2 15. 4
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physical properties are characteristics that can be observed without ch…
The yarn ball is a solid.
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which procedure could a student use to examine an intensive property of…
Determine the density.
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to rent a certain meeting room, a college charges a reservation fee of …
$t<10$
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to rent a certain meeting room, a college charges a reservation fee of …
$t<5$
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1. why did the volume of the gas molecules increased in the balloon aft…
The gas particles inside the balloon were more densely packed together in the model of air in the balloon before it is warmed up by the heating pad. We know this because when a ga…
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to rent a certain meeting room, a college charges a reservation fee of …
$t\leqslant7$
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read this excerpt from walt whitmans poem \i hear america singing\ from…
A. present a poem with a natural, conversational rhythm.
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drag the words/phrases to complete the sentences. alkali metals are hig…
reactive, lose 1 electron
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arrange the following elements, from top to bottom, in the correct orde…
Te, Sb, In, Sr, Rb
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arrange the following atoms, top to bottom, in the correct order of inc…
Cs, Rb, K, Na, Li
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with the exception of he, how many valence electrons do noble gases hav…
D. 8
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which characteristic is not a periodic trend? a. atomic radius b. ioniz…
C. Number of elements in a group
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which of the following is classified as a compound? * silicon dioxide h…
C. water
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review progress question 8 of 15 the noble gas is most likely element c…
1: Element 1
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review progress use the figure to answer questions 10 and 11. first 3 e…
A. Ar, B. Cl, D. O
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name: ervin lopez assignment: percent error, density, & kmt 1 a student…
1. 5.58% (closest to option D in problem 1) 2. 10% (option 4 in problem 2) 3. 3. nitrogen (option 3 in problem 3) 4. 4. Ni (option 4 in problem 4) 5. 4. The volume of the gas part…
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use the figure to enter the correct symbol for the elements. an element…
1. S 2. Al³⁺, Mg²⁺ 3. O
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the united nations declared the year 2019 as the year of the periodic t…
A. It is relatively unreactive. C. It has a full valence shell of electrons.
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study the following sketch of a molecular orbital (mo) in a homonuclear…
Write the symbol for this MO: $\pi$ Is this a bonding or antibonding MO? bonding What is the energy of this MO, compared to the energy of a 3p orbital on one of the separate atoms…
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the united nations declared the year 2019 as the year of the periodic t…
A. have 7 shells of electrons
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the united nations declared the year 2019 as the year of the periodic t…
D. It would most likely form cations when it reacts.
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a lab experiment begins with 500 milliliters of a chemical solution. th…
A. 330 milliliters
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an environmental scientist is investigating the volatility of 175 organ…
105
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multiple choice 15 points what holds metallic bonds together? the oppos…
Free flowing electrons in between the atoms
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look at this sentence: if you want to work in this chemistry lab, you m…
3. to act in agreement with: Please listen carefully and follow the directions.
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fill in the blank 15 points a metal is a answer consisting of closely -…
1. solid 2. valence 3. not 4. nonlocalized 5. positive 6. electrical
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multiple choice 15 points what is an alloy? solid homogeneous mixture f…
Solid homogeneous mixture formed by dissolving one solid in another solid
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multiple answer 15 points select all of the following that applies to m…
B. Sea of Electrons, C. Delocalized Electrons
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true or false 5 points metals form covalent bonds with other metals. tr…
False
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multiple answer 15 points. which of the following are properties of met…
They lose electrons to become Cations They have luster Good conductors of heat and electricity High melting and boiling points They are malleable and ductile Low ionization energy…
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notes quiz and practice - metallic bonding 1 multiple choice 5 points m…
B. cations
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look at this sentence: if you want to work in this chemistry lab, you m…
3. to act in agreement with: Please listen carefully and follow the directions.
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name kimberly lemos p5 date clay math crossword puzzle: chemistry acros…
Across: 1. Electron 5. Reaction 6. Plasma 9. Neutron 11. Noble 13. Mass 14. Carbon Down: 2. Two 3. Proton 4. Hydrogen 6. Periodic 7. Metal 8. Nucleus 10. Number 12. Ion
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23. complete the table. | | atomic size | ionization energy | electrone…
| | Atomic Size | Ionization Energy | Electronegativity | |--|--|--|--| | Definition | The distance from the nucleus to the out - most electron shell of an atom | The energy requi…
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nitrogen what is the atomic number? what is the mass number? what is th…
\(1s^{2}2s^{2}2p^{3}\)
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2.3 bohr models name: directions: draw bohr models for each element lis…
# Explanation: ## Step1: Recall atomic number for protons The atomic number of an element is equal to the number of protons. Sodium (Na) has an atomic number of 11, so the number …
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24. complete the table about element properties. | | metals | nonmetals…
| | Metals | Nonmetals | Metalloids | |--|--|--|--| | Properties | 1. Good conductors of heat and electricity <br> 2. Have a luster <br> 3. Malleable and ductile | 1. Poor conduct…
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2.3 bohr models directions: identify the bohr models.
Top - left: Silicon (Si); Top - right: Fluorine (F); Bottom - left: Calcium (Ca); Bottom - right: Boron (B)
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24. complete the table about element properties. | | metals | nonmetals…
| | Metals | Nonmetals | Metalloids | |--|--|--|--| | Properties | 1. Good conductors of heat and electricity <br> 2. Malleable <br> 3. Ductile | 1. Poor conductors of heat and el…
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what happens when sodium undergoes a chemical reaction with chlorine? t…
1. A new compound is formed called salt. 2. Toxic 3. A change on the molecular level
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what can you infer about the changes that formed the grand canyon? they…
1. C. They were physical changes. 2. B. Through a chemical reaction between iron and oxygen
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a chemist combines water and isopropanol to make a mixture with a volum…
28
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he called all his people together and told them his daring scheme. sour…
A. plan
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the police union regards the move as an insult that ______ officers cou…
D. implies
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13 multiple choice 1 point what does it mean when there is a physical c…
13. Matter has changed size, shape or form. 14. Food being broken down by enzymes in your stomach 15. Food being broken into small pieces by your teeth
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11 multiple choice 1 point which of the following is an example of a ph…
1. Water freezing into ice 2. A chemical change
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dry ice has the same chemical properties as what gas? helium hydrogen n…
1. D. Carbon Dioxide 2. B. They bounce around randomly.
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6 multiple choice 1 point the melting point of h₂o is 0 degrees celsius…
6. D. Freezing point 7. A. Sublimation
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what do water vapor, liquid water, and ice have in common? the same cry…
1. D. The same chemical properties 2. A. Heating it
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what are the three main states of matter? solid, liquid, and gas ice, w…
1. Solid, Liquid, and Gas 2. They move more freely 3. Matter is anything that has mass and takes up space
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after mixing two substances together, a cloudy layer forms and powder b…
1. Chemical change 2. Physical change 3. Chemical change
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multiple answer 1 point you are baking bread in your oven. which two se…
A. sight D. smell