Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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understanding pressure and density 1. write or draw below what would ha…
1. When a cold front comes through, the cold, dense air mass pushes under the warmer, less - dense air mass. Cold air is denser because the air molecules are more closely packed t…
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electron configuration practice chemistry name: due date: h. determine …
17) Violation of Pauli - exclusion principle (3s subshell has 3 electrons instead of 2). 16) Valid 18) Valid 19) Valid 20) Valid
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electron configuration practice chemistry h. determine which of the fol…
16) Aufbau principle 17) Pauli - exclusion principle 18) No violation 19) No violation 20) No violation (assuming no further context about incomplete configuration being a violati…
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select the correct answer. in a given chemical reaction, the energy of …
B. Energy is released in the reaction.
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electron configuration practice chemistry name: due date: i. determine …
1. Nitrogen: - Full electron configuration: $1s^{2}2s^{2}2p^{3}$ - Short - hand: $[He]2s^{2}2p^{3}$ - Orbital diagram: 1s: ↑↓, 2s: ↑↓, 2p: ↑ ↑ ↑ 2. Chlorine: - Full electron confi…
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drag each tile to the correct box. not all tiles will be used. a chemic…
lower energy of reactants, transition state, higher energy of products
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select the correct answer. which chemical reaction shows photosynthesis…
A. water + carbon dioxide + sunlight → oxygen + glucose
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a chemist takes a polysaccharide and turns it into many disaccharides. …
The reaction is hydrolysis and water must be added.
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select the correct answer. some fuel cells are powered by hydrogen. sci…
A. Decomposing water requires a high activation energy.
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7. the following table shows the mass and abundance of three isotopes o…
(Mass Z x 0.15)+(Mass Y x 0.50)+(Mass W x 0.35) = Average atomic mass of J
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e. in the space below, write the full (unabbreviated) electron configur…
1) $1s^{2}2s^{2}2p^{6}3s^{1}$ 2) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{6}4s^{2}$ 3) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{5}$ 4) $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2…
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6. what is a mole in chemistry terms? a tool used to measure temperatur…
C. an SI unit for measuring the amount of a substance
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5. which of the following statements accurately compare element x and e…
- Atoms of Element X and Element Y have an equal number of valence electrons. - Atoms of Element X have fewer protons than atoms of Element Y. - Atoms of Element Y have more energ…
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which verb correctly completes the sentence? yo ____________ en interne…
C. busqué
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energy changes in chemical reactions: tutorial · you will determine the…
Carbon dioxide ($CO_2$)
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part c will the energy released in the synthesis of water equal the ene…
Yes, the energy released in the synthesis of water equals the energy absorbed in the decomposition of water due to the law of conservation of energy.
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if a scientist creates a new rock - like substance in a laboratory, why…
It's not a naturally occurring substance.
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what determines the chemical properties and physical properties of a mi…
the arrangement of the mineral's atoms
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details no additional details were added for this assignment. which fac…
C. a variable chemical composition
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under the hazard communication standard the employee is responsible for…
- Never use an unlabeled chemical - Participate in required training programs - Learn how to read and understand SDS information
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energy changes in chemical reactions: tutorial tiles chemical energy tr…
1. Temperature 2. Chemical energy 3. Chemical reaction 4. Transition state
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energy changes in chemical reactions: tutorial. drag the tiles to the c…
- a reaction that releases energy in the form of an electric current → electrochemical reaction - a reaction that uses oxygen and releases heat and light energy → combustion - a r…
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identify which are elements, compounds, or mixtures. bubble gum ○ compo…
- Bubble Gum: mixture - salt: compound - Gold: element
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bj: common applications use the information below to answer the questio…
doing something mechanical
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bj: common applications. use the information below to answer the questi…
Binder Jetting (BJ) sand molds are created faster than traditional methods
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bj: common applications use the information below to answer the questio…
giving a realistic prototype of an idea
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question select all the correct answers. some chemical reactions absorb…
Plants use sunlight and atmospheric gases to make food. A person activates a cold pack by hitting it against a surface. A rechargeable battery is plugged in to charge. Heat is use…
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simple subjects and predicates worksheet 2 in the science lab! directio…
1. Underlined: David; Circled: worked 2. Underlined: Clouds; Circled: filled 3. Underlined: David; Circled: wrote 4. Underlined: None; Circled: had worked 5. Underlined: scientist…
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question 9 1.5 pts which one of these carbohydrates is not a monosaccha…
C. Sucrose
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vitamins are inorganic elements like copper whereas minerals are comple…
False
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question 29 a struggle or clash that drives the plot is known as? confl…
Question 29: A. conflict Question 30: A. A poem consisting of 14 lines (iambic pentameter) with a particular rhyming scheme
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34 what type of electrons orbitals are dumbbell shaped? * (0.5 points) …
p - orbitals
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30 which of the following orbital notations for phosphorus is correct? …
C
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29 explain the aufbau principle. * (0.5 points) electrons occupy equal …
Electrons are added one at a time to the lowest energy orbitals available until all the electrons of the atom have been accounted for.
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28 what is the maximum number of electrons that can occupy an f - shell…
14 (C. 14)
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27 using the electron configuration, determine the highest occupied ene…
5
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26 what element has the following ground state electron configuration? …
Aluminum
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what principle is the following orbital diagram violating? * (0.5 point…
C. Hund's Rule
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23 what is the correct electron configuration for a ground - state atom…
A. 1s²2s²2p³
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7. a sample of copper with a mass of 63.5 g contains 6.02 x 10^{23} ato…
$1.055\times 10^{-22}$ g
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21 what is the noble gas configuration for oxygen? * (0.5 points) a 1s²…
D. $1s^{2}2s^{2}2p^{4}$
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3. nonmetals are located right side + hydrogen conductors not or
poor; shiny
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19 what is the atomic number of the element with the noble - gas notati…
37 (corresponds to option C if the options are numbered as C. 37 in the multiple - choice context)
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10. prepare a 0.5m solution of nacl in 100 ml of di water (molar mass o…
We will calculate the mass of NaCl required for each volume separately. **For 100 mL solution**: 1. First, convert the volume to liters: - The volume \(V = 100\ mL=0.1\ L\). - The…
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15 using the electron configuration, determine the total number of elec…
$41$
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14 what does the letter “n” represent in chemistry? * (0.5 points) plan…
energy level
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13 what principle is the following orbital diagram violating? * (0.5 po…
D. Hund's Rule
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12 using the electron configuration, determine how many electrons are i…
2
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what is hunds rule? * (0.5 points) electrons are added one at a time to…
Electrons occupy equal-energy orbitals so that a maximum number of unpaired electrons results.
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10 what does the pauli exclusion principle state? * (0.5 points) electr…
An orbital can hold a maximum of 2 electrons. To occupy the same orbital, 2 electrons must spin in opposite directions.
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9 which of the following best describes the shape of an s - orbital? * …
Spherical
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8 what principle is the following orbital diagram violating? * (0.5 poi…
B. Hund's Rule
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what is the correct noble - gas notation for the electron configuration…
D. $[Ne]3s^{2}3p^{5}$
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6 what element has this ground state electron configuration? * (0.5 poi…
Nb (Niobium)
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5 what is the highest occupied energy level in an atom of strontium in …
n=5
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in orbital notation, explain why we use up and down arrows. * (0.5 poin…
The arrows represent the spin of the electrons. They must have opposite spins to occupy the same orbital.
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1 what is the noble gas configuration for zinc? * (0.5 points) a ar4s²4…
C. [Ar]4s²3d¹⁰
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solutions and molarity 1. find the mass to prepare a 3.0% solution of s…
0.9 g
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6. what is the range of the radii of most atoms in nanometers (nm)? 5×1…
6. The range of the radii of most atoms in nanometers is \(5\times 10^{-2}\text{ nm}-0.2\text{ nm}\). 7. The mass of a single copper atom is approximately \(1.05\times 10^{-22}\te…
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question 36 (1 point) compounds that contain carbon and hydrogen bondin…
organic
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protons: 0 neutrons: 0 electrons: 0 sulfur
Protons: 16 Neutrons: 19 Electrons: 18
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skills assessment review answer the following questions pertaining to t…
1. C. Gait 2. B. Hypoglycemia 3. A. Given within 3 hours of symptom onset 4. C. Transient ischemic attack
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when a solution produces equal number of hydrogen and hydroxyl ions, it…
1. True 2. True
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atoms are the smallest particles of a compound that still retain the pr…
1. B. False 2. A. True
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column a 1. ___ type of kinetic energy represented when legs are moving…
1. f. mechanical energy 2. d. chemical energy 3. c. potential energy
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20. headaches caused by muscle contractions in the head and neck are ty…
20. D. tension headaches 21. A. hyperglycemia 22. B. airway 23. C. transient ischemic attack 24. C. AVPU
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choose the item in column two that best matches each item in column one…
1. e. Ionic bond 2. a. Polar covalent bond 3. c. Hydrogen bond
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2. a positively charged particle in an atom is the
proton
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true or false 1. atoms are mostly empty space. 2. each element has a sp…
1. T 2. T 3. F 4. F 5. F 6. F 7. T 8. F 9. F 10. F
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what is the missing coefficient to make a balanced equation? 4al + 3c →…
1
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what is the missing coefficient to make a balanced equation? 4al + ?c →…
3
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which of the following best describes the difference between a mixture …
B. A mixture can be easily separated, but a solution has substances that are evenly mixed and harder to separate.
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what is the missing coefficient to make a balanced equation? ?al + c → …
4
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5. explain how the law of definite proportions defines the composition …
5. A given compound always has elements in a fixed mass - to - mass ratio as per the law of definite proportions. 6. Compounds formed from the same elements are compared. They sha…
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1. what does the greek word for atoms mean? 2. the heavy particles of a…
1. Indivisible 2. In the nucleus 3. Empty space 4. Protons, neutrons 5. In electron - shells/orbitals around the nucleus 6. A very large number 7. The number of protons 8. The num…
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which of the following is a compound? a sodium chloride b hydrogen gas …
A. sodium chloride
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2. the ______ controls the most basic functions of the body, such as br…
2. A. brainstem 3. A. two 4. C. incontinence 5. C. an ischemic stroke 6. A. untreated hypertension 7. B. headache 8. B. dilate 9. D. 24 hours 10. A. should not be given anything b…
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the abundance of elements come from fusion reactions where atomic nucle…
1. \(H + He ightarrow Li\) 2. \(He + He ightarrow Be\) 3. \(Li + He ightarrow B\) 4. \(Ne + He ightarrow Mg\)
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when a pair of electrons is shared equally between two atoms, the bond …
A. non - polar covalent bond
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two groups test how temperature affects how quickly sugar dissolves. gr…
B. To increase confidence that the results are reliable
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8. what does the atomic number tell you about an element?
The number of protons in the nucleus of an atom of the element.
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when sodium reacts with chlorine... a sodium becomes a neutral atom. b …
D. Sodium donates an electron to chlorine and becomes a positively charged ion.
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what is the missing coefficient to make a balanced equation? 2kclo₃ → 2…
3
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what is the missing coefficient to make a balanced equation? 2kclo₃ → ?…
2
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7. what makes 1 atom different from another? __________
The number of protons in the nucleus.
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what is the missing coefficient to make a balanced equation? 2kclo₃ → ?…
2
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what is the missing coefficient to make a balanced equation? ?kclo₃ → k…
2
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q6. (s c.6.n.3.1) a scientist states that the law of conservation of ma…
Laws describe consistent patterns, and theories use evidence to explain why those patterns occur.
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how much fes would form if 5.6 grams of fe reacted with 3.2 grams of s?…
8.8 g
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how much cuo would form if 12.9 grams of cu reacts with 3.2 grams of o2…
$15.91\ g$
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hcl reacting with naoh is an exothermic reaction and the measured tempe…
More energy is released as bonds are formed than absorbed as bonds are broken.
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in a chemical reaction between hydrochloric acid (hcl) and sodium hydro…
exothermic
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9. what is the most accessible substance? (1 point) marijuana acid alco…
9. C. Alcohol 10. B. THC 11. D. All of the Above
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kcl dissolving is an endothermic reaction and the measured temperature …
More energy is absorbed by bonds broken than is released by bonds formed.
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in a chemical reaction between potassium chloride (kcl) and water, the …
endothermic
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what component of a chemical reaction is highlighted in red? 4fe(s) + 3…
plus
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what component of a chemical reaction is highlighted in red? 2h₂(g) + c…
coefficients
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what component of a chemical reaction is highlighted in red? 6co₂(g) + …
products
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column a 1. acid 2. adenosine triphosphate 3. base 4. chemical reaction…
1. h 2. a 3. i 4. f 5. j 6. d 7. g 8. c 9. b 10. e
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what does the rapid expansion and release of bubbles when hydrogen pero…
The reaction produces a gas.