Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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3. starting with 50 ml of a 0.5 m solution, perform a 1:5 dilution. wha…
3. \(0.1\space M\) 4. \(0.1\space M\)
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stars are surrounded by a white circle of gaseous material called the c…
\(3.4\times 10^{6}K\)
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that range across a mans imaginings when a sure music fills him and he …
Both use everyday language.
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give all the possible values of the four quantum numbers of an electron…
\(n = 3\), \(l = 0\), \(m_l=0\), \(m_s=\frac{+1}{2}\) or \(\frac{-1}{2}\)
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vsepr in action what happened when you clicked on one of the bonded ato…
The bonded atoms tended to stay as far apart from each other as possible. ; The angles between bonded atoms were maximized.
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to get a sense of vsepr, select the two most likely positions where oxy…
Position 1, Position 3
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drag the electrons and bonds to the correct place in arrangement of ato…
The Lewis structure is \(H-\dot{N}=\dot{N}-H\) (where the dots represent the lone pairs on each N atom)
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write the lewis structure for the following molecule: hcn.which one of …
\(H - C\equiv N:\)
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now its your turn. write the lewis structure for the following molecule…
\(:\ddot{Br}-\ddot{Br}:\) (the first option in the given choices)
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remember the difference between ionic and covalent bonds? this differen…
- Electrons are shared in covalent bonds. - Electrons do not move independently in ionic bonds. - Electrons do not move independently in covalent bonds.
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this will be graded, so make sure you understand all the concepts befor…
7
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which best describes the structure of the poem \safari day in kenya\? f…
free verse with varied line lengths
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this will be graded, so make sure you understand all the concepts befor…
1
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lets practice a few examples of getting the number of valence electrons…
2
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lets practice a few examples of getting the number of valence electrons…
6
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in summary, there are a couple of different ways to determine the numbe…
- Second option: Use the electron configuration. Add up the total number of electrons in the highest principal energy level/valence shell. - Third option: Use the group number. Th…
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given the electron configurations shown, drag the lewis structures to s…
Lewis symbols: \(Li\cdot\), \(\cdot Be\cdot\), \(:\dot{N}\cdot\), \(:\ddot{F}\cdot\), \(:\ddot{Ne}:\)
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lewis symbols part 1 using the electron configuration, determine the nu…
The number of valence electrons for the electron configurations \(1s^{2}2s^{1}\), \(1s^{2}2s^{2}\), \(1s^{2}2s^{2}2p^{1}\), \(1s^{2}2s^{2}2p^{2}\), \(1s^{2}2s^{2}2p^{3}\), \(1s^{2…
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you learned previously about the electron configuration of atoms. the e…
- B. The arrangement of valence electrons in a molecule helps determine its structure. - D. Lewis structures lead us to molecular structure, and molecular structure leads us to mo…
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lets revisit your answer to the question from before. what do you think…
0.21, 0.211, 0.21153
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read the poem. skimming the bottom in the company of toes, i observe th…
abcb
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review i 1 your ideas you and a friend need to find the density of a me…
Your response of \(2.67\) (assuming proper rounding to three significant figures) is better. Because in a density calculation \(d = \frac{m}{V}\), the number of significant figure…
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question 10 (mandatory) (10 points) listen the most serious complicatio…
Pulmonary embolism
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the kinetic theory model states that particles of matter are always in …
Solid
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physical properties are characteristics that can be observed without ch…
The spherical shape of the orb
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a substance is placed in a closed vessel. the substance is continuously…
2, 4
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some chemical reactants are listed in the table below. complete the tab…
| species | oxidation state of highlighted atom | | ---- | ---- | | \(CO_2(g)\) | \(+4\) | | \(NH_3(g)\) | \(-3\) | | \(H_2O(l)\) | \(-2\) | | \(CO(g)\) | \(+2\) |
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classify each chemical compound listed in the table below. compound typ…
| compound | ionic | molecular | acid | base | |--|--|--|--|--| | \(HNO_3\) | | \(\square\) | \(\square\) | | | \(Ba(OH)_2\) | \(\square\) | | | \(\square\) | | \(NaNO_3\) | \(\sq…
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decide whether each chemical reaction in the table below is an oxidatio…
For \(CO(g)+H_2O(g)\to CO_2(g)+H_2(g)\): redox reaction? yes; reducing agent: \(CO\); oxidizing agent: \(H_2O\) For \(CaO(s)+CO_2(g)\to CaCO_3(s)\): redox reaction? no For \(FeO(s…
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the different colored squares on the periodic table show elements that …
Silicon (Si)
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which set correctly orders the atoms from lowest to highest ionization …
\(Rb < Na < Si < S\) (the first option)
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question 13 (6 points) question 13) think about how two fatty acid mole…
- Between non - polar regions: London dispersion forces. - Between polar regions: Hydrogen bonding (if applicable) or dipole - dipole interactions.
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2. the court jester reappears, alone, and takes center stage in the aba…
b. epilogue
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a. directions: match each word with its definition by writing the lette…
A. 1. b 2. c 3. a B. 1. a 2. b
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questions 1. write the balanced chemical equation for the reaction of k…
$$KHC_8H_4O_4+NaOH = KNaC_8H_4O_4 + H_2O$$ ### Question 2
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question 3 0 / 1 point what type of organic reaction is the following: …
Substitution
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question 3 (1 point) what type of organic reaction is the following: ch…
C. substitution # Question 4
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question 1 (1 point) what type of organic reaction is the following: bu…
Question 1: addition (hydrohalogenation) Question 2: substitution
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which pair of elements has the most similar properties? n and p li and …
N and P
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which of the following is true regarding cholesterol? cholesterol is ch…
All of these are correct.
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question 28 2 pts phospholipids can serve as emulsifiers. emulsifiers k…
True
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the chemical formula for methane is and a model of its structure is sho…
molecule
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select the correct answer cerise is a schoolteacher. she is teaching he…
D. bioaccumulation
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which of the following is true about organics? organics have higher nut…
GMO's are not allowed in organics.
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which statement best describes the change to an ice cube as it melts? t…
The change is physical because the substance remains the same.
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mixing baking soda and vinegar makes the temperature of the solution de…
A. New ELEMENTS were formed.
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question 33 2 pts it is permissible for non - organic farms to do which…
All of the above are correct.
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what is the smallest unit of an element that still retains the elements…
an atom
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which element has 7 valence electrons? hydrogen flourine lead
Fluorine
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how does the zig - zag line on the periodic table help indicate propert…
The third statement (Elements located on the LEFT of the metalloid line are good conductors of heat and electricity) is correct.
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which type of matter can be separated by physical means? element mixtur…
mixture
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which of the following is an example of a compound? carbon iron copper …
water
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which conclusion can be made about calcium and magnesium in the same gr…
They are both reactive metals.
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where are the most reactive metals located on the periodic table? the r…
the column at the far left side of the table
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what is the best description of what has happened to flowers when they …
a chemical reaction
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which element in period 3, group 1 is known to be a highly reactive met…
sodium (Na)
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what is the best evidence that a gas has been produced in a chemical re…
formation of bubbles
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which statement best describes how elements are grouped on the periodic…
Elements within a group have similar properties.
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part 4 - concept check & reflection (10 - 15 min) answer in complete se…
1. The number of protons in the nucleus determines the identity of an atom. 2. The charge of an ion is determined by the difference between the number of protons and electrons. 3.…
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question 1 - 15 a study shows that hospital admissions for asthma, a br…
\((60,19.5)\)
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question 2 vitamins are metabolized to yield energy. occur in gram amou…
are organic molecules.
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4. which statement correctly describes photons? photons behave like par…
Photons are particles of light and have a wavelength.
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the nature of light quiz cp chemistry a o / module 4: electronic struct…
As the wavelength increases, the frequency decreases.
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multiple - choice question the number of protons is called the______num…
C. atomic
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problem 3 the graph shows the cost vs. weight relationship for two typ …
The 2 5 statements are true
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perspective drawing techniques are essential for which of the following…
b. Architects
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read the text. from the 1500s to the early 1800s, sugar was shipped fro…
- Sugar was expensive in Europe - Beet - sugar factories opened. - Little sugar was available in America in its early days - A treaty with Hawaii was established. - Little sugar w…
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do enzymes speed up or slow down chemical reactions? * speed up slow do…
Speed up
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support structures use the information below to answer the question. ne…
automatically add support
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soils that are rich in clay and organic matter typically have a low cat…
B. False
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support structures use the information below to answer the question. ne…
a chemical process using water
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support structures use the information below to answer the question. ne…
Fused Filament Fabrication (FFF) and Material Jetting (MJ)
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support structures use the information below to answer the question. ne…
Support can be manually added to any spot that needs more.
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a bacchanalian verse\ by robert herrick full me a mighty bowl up to the…
A-B-B-A
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explain how water molecules are attracted to each other (min of two sen…
Water molecules are polar. Opposite - charged ends (hydrogen - oxygen) attract via hydrogen bonds.
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poetry: rhyme scheme \a night scene\ by cheesquatalawny (john keila rid…
ABAB
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question 3 (mandatory) (2 points) carbon can bond with up to__________ …
4
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what happens when cabr₂ is dissolved in water at the particle level? th…
The \(CaBr_2\) particles separate into ions.
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what creates radio waves and light waves? friction created by the accel…
Magnetic and electric waves travel perpendicular to each other in radiation.
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1. while working, a construction worker is bothered by a hurt muscle. h…
exothermic
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current attempt in progress verdell has been studying for a test in his…
retrieval
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1. while working, a construction worker is bothered by a hurt muscle. h…
exothermic
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which compound, hcl or hf, is likely to have stronger intermolecular fo…
HF
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question 1 according to the law of conservation of mass, in any chemica…
the mass of reactants is equal to the mass of products
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what results from an uneven distribution of charges in a molecule? neut…
Polarity
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which statement best explains why oil and water do not mix? water molec…
Water molecules are polar and oil molecules are nonpolar.
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an object in motion, such as an automobile, has ______ energy.chemicalp…
kinetic
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forces cause objects to move or change direction. thermal unbalanced ba…
Unbalanced
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what is the definition of radiation? the transmission of energy in the …
The transmission of energy in the form of waves or particles
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34. the weighted average mass of the isotopes of that element a. atomic…
34. a. Atomic mass 35. a. Pauli exclusion Principle 36. c. quantum 37. c. 'p' orbital (assuming the first figure is a 'p' orbital shape) 38. a. Principle quantum number 39. c. ele…
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view this video the temporal lobes are key to ______ memory (facts and …
- First question: explicit/declarative - Second question: All these options are correct.
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14. according to the law of conservation, how many grams are in the pro…
\(40\) g
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unit exam: literature - figurative language which of the following is a…
Professor Anderson is such a Scrooge.
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13. according to the law of conservation, how many grams are in the rea…
\(24\space g\)
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12. according to the law of conservation of matter, complete the missin…
\(80\)
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11. which equation represents the law of conservation of matter? a. h₂ …
d. \(FeS + 2HCl ightarrow FeCl_2+ H_2S\)
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10. due to the law of conservation of matter, how many grams of carbon …
A. \(25\)g
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9. what number should precede (be in front) h₂ in the chemical equation…
\(2\)
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12. elements can be broken down into simpler substances by chemical mea…
12. False 13. True 14. False 15. True
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name: date: part 1: multiple choice (1 - 10) 1. what is the smallest un…
1. B. Atom 2. B. \(H_2O\) 3. B. Two or more atoms bonded together 4. C. Iron 5. B. Compound 6. B. \(H_2\) 7. B. 2 atoms of hydrogen and 1 of oxygen 8. C. Chemical bonds 9. A. \(O_…