Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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3 h₂o h: ________ o: ________ total: ________
H: 6 O: 3 Total: 9
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possible molecule shapes that could result from each of the hybrid orbi…
bent, tetrahedral
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na₂so₄ na: ____ s: ____ o: ____ total: ____
Na: 2 S: 1 O: 4 Total: 7
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identify the possible molecule shapes that could result from each of th…
bent, trigonal planar
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choose the molecular geometry of each type of hybrid orbital that forms…
When one s - and one p - orbital mix, the resulting hybrid orbitals have a linear geometry. When one s - and two p - orbitals mix, the resulting hybrid orbitals have a trigonal - …
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s below: pb3(po4)2 pb: p: o: total:
Pb: 3 P: 2 O: 8 Total: 13
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choose the name of the molecular geometry for each molecule described b…
1. linear 2. tetrahedral 3. bent 4. trigonal - bipyramidal
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choose the number of lone pairs or atoms to complete each description b…
A molecule that has a trigonal - planar shape has 0 lone pair(s). A molecule that has a bent shape and a trigonal - planar electron domain shape has 1 lone pair(s). A molecule tha…
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meaning of the prefix \sub-\, meaning of the root \atom\, meaning of th…
Meaning of the prefix "sub -": under; below Meaning of the root "atom": uncut, the smallest division Meaning of the suffix "-ic": having to do with; relating to Definition of "sub…
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pound based on their lewis structures. sf6 octahedral trigonal bipyrami…
octahedral
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determine the molecular shape of each compound based on their lewis str…
bent
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complete the following table for atoms or ions. atom or ion, number of …
Atom or Ion | Number of Protons | Number of Electrons | Electrons Lost/Gained --- | --- | --- | --- K⁺ | 19 p⁺ | 18 e⁻ | -1 e⁻ (lost) Mg²⁺ | 12 p⁺ | 10 e⁻ | -2 e⁻ (lost) O²⁻ | 8 p…
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determine the molecular shape of each compound based on their lewis str…
$Cl_2$: linear $PI_3$: trigonal pyramidal
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determine the molecular shape of each compound based on their lewis str…
C. tetrahedral
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predict the molecular geometry of each molecule. h - s - h bent linear …
bent
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use the lewis structure to predict the molecular geometry of each molec…
B. trigonal planar
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use the text to compare and contrast bases and acids. an acid is define…
Have a pH less than 7.0: Bases - □, Acids - ■ Taste sour: Bases - □, Acids - ■ Are usually solids: Bases - ■, Acids - □ Change litmus paper to red: Bases - □, Acids - ■
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boris combines zinc (zn) and a copper(ii) sulfate solution (cuso4) to p…
C. He will record 38 g, because according to the law of conservation of matter, matter can neither be created nor destroyed.
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the periodic table is organized into vertical groups of a. elements wit…
A. elements with similar properties
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on the periodic table, atomic mass a. increases up a group. b. decrease…
D. increases across a period from left to right
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how many elements are on the periodic table? a. 56 b. 93 c. 118 d. 154
C. 118
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javiers teacher gives him four cards, each displaying information about…
B. Yes, because the reactivity of elements decreases from left to right on the periodic table.
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before you read: take a second to break down todays topic by using your…
A macromolecule is a large molecule composed of many smaller units (monomers) linked together through chemical bonds.
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part 1: types of mixtures 1. define mixture: 2. circle the correct answ…
1. A combination of two or more substances that are not chemically combined. 2. Saltwater: homogeneous; Salad: heterogeneous 3. Air: homogeneous, components uniformly distributed;…
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a ball - and - stick model of a molecule. all matter is made of atoms. …
B. Ball - and - stick models help show the structure of matter.
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question 10 of 30 what is the balanced form of the chemical equation sh…
C. \( \mathrm{C}_{6}\mathrm{H}_{12}\mathrm{O}_{6}(s)+6\mathrm{O}_{2}(g)\to6\mathrm{H}_{2}\mathrm{O}(l) + 6\mathrm{CO}_{2}(g) \)
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vitamin d is only obtained from sunlight. true false question 9 (0.5 po…
Question 8: B. False Question 9: A. True Question 10: B. Aid in digestion
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question 5 (0.5 points) what is the key difference between vitamins and…
C. Vitamins are organic molecules, while minerals are inorganic molecules
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write the chemical symbol below for each atom. 6. 19 p, 21 n, 19 e 7. 1…
6. K 7. K⁺ 8. Br 9. Br⁻ 10. Br⁻
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multiple - choice question why did the carbon dioxide turn to a solid? …
it gave away enough energy to go through deposition (change of state from gas to a solid)
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lab safety quiz a beaker of a chemical is accidentally knocked off a la…
C. Immediately notify the teacher and allow the teacher to assist the student with the safety shower.
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name: q1 chemistry: u1l5 mixture separation teacher: date: uncommon sch…
1. Oil; because it is immiscible and has lower density; decantation. 2. Separate sand; filtration. 3. Evaporation. 4. Distillation or chromatography. 5. Condense water vapor from …
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protons, neutrons & electrons of atoms directions: use the periodic tab…
1. Protones (+1), neutrones (0), electrones (-1). 2. Protones y neutrones. 3. Número de protones, número atómico y número de electrones (en átomos neutros). 4. Sí, por ejemplo arg…
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which of the following is/are the most significant resonance structure(…
B. II
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which of the following is/are the most significant resonance structure(…
B. II
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question 8 of 32 which element has a lower first ionization energy than…
D. Sodium (Na)
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the change when a liquid takes in energy and turns to a gas is called e…
evaporation / vaporization
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which of the following is/are the most significant resonance structure(…
A. I
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if the liquid particles receive enough energy then they can escape, whi…
gas
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if the liquid particles receive enough energy then they can escape, whi…
None of the above options are correct as the liquid turns into a gas when particles receive enough energy.
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which of the following is/are the correct resonance structure(s) for bo…
D. only A and C
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are the electron movements shown legal? i ii a. yes yes b. yes no c. no…
B. yes, no
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question 7 of 32 which statement best describes the polarity of the mol…
D. It is polar, because the bond polarities add together in a bent molecule.
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are the electron movements shown legal? i ii a. yes yes b. yes no c. no…
B. yes, no
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question 6 of 32 which element has 2 valence electrons in the 2s sublev…
C. Be
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question 5 of 32 what is the formula for strontium oxide? a. sr₂o₂ b. s…
C. SrO
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question 4 of 32 what is the name of the compound with the formula lino…
C. Lithium nitrate
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question 3 of 32 what is the electron configuration for vanadium (v)? t…
B. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{3}$
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question 2 of 32 what is the formula for tin(iv) sulfide? a. sns b. sn4…
C. SnS₂
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question 1 of 32 which sublevel contains valence electrons in an atom o…
D. 3s
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question 23 of 25 who made the first periodic table of the elements? a.…
B. Dmitri Mendeleev
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question 22 of 25 hands moving on a battery - operated clock is an exam…
D. Chemical potential energy being converted to kinetic energy
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what is another name for group 8a? a. group 18a b. group 8 c. group 8b …
D. Group 18
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question 20 of 25 why do elements within a period of the periodic table…
A. They have different numbers of valence electrons.
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question 16 of 25 which family contains elements with a full octet of v…
B. The noble gases
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question 15 of 25 fireworks contain metals that are brightly colored wh…
B. Mg
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question 13 of 25 calcium (ca) has an atomic number of 20. it can form …
A. 2+
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question 12 of 25 how are the elements arranged in the current periodic…
C. In order of increasing atomic number
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7 ccc systems and system models liquid gallium changes to a gas at 2229…
In the model of gaseous gallium, the particles would be much farther apart and moving more freely in all directions compared to the particles in the model of liquid gallium, which…
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which of the following is the correct condensed structure for the follo…
B. $CH_3CHOH(CH_2)_2CHClCH_3$
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question 10 of 25 what are the noble gases? a. elements with seven vale…
D. Elements with two or eight valence electrons
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question 9 of 25 which option describes a phase change? a. plasma erupt…
D. Gasoline evaporating into the air
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question 8 of 25 which element contains the same number of valence elec…
D. Si
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what is the formal charge on the nitrogen in the following compound? as…
B. 0
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5 sep construct an explanation density is the mass of matter in a given…
Ice floats on water because the open hexagonal - lattice structure of ice molecules due to hydrogen - bonding makes ice less dense than liquid water.
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water forms drops because water molecules are attracted to one another.…
A. Water molecules are polar, meaning they have weak charges at each end. B. The attraction between water molecules forms surface tension. C. The positive end of one water molecul…
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question 6 of 25 which of the following is the energy of motion? a. kin…
A. Kinetic energy
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drag and drop words into the blanks to complete the prompt. the hydroge…
First blank: covalent Second blank: polar Third blank: hydrogen
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sep develop models use colored pencils to draw models for a chlorine mo…
Draw a model of a chlorine molecule ($Cl_2$) and a hydrogen - chloride molecule ($HCl$) using colored pencils with colors and relative sizes as per the atom key on the previous pa…
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sep develop models use colored pencils to draw models for a chlorine mo…
Use colored pencils to draw a chlorine molecule ($Cl_2$) and a hydrogen chloride molecule ($HCl$) according to the colors and relative sizes from the atom key on the previous page.
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which of the following is the correct representation of partial charges…
D. I = $\delta^-$; II = $\delta^-$; III = $\delta^+$
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question 4 of 25 which element is in the lanthanide family? a. silver (…
B. Promethium (Pm)
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question 3 of 25 what is the mass number of neon (ne)? a. 10 b. 20 c. 1…
B. 20
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question 2 of 25 which characteristic gives the most information about …
C. The atomic number
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question 1 of 25 an atom of aluminum (al) has an atomic number of 13 an…
B. 14
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spheres as models scientists often use spheres with different colors an…
Marbles are macroscopic and do not represent sub - atomic particles or chemical behavior of atoms.
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determine the formal charges for the indicated atoms, as drawn. i ii a.…
C. +1, 0
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what is the hybridization of the indicated atoms? a. i: sp², ii: sp² b.…
B. $sp^{2}$, $sp^{3}$
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what is the hybridization of the indicated atoms? i ii n≡ n nh oh o i i…
D. sp, $sp^{3}$
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choose the correct molecular formulas for the given bond - line formula…
B. $C_6H_{10}$, $C_{10}H_{15}N$
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violet has noticed that shes been feeling sick around one of the chemic…
Yes
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a beaker contains 15.23 ml of water. 6.7 ml of the water is measured an…
$8.5$ mL
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snc2p chemistry unit questions: true or false name: if the answer is tr…
1. False, Making an observation 2. True 3. False, Control group 4. True 6. D 7. E 8. G 9. A 10. B 11. H 12. C 13. F
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10: ____________ 11: ____________ 12: ____________ 13: ____________ 14:…
10. Crucible 11. Funnel 12. Graduated cylinder 13. Erlenmeyer flask 14. Filter paper cone 15. Scoopula
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zoe is a chemistry teacher earning a salary of $38,000 per year. she al…
a. I
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question which of the following could be considered a physical change? …
chopping firewood
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the diagram below shows the structure of an alloy composed of two unkno…
D. Ni and C
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question when a change in a physical property is observed, select the c…
it could be because of a chemical change or a physical change.
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question which of the following is not a likely indicator of a chemical…
the change in shape of a malleable metal
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question all of the following are chemical properties except: select th…
B. density
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in figure skating competitions, the fourth - place finishers are often …
A
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a large change in temperature (not resulting from external heating) wit…
a chemical change
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which of the following is not a physical change? select the correct ans…
fireworks are set off
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in the 19th century, the hulls of wooden ships were often lined with mu…
B. (Assuming B shows a random distribution of two types of atoms with a ratio that is approximately 60:40 for the two elements as described in the alloy composition)
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question when a pure substance undergoes a change from a solid state to…
physical change
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question all of the following are examples of chemical changes except: …
cracking an egg
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the diagrams below show the structures of two ionic solids, sro and the…
D. \(Ba^{2+}\)
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ion ionic radius ca⁺ 167 pm f⁻ 133 pm based on the data in the table, w…
D.
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question if something is a compound, it is also ________. select the co…
a pure substance
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5. complete the table below. use the example below and the simulation o…
# Explanation: ## Step1: Recall atomic - related formulas Number of neutrons = Mass number - Atomic number. For a neutral atom, number of electrons = number of protons. For an ion…