Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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however, the science that explains why some people love roller - coaste…
It explains why some people might not enjoy roller coasters.
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question 8 of 10 which of the following is the correct name for mgbr₂? …
D. Magnesium bromide
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read the text. air pressure is the pressure in a given area caused by t…
Altitude is lower, such as at sea level. - Air pressure is higher. Altitude is higher, such as at the top of Mount Everest. - Air pressure is lower.
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review the third paragraph. activities. in addition to the sense of fre…
Riding a roller coaster can give you a positive type of stress.
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question 7 of 10 which of the following is the correct formula for nitr…
A. $NF_3$
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question 6 alicia, who is a cancer patient, prefers to have her head sh…
Question 6: Personal choice Question 7: Check the client's care plan and employer's policy regarding shaving clients.
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question 6 of 10 what is the oxidation state of cobalt(iii)? a. +3 b. +…
A. +3
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the concentration in h+ of a solution can be measured using the _______…
pH
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question 5 of 10 which of the following is the correct name for ccl₄? a…
A. Carbon tetrachloride
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question 4 of 10 how are prefixes used to name compounds? a. prefixes a…
A. Prefixes are used to tell how many of each kind of atom are in covalent compounds.
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question 2 of 10 what is the oxidation number of an element? a. the gro…
B. The charge an element would have if it lost or gained electrons
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question 1 of 10 how are oxidation states of transition metals indicate…
D. Roman numerals are used to indicate oxidation states.
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question 10 of 10 what does the vsepr theory describe? a. how atomic ra…
C. Why molecules have different shapes
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question 9 of 10 nf₃ has three f atoms bonded to a central n atom, with…
B. Trigonal pyramidal
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which reference is most appropriate for handling specific chemical agen…
1. B. Safety Data Sheet (SDS) 2. B. Pharmacy Security Manual
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question 8 of 10 how does the shape of a molecule affect the polarity o…
C. A molecule that has a symmetrical shape will be a nonpolar molecule.
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question 7 of 10 what type of bonding around a central atom would resul…
C. Three groups bound to it with no lone pairs
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match each bond type with the correct description. 1 covalent 2 hydroge…
1. Electrons are shared - Covalent 2. Electrons are transferred - Ionic 3. A weak bond that occurs between atoms in polar molecules - Hydrogen
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question 6 of 10 why are a molecules atoms as far away from each other …
C. Forces between electron pairs push the atoms apart.
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question 5 of 10 what shape would a molecule with two bound groups and …
B. Bent
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question 3 of 10 which of the following shapes would represent a molecu…
D. Linear
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question 2 of 10 how does a lone pair contribute to molecular shape? a.…
B. It takes up space like an "invisible" atom.
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dr. paivio studies the ways in which the endocrine system and the nervo…
Both systems secrete molecules that activate receptors elsewhere.
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question 1 of 10 in the following ions, the first atom listed is the ce…
B. $PO_{4}^{3 - }$
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16. when burning 180 g of glucose in the presence of 192 g of oxygen, w…
264 g
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14. is a change in state a physical change or a chemical change? (0.5 p…
A. Physical change
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ag(no3)2 ag: ____ n: ____ o: ____
Ag: 1 N: 2 O: 6
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11. classify the following as either a chemical property or physical pr…
11. B. Physical Property 12. A. Intensive 13. A. Chemical change
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consider the lewis dot structures below, which represent the valence el…
C. tetrahedral
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h2o h: ____________ o: ____________
H: 2 O: 1
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na₂co₃ na: ________ c: ________ o: ________
Na: 2 C: 1 O: 3
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a lewis electron structure of a molecule is shown. judging by the elect…
$sp^{3}$
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are chemical messengers mostly manufactured by the endocrine glands, an…
Hormones
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pb(no3)2 pb: ________ n: ________ o: ________ total: ________
Pb: 1 N: 2 O: 6 Total: 9
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prelaboratory assignment 1. provide the key term that corresponds to ea…
(a) Chemistry (b) Science (c) Scientific method (d) Experiment (e) Hypothesis (f) Theory
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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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reactivity quick check which elements would react most easily with each…
an element with a high electronegativity and an element with a single valence electron
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the arcade looked nothing like how cory had imagined. it did not match …
D. schema
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one word in the sentence is misspelled. click on it, and then spell it …
The misspelled word is "liesure", and the correct spelling is "leisure".
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lt 1: science safety approved eye protection devices (such as goggles) …
Any time chemicals, heat, or glassware are used
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1. what affects the atomic radius of an atom? (0:45) 2. why does the at…
1. The number of electron shells and effective nuclear charge. 2. The number of electron shells increases, making the atom larger. 3. The additional proton in beryllium attracts e…
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2. chlorine (cl) has two isotopes. cl - 37 has an abundance of 23.9% wi…
$35.446183$ g
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name: ______________ date: ______________ per: ______________ 4. which …
The subatomic particle is the neutron. Neutrons contribute to the mass of the atom. Since the number of neutrons in Cu - 63 and Cu - 65 is different (34 and 36 respectively), whil…
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observe the photograph and answer the questions in the box below. 1. wh…
She is wearing gloves. Wearing gloves is important in a laboratory setting to protect hands from chemicals and maintain safety.
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air pressure is the pressure in a given area caused by the weight of th…
- Air pressure is highest: Altitude is lower, such as at sea - level. - Air pressure is lowest: Altitude is highest, such as at the top of Mount Everest.
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across 3. how much matter is in an object 6. how heavy an object is for…
Across: 3. Mass 6. Density 9. Temperature 10. Matter 11. Repel 14. Boil Down: 1. Gas 2. Volume 3. Magnetism 4. Liquid 5. Buoyant 7. Freeze 8. Attract 10. Melt 12. Poles 13. Solid
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13. fill in the following chart for each element or isotope element nam…
| Element Name | Symbol | Isotope Symbol | Atomic # | Mass # | # of Protons | # of Neutrons | # of Electrons | | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | | Hydrogen…
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types of matter part 1 directions - use the terms from your \compositio…
1. Heterogeneous mixture 2. Compound 3. Element 4. Homogeneous mixture (solution) 5. Heterogeneous mixture 6. Heterogeneous mixture 7. Heterogeneous mixture 8. Homogeneous mixture
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module 5 neurons: the basic elements of behavior learning outcomes lo 5…
LO 5 - 1: To understand behavior as the brain and nervous system underlie mental processes and actions. LO 5 - 2: Neurons, synapses, etc. LO 5 - 3: Through electrical impulses (ac…
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2 properties of water lesson objectives discuss the unique properties o…
Acid: A substance that donates hydrogen ions (H⁺) in solution. Adhesion: The attraction between different substances. Base: A substance that accepts hydrogen ions (H⁺) or donates …
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practice #6 1. how does the enrollment in physical science compare with…
1. Physical science enrollment generally increased and chemistry enrollment fluctuated. 2. To identify which line represents which data - set. 3. 1984 and 1985.
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practice #5 1. does the price of apples always increase with the demand…
1. No 2. 20 3. $2 ### Practice #6 (Students Enrolled in Physical Science and Chemistry at North High School vs. Years)
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rank the following from most acidic to least acidic. to rank items as e…
$[H_3O^+]=10^{-2}$, pH = 3, pH = 5, $[H_3O^+]=10^{-6}$, pH = 14
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fe³⁺ enter your answers numerically separated by a comma. np, ne = prot…
26,23 38,36
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v3+ enter your answers numerically separated by a comma. np, ne = proto…
23,20 15,18
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how to count atoms worksheet 1. the symbol of an element represents one…
$Br$: 1 $Cl_2$: 2 $Ca_3(PO_4)_2$: $Ca$: 3 $P$: 2 $O$: 8
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ca²⁺ express your answers as integers. enter your answers separated by …
20,18
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chemical properties of water what conditions should allow seawater to h…
D. cold and fresh
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chemical properties of water what is the most commonly occurring compon…
A. chlorine
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the diagram shows the general structure of a lipid, which consists of t…
carboxyl group
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lipids exhibit different characteristics based on their structures. the…
B. $C = C$
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which describes the basic structure of a fatty acid? a long carbon and …
a long carbon and hydrogen chain and a carboxyl group
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co²⁺ express your answers as integers. enter your answers separated by …
27,25 17,18
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96 42mo enter your answers numerically separated by a comma. view avail…
42,54 15,16
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40 20 ca enter your answers numerically separated by a comma. > view av…
20,20 88,140
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chemical properties of water what has a greater density? ○ cold freshwa…
cold saltwater
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4. a student was performing a reaction of neutralization of baking soda…
a) $2.95$ b) $1.05$ c) $25.0+15 + 12+1 = 53.0$ d) $\frac{2.95}{84.007}\approx0.0351$ e) $0.0351$ f) $0.0351\times60.052\approx2.11$ g) $53.0\times1.05 = 55.65$ h) $\frac{2.11}{55.…
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process of incorporating new objects or situations into existing schema…
C. assimilation
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5. which of the following forms of potential energy do you think this c…
D. gravitational potential energy
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14. ni 15. p 16. cr 17. mn 18. cu 19. zn
18. Cobre 19. Zinc
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kinetic energy whenever an object is moving, it has the ability to do w…
The flexed bow has potential energy. The energy in the bow is due to its condition. When the string is released, work will be done on the arrow.
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extension: using the deciphering tool below and your periodic table, fi…
THE BEST CHEMISTRY CLASS EVER
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3. to neutralize 0.035 moles of baking soda, one needs ______ mole(s) o…
0.035
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extension using the deciphering tool below and your periodic table, fin…
THE EXPERIMENT IS TOO BIG TO FAIL
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try to spell your first and last name using the chemical symbols. for e…
No specific answer as no name is provided to spell using chemical symbols.
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to neutralize 0.035 moles of baking soda, one needs ____________ mole(s…
0.035
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is an effort or strategy to achieve a goal or a solution to a problem t…
A. Problem solving
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practice it tendency to focus on only one aspect of a situation at a ti…
D. centration