Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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when a reaction releases more energy than it uses, it is called (1 poin…
C. exothermic
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match the vocabulary terms with their definitions. smallest unit of a c…
smallest unit of a chemical element - a. atom substance composed of one type of atom - d. element a group of solar systems, dust, and gas held together by gravity - b. galaxy
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biomass energy is energy from plants and other organic matter, such as …
Biomass Energy
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escriba los significados de cada palabra: 1. evaporacion. 2. destilacio…
1. Proceso por el cual un líquido se convierte en vapor. 2. Proceso de separación de mezclas basado en diferencias en puntos de ebullición. 3. Proceso de separación de sólidos de …
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wind energy is the mechanical energy of moving air. we harness this ene…
B. Mechanical energy
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escriba los significados de cada palabra: 1. evaporacion 2. destilacion…
1. Proceso por el cual un líquido se convierte en gas al absorber calor. 2. Proceso de separación de mezclas basado en diferencias de puntos de ebullición. 3. Proceso de separació…
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question 8 1.67 pts researchers have learned that mental disorders are …
D. nervous system
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acidic solutions will appear what color? yellow pinkish - red
Pinkish - red
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name: chemical bonds - ionic vs. covalent directions: using the table b…
| Compound | Element #1 (M or NM) | Element #2 (M or NM) | Bond Type | | ---- | ---- | ---- | ---- | | $H_2O$ | NM | NM | Covalent (Polar) | | $CH_4$ | NM | NM | Covalent (Non - P…
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part 3: scientific notation 1. write the following numbers in scientifi…
Accuracy is the closeness of a measurement to the true value, while precision is the consistency of repeated measurements. Yes, it is possible to be precise but not accurate (e.g.…
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periodic trends - review problems 1) put the elements in order from the…
1. a) Li, Ne, Ar; b) Mg, P, S; c) Ge, Sb, I 2. a) K, Cs, Fr; b) N, C, Ba; c) S, Te, Sn 3. a) Be, O, Ne; b) Sr, Ca, F; c) Xe, Ne, He 4. a) Fr; b) Si 5. a) Ba; b) I 6. a) Zr, Al, Zn…
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part 1: which element am i? write the element that is symbol - describe…
1. Hydrogen (H) 2. Chlorine (Cl) 3. Lead (Pb) 4. Sulfur (S) 5. Cobalt (Co) 6. Zirconium (Zr) 7. Hydrogen (H) 8. Iron (Fe) 9. Silver (Ag) 10. Bromine (Br) 11. Plutonium (Pu) 12. Co…
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question 10 of 10 2 (nh₄)₃po₄ ammonium phosphate how many total atoms a…
40
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for each of the chemical structures shown below, match the name of the …
Linear glucose chain - Amylose Branched structure - Amylopectin Two - ring structure - Sucrose Single five - carbon ring - Fructose
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demonstration 3: how do you balance an equation? what will the coeffici…
For $H_2O ightarrow H_2 + O_2$, the coefficients are 2, 2, 1. For $4CO ightarrow 2C + 2CO_2$, the simplified coefficients are 2, 1, 1.
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question 9 of 10 2 (nh₄)₃po₄ ammonium phosphate how many hydrogen atoms…
24
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demonstration 3: how do you balance an equation? what will the coeffici…
For $H_2O ightarrow H_2 + O_2$, the coefficients are 2, 2, 1. For $4CO ightarrow2C + 2CO_2$, the simplified coefficients are 2, 1, 1. Balanced equations show conservation of mass …
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question 8 of 10 4 cacl₂ calcium chloride how many total atoms are in 4…
12 Atoms
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question 7 of 10 4 co₂ carbon dioxide how many oxygen (o) atoms are in …
8 Oxygen Atoms
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question 6 of 10 4 co₂ carbon dioxide how many molecules are in 4 co₂? …
4
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which of the following correctly counts the atoms in ca₃(po₄)₂? 3ca, 2p…
3 Ca, 2 P, 8 O
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question 4 of 10 al₂(so₄)₃ how many total atoms are in al₂(so₄)₃? 12 3 …
17
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how many atoms are in the chemical formula co₂? 2 1 3 4
3
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question 1 of 10 co₂ how many elements are in the chemical formula co₂?…
2
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how many total atoms are in one formula unit of ammonium chloride (nh4c…
6 Atoms
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periodic table worksheet part 1: subatomic particles complete the follo…
| Particle | Charge | Mass | Location | |---|---|---|---| | Proton | + 1 | 1 amu | Nucleus | | Neutron | 0 | 1 amu | Nucleus | | Electron | - 1 | $\approx$ 0 amu | Outside nucleus…
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how many chlorine (cl) atoms are in one formula unit of ammonium chlori…
1 Chlorine Atom
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how many atoms total are in one molecule of glucose (c₆h₁₂o₆)? 12 atoms…
24 Atoms
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how many carbon (c) atoms are in one molecule of glucose (c₆h₁₂o₆)? 24 …
6 Carbon Atoms
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which elements are in glucose (c₆h₁₂o₆)? you can select more than one a…
A. Oxygen (O) C. Carbon (C) D. Hydrogen (H)
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if there are no chemical controls which can be implemented at your work…
Stop doing your job
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which elements are in ammonium chloride (nh₄cl)? you can select more th…
Hydrogen (H), Chlorine (Cl), Nitrogen (N)
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how many elements are in baking soda (nahco₃)? 5 3 4 6
4
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how many elements are in methane (ch₄)? 5 1 2 3
C. 2
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question 2 of 10 which chemical formula represents the compound shown? …
CaCO₃
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chemical formulas- part 1 atoms, elements, & compounds chemical formula…
$H_2O_2$
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matching: total = 23/25 date/block: organic chemistry a. the variable t…
- **Matching**: - Organic chemistry: D. Chemistry of carbon - containing compounds - Hypotheses: C. A proposed explanation for an observation - Analytical Chemistry: F. Chemistry …
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each element has a different number of protons. true false question 12 …
1. True 2. By atomic number
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what does the group number tell you about an element? how heavy it is h…
1. How many valence electrons it has 2. Metal
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what are the horizontal rows on the periodic table called? levels perio…
1. B. Periods 2. True
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multiple choice 1 point. put the following in order from smallest to bi…
F, Se, K
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multiple choice 1 point why are alkali metals (group 1) more reactive a…
The outer electron is further from the nucleus, making it easier to lose.
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as you go down a group shielding effect increases shielding effect decr…
Shielding effect increases
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multiple choice 1 point how many valence electrons does nitrogen have i…
5
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20 multiple choice 1 point which of the following elements would likely…
C. Sulfur (S)
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tuesday 9/23 which of the following is a physical change? a. iron rusti…
For the first question: C. Butter melting For the second question: b. Physical Weathering
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9 multiple choice 1 point atoms in groups 5, 6 and 7 will tend to: shar…
Gain electrons to satisfy the Octet Rule
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7 fill in the blank 1 point magnesium (mg) will choose your answer... e…
lose; 2; cation
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atmosphere review warm-up why does temperature increase in the stratosp…
Ozone absorbs ultraviolet radiation from the sun.
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fill in the blank 1 point. fluorine (f) will choose your answer... elec…
gain; negatively - charged
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to enhance the strength of the soil and give it cement - like propertie…
B. lime
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fill in the blank 1 point potassium (k) will choose your answer... elec…
lose; positive 1 - charged
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circle the letter next to the best answer. 1. gunpowder was likely firs…
A. China
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q.5. balance the following chemical equations. a) __alcl₃ + __h₂o → __a…
a) $1AlCl_3 + 3H_2O ightarrow1Al(OH)_3+3HCl$ b) $1C_3H_8 + 5O_2 ightarrow3CO_2 + 4H_2O$ c) $2Al+3FeO ightarrow1Al_2O_3 + 3Fe$ d) $1S_8+12O_2 ightarrow8SO_3$ e) $2C_7H_6O_2+15O_2 i…
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10) refer to figure 4.5 (above) - which of the structure(s) contain a c…
11) B. a polar covalent bond 12) D. 2 13) A. sulfhydryl 14) D. its outer (valence) electron configuration 15) D. ionic bond 16) D. $10^{-4}$ 17) E. pH 2
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cautiously peering into the cave i saw glistening spikes, so i stood in…
1. It follows a basic rhyme scheme and uses a simile to describe the stalactites.
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61. a shiny, gold - colored bar of metal weighing 57.3 g has a volume o…
The metal bar is not gold.
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18. which configuration belongs to a. 1s²2s²2p¹ b. 1s²2s²2p⁶3s²3p⁶4s²3d…
19. b. [Ne]3s²3p³ 20. b 21. b. Neon (Ne)
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79. what is the correct symbol for each element? a. sodium d. copper b.…
a. Na b. Al c. Cl d. Cu e. S f. Sr
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chem ws 1a name sig figs determine the number of significant figures in…
1. 3 2. 1 3. 5 4. 5. 1 6. 7. 3 8. 5 9. 10. 4 11. 5 12. 2 13. 14. 4 15. 5 16. 4 17. 1 18. 4 19. 0 20. 0
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organic whole wheat flour sells in bags weighing 2.915 kilograms. a. ho…
a. 2.9 b. 3 Extension: 0.1
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label the following elements as metal, non - metal, or metalloid
C: Non - metal B: Metalloid Na: Metal Cl: Non - metal Ge: Metalloid Au: Metal K: Metal O: Non - metal
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question 1 (3 points) (02.02 lc) how does breathing change during exerc…
Question 1: B. Rate and depth increase Question 2: A. muscle movement Question 3: A. Blood vessels are dilated to increase the amount of oxygen carried in the blood, and the lungs…
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identify the following as a chemical property(cp) or physical property …
1. PP 2. PP 3. CP 4. PP 5. CP 6. CP 7. CP 8. PP 9. CP 10. PP 11. PP 12. PP 13. PP 14. CP 1. PC 2. CC 3. PC 4. PC 5. CC 6. CC 7. PC 8. PC 9. CC 10. PC 11. CC 12. CC 13. CC 14. PC 1…
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how are compounds formed? chemical change condensation evaporation perc…
chemical change
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what do we call a substance in which two or more elements are chemicall…
B. compound
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to prevent food allergens from being transferred to food, buy food from…
clean and sanitize utensils before use.
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when two elements bond and form a compound, what happens to their proto…
The protons remain the same in the nucleus of each atom.
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this image shows a model of an ammonia molecule. ammonia has one nitrog…
yes
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how was gunpowder discovered? a. daoist alchemists worked tirelessly to…
D. Daoist alchemists accidentally creating huo yan, or "fire drug," instead of a cure for death.
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sodium is a metal and chlorine is a gas. is sodium chloride (table salt…
no, it has completely different properties
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sodium is an element. chlorine is an element. when sodium and chlorine …
a compound
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sodium is a metal. chlorine is a gas. their chemical symbols are shown …
yes
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fill - in - the - blank questions 1. a vertical column of elements in t…
1. Group 2. Period 3. Alkali metals 4. Alkaline - earth metals 5. Transition metals 6. Semiconductors 7. Metalloids 8. Halogens 9. Noble gases 10. Lanthanides (top row), Actinides…
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which is not a characteristic of the zones of a deciduous forest? a. he…
D. ground zone - decomposing leaves and organic matter
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chemical engineer carol lin has developed a technique for recycling clo…
B. popularity
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in what section of an msds would you find the recommended fire extingui…
Section 5
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what section of an msds provides the phone number(s) for contacting the…
Section 1
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which si unit of length is most commonly used to indicate the radius of…
B. 1 picometer (pm)
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which si unit of length is most commonly used to indicate the radius of…
B. 1 picometer (pm)
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which of the following statements is true about the atoms of any elemen…
C. All the atoms of a given element are identical in that they have the same number of protons.
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which statement is true about all the atoms of a given element? a they …
C. They all have the same number of protons.
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select all that apply a all atoms are about the same size. b neutral at…
B. Neutral atoms are made of specific numbers of protons and electrons but the number of neutrons they possess can vary a little bit. D. The number of protons determines what type…
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subatomic particles that do not possess any charge but provide mass to …
Neutrons
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what is contained in the nucleus of an atom? select all that apply a pr…
A. protons, B. neutrons
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what is all matter made of? a atoms b protons c electrons d neutrons
A. atoms
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question 1 atoms are ______ in charge. a positive b negative c neutral …
- Question 1: C. Neutral - Question 2: E. a and b are correct
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1. human activity produces pollutants, including chemicals and sewage, …
First blank: prevent; Second blank: aid in; Third blank: industrial and farm landscapes
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why did the federal government create this program in 1933? - to establ…
1. to provide jobs and improve regional standard of living 2. Huey Long's proposal to "share our wealth"
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polyphenols are organic compounds ______ among their many roles, provid…
C. that,
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you measure the products of a chemical reaction to be 0.56 g, 0.59 g, a…
1. precise but not accurate 2. both accurate and precise 3. neither accurate nor precise
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1. name each of the following ionic compounds: (a) mgbr₂ (b) khso₄ (c) …
### 1. Naming ionic compounds - **(a) \(MgBr_2\)** - **Explanation**: Magnesium (\(Mg\)) is a metal with a \(+ 2\) charge and bromine (\(Br\)) is a non - metal. The name is magnes…
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assessment question 5 who should you contact if you see an unauthorized…
Salaried Member of Management
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chemistry (5th ed.) take the chapter 3 practice test. | 14 questions qu…
False
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4. which of the following quantities has the greatest number of signifi…
0.75320 g
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question 28 (1 point) listen which of the following is the branch of ch…
2) The branch of chemistry that deals with carbon - containing compounds
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question 27 (1 point) listen o²⁻ ion has __________ number of electrons…
1) 10 electrons, 8 neutrons
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question 26 (1 point) daltons atomic theory, did not propose which of t…
1) II and IV
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question 25 (1 point) listen mn and si are _____________and ___________…
3) Transition metal and semimetal
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question 24 (1 point) cs and ba are __________ and __________, respecti…
2) Alkali metal and alkaline earth metal