Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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c) solid to solid 3. what type of radiation is used in microwaves? a) i…
3. b) Non - ionizing radiation 4. b) Matter can only be transformed but not created or destroyed 5. c) It causes water molecules to vibrate and generate heat 6. c) They reflect cu…
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which of the following elements is a metalloid with moderate reactivity…
C. silicon (Si)
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classify the materials based on their composition. utensils wood alumin…
Utensils: substance Wood: heterogeneous mixture Aluminum foil: substance Glass: substance Milk: heterogeneous mixture Plastic: substance Water: substance Air: homogeneous mixture
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pure sodium metal (na) is very reactive. it is usually stored in oil to…
B. potassium (K)
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10. which of the elements is least likely to form a positive ion? 11. a…
10. Noble - gas elements 11. The atomic radius increases. 12. Atomic radius 13. Fluorine 14. Group 18 15. Li < Na < K 16. Rubidium (Rb) 17. Henry Moseley 18. Boron (B), silicon (S…
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1. this atom generally forms up to four bonds with other atoms. it has …
1. Hydrogen 2. Neon 3. Iron 4. Carbon - 14 5. Aluminum 6. Calcium 7. Helium 8. Fluorine
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why is hydrogen, a nonmetal, placed in the same group as alkali metals?…
b. Because it has just one valence electron like all the other elements in group 1.
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you read that petrochemicals are used in a wide range of products. what…
Advantages: Versatility in product creation (e.g., plastics in electronics), cost - effective. Disadvantages: Non - renewable resource reliance, environmental pollution (e.g., pla…
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which statement describes how alkali metals are found in nature? a they…
C. They are very reactive and are found in nature as compounds.
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5. write the chemical formula. as always, the number of atoms is writte…
1. $SbI_{5}$ 2. $PbO$ 3. $Sn_{3}P_{4}$ 4. $GeF_{4}$ 5. $Ga_{4}C_{3}$ 6. $CuBr$ 7. $PtSi$ 8. $CoCl_{2}$ 9. $ReH_{6}$ 10. $Ta_{2}Se_{5}$
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question 8 which passage from the article best supports the opinion tha…
D. One study showed that switching to plastic car materials in Europe saved 26 percent in fuel.
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question 6 which of these is most important to include in a summary of …
C. Petrochemicals help make up many products that we use every day.
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question 5 the article says all of the following except __________. a. …
D. Limiting the use of oil and natural gas in everyday life is simple to do.
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1) describe three reasons why pain is useful. 2) what does cipa stand f…
1. Warnings of injury, prevention of further harm, signals for rest/healing. 2. Congenital Insensitivity to Pain with Anhidrosis. 3. Inability to sweat. 4. Leads to pain - insensi…
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question 4 based on the article, the reader can predict that ________ a…
A. Some people will look for ways to use sustainable materials.
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how does the reactivity of the alkali metals change from top to bottom …
d. The reactivity increases.
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what is the definition of \sonnet\? a poem written in praise of ones lo…
a 14 - line poem that follows a particular rhyme scheme
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question 3 which two words are the closest antonyms? hint a. health and…
C. Element and compound
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question 2 according to the article, why did scientists begin to use pe…
C. The U.S. had a shortage of rubber, and scientists found they could create artificial rubber with petrochemicals.
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the primary difference between point source and nonpoint source polluti…
point source pollution sources can be readily identified while nonpoint source pollution sources are often unclear.
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5. simplify if possible. ionic compound formulas are always written in …
1. $Al_{2}Te_{3}$ 2. $Cd_{2}C$ 3. $ZnCl_{2}$ 4. $AgBr$ 5. $BaH_{2}$ 6. $CsF$ 7. $Na_{2}O$ 8. $Mg_{3}As_{2}$ 9. $Ag_{3}P$ 10. $CdI_{2}$
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question 1 which of these sentences states the main idea of the article…
B. Petrochemicals are found in many products that people use every day.
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periodic table review name: 1. as you move across a period from left to…
1. The number of protons in the nucleus increases. 2. Group 17 (halogens). 3. The reactivity increases. 4. Calcium (Ca). 5. Helium (He). 6. The ionization energy decreases. 7. Iro…
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periodic table high school reference sheet how many electrons does one …
A. 18
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read the excerpt below from \at the hearth\ by laura esquivel and answe…
A. Women work in the kitchen to prepare meals but are humble about their work.
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chemistry:earth sys a: term af- period 2 - rm c202 (lms) quiz: modeling…
4
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arrange the periodic families in order of metal reactivity. least ( ) (…
1. Least: Alkaline Earth Metals 2. Most: Alkali Metals
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as you go from left to right across the periodic table, the first ioniz…
B. increases
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the least active element in group 17 is
Iodine
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chemistry homework / matter, atoms, molecules, elements, and chemical b…
- Atom: a) The smallest unit of an element that maintains the properties of that element - Molecule: e) Two or more atoms joined together by chemical bonds - Element: d) A pure su…
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which element has the lowest electronegativity? o cesium o oxygen o flu…
cesium
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match the vocabulary word to its definition. smallest unit of a chemica…
1. d. atom 2. c. electron 3. a. neutron 4. b. nucleus
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which is a physical change? rusting iron burning paper folding paper ba…
Folding paper
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which of the following is a physical property that can be changed witho…
shape of a substance
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which action involving bread is a physical change? burning a piece of t…
Cutting a slice of bread
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place the following atoms in order of increasing reactivity top (lowest…
Argon, Silicon, Chlorine, Sodium
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which of the following is considered a physical change? rust forming on…
cutting wood into pieces to build a doghouse
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which of these is not a physical change? getting clothes wet burning a …
burning a candle
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how did henry moseley re - arrange the periodic table? by atomic number…
by atomic number
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why is ice melting considered to be a physical change? the water molecu…
the water molecules do not change chemically and are still H2O
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as you travel up a group, what happens to atomic size? it increases it …
it decreases
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which of these is a physical change? an object is cut into pieces rust …
an object is cut into pieces
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place the following atoms in order of increasing atomic radius (1 = sma…
N = 1, P = 2, Sb = 3, Bi = 4
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in which group are the most reactive nonmetals located? group 1 group 2…
Group 17
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use the following information to answer the next question. a standard c…
1457
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as you go from right to left across the periodic table, elements go fro…
As you go from right to left across the periodic table, elements go from Nonmetals to Metals.
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which of these is a physical change? something burns water freezes
water freezes
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which of these are physical changes? cutting, tearing, freezing, thawin…
cutting, tearing, freezing, thawing, folding, mixing without chemical changes
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use the following information to answer the next two questions. the lea…
B. anions, gains
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a diagram of the periodic table of the elements is shown below. periodi…
C. 3
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use the periodic table of elements to answer the following question(s).…
1. Metals are found on the left side of the periodic table. 2. They are nonmetals.
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according to the periodic table, the neutral atom of what element has 4…
A. beryllium
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what is the best tool for mixing liquids when heat is involved and you …
1. Erlenmeyer Flask 2. Meter
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which of the following tools is useful to measure large volumes of liqu…
1. C. Beaker 2. B. Meniscus
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5. during a laboratory experiment, you are given a clear, colorless liq…
mixture
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type the correct answer in each box. use numerals instead of words. a n…
The missing values in the table (from top - to - bottom, left - to - right) are: $60$, $35$. The probability that a soil sample contains organic matter given a positive result is …
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4. what is a physical blend of two or more substances with uniform comp…
B. homogeneous mixture C. solution
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use the following information to answer the next two questions. methano…
3422
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mixtures quiz cp chemistry a o / module 2: basics of matter 3. how is a…
A. A mixture can be separated by physical means.
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mixtures quiz cp chemistry a o / module 2: basics of matter 2. which of…
A. A solution of rubbing alcohol and water. B. A solution of salt and water. D. A solution of sugar and water.
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1. what is a physical blend of two or more substances that is not unifo…
heterogeneous mixture
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type the correct answer in each box. use numerals instead of words. a n…
0.9
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use the following information to answer the next two questions. the con…
B. $1.95\times10^{-1}$ mol/L
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use the following information to answer the next question. a student se…
C. stronger, loses
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9. the strongest oxidizing agent in the equations given above is a. ce³…
B. \(Ce^{4+}(aq)\)
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which of the following is a compound - complex sentence? the school day…
No correct option provided among the given ones.
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use the following information to answer the next question. four reactio…
5,6,7,8
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chemical reactions quick check which of the following molecules shows t…
$H_2SO_4$
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chemical reactions quick check what does the law of conservation of mas…
In a chemical reaction, mass is neither created nor destroyed.
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nitrogen monoxide gas, which is used to treat some pulmonary diseases, …
-3, +2, +1, +4
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chemical reactions quick check what are the reactants in a chemical for…
the atoms prior to the chemical reaction, found on the left side of the equation
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6. volcanoes on jupiters moons emit hydrogen sulfide gas and sulfur dio…
Reducing Agent: \(H_2S(g)\), Substance Being Oxidized: \(H_2S(g)\)
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a 1.0mol/l solution of ni(no3)2(aq) could be stored in a container made…
a. tin
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balancing chemical equations balance the equations below: 1) ___ n₂ + _…
1) $1N_2 + 3H_2 ightarrow 2NH_3$ 2) $2KClO_3 ightarrow 2KCl + 3O_2$ 3) $2NaCl+F_2 ightarrow 2NaF + Cl_2$ 4) $2H_2+O_2 ightarrow 2H_2O$ 5) $Pb(OH)_2 + 2HCl ightarrow 2H_2O+PbCl_2$ …
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chapter 2.2 contd molecular compounds non - metals can share electrons …
1. Metals and non - metals combine to form ionic compounds. 2. Non - metals combine with other non - metals to form molecular compounds.
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complete the paragraph using the dropdown menus. mass is the amount of …
Mass is the amount of matter in an object. Volume is the space a given amount of matter occupies. Volume can be written in units of Milliliters (mL) or cubic centimeters ($cm^{3}$…
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question 4 1 pts which of the following is not an example of physical w…
Question 4: A. oxidation Question 5: A. clay minerals
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use the following information to answer the next question. reduction ha…
a
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which of the following equations represents a spontaneous oxidation - r…
a. $2Ac^{3+}(aq)+3Tl(aq)\to3Tl^{3+}(aq)+2Ac(s)$
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question 2 1 pts which of the following sedimentary structures can be u…
Question 2: cross bedding Question 3: Spheroidal blocks of rock tend to weather quickly into other shapes.
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the reactants and products of photosynthesis are made of the same amoun…
$6CO_2+6H_2O ightarrow C_6H_{12}O_6+6O_2$ (Option 2)
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balancing act practice balance each equation. be sure to show your list…
1. $2Na + MgF_2 ightarrow 2NaF+Mg$ 2. $Mg + 2HCl ightarrow MgCl_2 + H_2$ 3. $Cl_2+2KI ightarrow 2KCl + I_2$ 4. $2NaCl ightarrow 2Na + Cl_2$ 5. $4Na + O_2 ightarrow 2Na_2O$ 6. $2Na…
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molecular compounds non - metal atoms can share electrons with other no…
# Explanation: ## Step1: Recall element - type rules Metals are on the left - hand side and middle of the periodic table, non - metals on the right. Ionic compounds form between m…
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use the following information to answer the next question. reduction an…
a. I, II, and VI
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5 question review: answer the following questions about oxygen; 1. a. g…
a. 16 b. 2 c. Chalcogen d. Non - metal e. Gas ### 2.
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chemistry i d. determine the molecular formula for each compound descri…
9. $N_2O_4$ 10. $C_8H_{12}O_4$ 11. $C_{14}H_{18}O_2$ 12. $C_{10}H_{14}N_2$ 13. $C_9H_{13}O_3N$
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reactivity is what type of property? physical chemical
Chemical
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a small chunk of matter is made only from gold atoms. this is an exampl…
A. Element
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chemistry 1 worksheet 7 - 3 percent composition & empirical formulas na…
1. Percent composition of \(Cr_2O_3\): \(Cr\approx68.42\%\), \(O\approx31.58\%\) 2. Percent composition of \(Ca_3(PO_4)_2\): \(Ca\approx38.76\%\), \(P\approx19.97\%\), \(O\approx4…
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what was the difficulty with bohrs model of the atom? a it was too comp…
B. It only explained the atomic emission spectrum of hydrogen.
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read the excerpts from lizzie bright and the buckminster boy. excerpt 1…
the only one for all the island's students
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15. some molecules that are covalently bonded do not have a difference …
Symmetric arrangement of electrons around the central atom.
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9. match the descriptions with the terms. this affects the solubility o…
1. Pressure 2. Solubility 3. Alloy 4. Dissolution 5. Concentration 6. Dilution/Concentration
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balancing chemical equations balancing chemical equations drill level 3…
$K_2O + H_2O = 2KOH$; $4Cr + 3O_2 = 2Cr_2O_3$; $Cu(NO_3)_2+2KOH = Cu(OH)_2+2KNO_3$; $BaCl_2+Na_2SO_4 = 2NaCl+BaSO_4$; $2SO_2+O_2 = 2SO_3$; $16Ni + 3S_8 = 8Ni_2S_3$; $Sc_2O_3+3H_2O…
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a solution with less than the maximum amount of solute is ____. dynamic…
D. unsaturated
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choose three characteristics of a solution. the particles are small eno…
The particles are small enough that they cannot be filtered. It is stable and does not settle out as a solid. It is uniform, with solute that is evenly distributed.
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what aids dissolution because it spreads out and disperses a solute mor…
stirring or agitation
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increasing the ____ of a solute makes it easier for dissolution to occu…
A. surface area
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a ____ is a mixture created when a liquid is used to dissolve a substan…
B. solution
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which of these is an example of a mixture? ○ cereal and milk ○ aluminum…
A. cereal and milk