Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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heat transfer in earths systems understanding heat movement the sun pow…
1. Radiation 2. Conduction
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which item is not used by lady macbeth as a symbol in lines 58-67? sele…
1. b. flower 2. b. She wants to be in charge of tonight's major scheme.
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Question was provided via image upload.
11) $2\text{Li} + 2\text{H}_2\text{O} ightarrow 2\text{LiOH} + \text{H}_2$ 12) $2\text{HgO} ightarrow 2\text{Hg} + \text{O}_2$ 13) $3\text{Ca(NO}_2\text{)}_2 + 2\text{H}_3\text{PO…
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5. biomass energy is derived from what? nuclear waste byproducts. organ…
Organic materials like plants.
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name:period:date:chemistry testbalancing & types of chemical reaction**…
1. SR (Single Replacement) 2. D (Decomposition) 3. C (Combustion) 4. S (Synthesis) 5. DR (Double Replacement) 6. D (Decomposition) 7. C (Combustion) 8. SR (Single Replacement) 9. …
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directions: create a bohr model of an atom by dragging each subatomic p…
- Nucleus (inner blue circle): 13 protons, 14 neutrons - Innermost orbit: 2 electrons - Middle orbit: 8 electrons - Outermost orbit: 3 electrons
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what does the temperature of a substance directly measure? the chemical…
The average kinetic energy of its particles
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6. how many hydrogen atoms are present in one formula unit of ammonium …
6. b. 8 7. a. 1:1. 8. d. 54.94 g/mol. 9. b. 41.99 g/mol. 10. d. 342.17 g/mol.
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1. the atomic number of neon is 10. what is the average atomic mass of …
1. c. 20.180 amu 2. a. 27.94 amu 3. c. 10.812 amu 4. d. hydrogen has more than 1 isotope. 5. c. 6 mol H
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bohr model quiz draw the bohr model for the following elements. 1. mg⁺²…
1. $\text{Mg}^{2+}$ Bohr Model: - Nucleus: Labeled $\text{Mg}^{2+}$ (contains 12 protons, 12 neutrons) - Energy Level 1: 2 electrons - Energy Level 2: 8 electrons 2. $\text{Cl}$ B…
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name:the road not takenby robert frosttwo roads diverged in a yellow wo…
1. A-B-A-B 2. "In leaves no step had trodden black." 3. First-person point of view 4. "Because it was grassy and wanted wear;" 5. "Because it was grassy and wanted wear;" 6. Refle…
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bohr model quiz draw the bohr model for the following elements. 1. mg⁺²…
1. $\text{Mg}^{2+}$ Bohr Model: - Nucleus: Labeled $\text{Mg}^{2+}$ (contains 12 protons, 12 neutrons) - Energy Level 1: 2 electrons - Energy Level 2: 8 electrons 2. $\text{Cl}$ B…
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name:the road not takenby robert frosttwo roads diverged in a yellow wo…
1. A-B-A-B 2. "In leaves no step had trodden black." 3. First-person point of view 4. "Because it was grassy and wanted wear;" 5. "Because it was grassy and wanted wear;" 6. Refle…
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name:period:the road not takenby robert frosttwo roads diverged in a ye…
1. $A,B,A,B,B$ 2. "In leaves no step had trodden black." 3. First-person (I/me/my perspective) 4. "Because it was grassy and wanted wear," 5. "Because it was grassy and wanted wea…
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1. when the molecules of gases are heated, the average kinetic energy o…
1. True 2. True 3. True
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what does the creature think causes felix, agatha, and delacey to be un…
1. c. The hardship of poverty. 2. b. Lucretius
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why are physical properties such as hardness or cleavage useful to geol…
D. Physical properties are unique to each mineral and are determined by the mineral's chemical composition and atomic structure
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level: 3 challenge 5 of 5 score: 5 start over $4\\ nh_3 + 6\\ no \ ight…
- $\text{N}_2$: 5 - $\text{H}_2\text{O}$: 6 - Leftover $\text{NH}_3$: 0 - Leftover $\text{NO}$: 0 The product box should contain 5 $\text{N}_2$ (blue-blue molecules) and 6 $\text{…
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a sample contains carbon and hydrogen in the amounts shown in the data …
D. 25%
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a 48 g sample is composed of 38 g of fluorine (f) and 10 g of boron (b)…
79%
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which element does the electron configuration $1s^22s^22p^2$ represent?…
C. C
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identify the following as an element or compound. chromium(ii) oxide (c…
compound
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in which block of the periodic table is uranium (u) found? ○ s block ○ …
f block
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how is this substance classified? it has the formula xz. a homogeneous …
a compound
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which of these techniques can be used to effectively separate an undiss…
settling, then decantation
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unit exam - matter and change what separation technique is illustrated …
evaporation
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which of these mixtures would best separate using distillation?powdered…
honey and tea
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which is the electron configuration for lithium? 1s² 2s³ 1s²2s¹ 1s¹2s²
): $1s^2$ ## Step3: Remaining electron to 2s orbital 1 electron left, fills the 2s orbital: $2s^1$ ## Step4: Combine orbitals Combine to get full configuration: $1s^22s^1$
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which element has 32 protons in its nucleus?○ phosphorus○ cobalt○ germa…
germanium
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what technique effectively separates mixtures of liquids that have diff…
distillation
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classify the following as a heterogeneous mixture (suspension), homogen…
homogeneous mixture (solution)
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what did kittys mother mistakenly think was causing the unusual smell a…
Roasting chickens
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which substance is a mixture? ○ table salt ○ gasoline ○ aluminum ○ carb…
gasoline
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unit exam - matter and change compare the total mass of the reactants t…
161 g ZnSO₄ → 81 g ZnO + 80 g SO₃
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air is made up of different gases, such as oxygen, nitrogen, and carbon…
compound substance; all meet the definition of pure substances (uniform, unchanging composition). The other options are incorrect: these substances can react with other chemicals …
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unit exam - matter and change compare the total mass of the reactants t…
C. $78\ \text{g K} + 71\ \text{g Cl}_2 ightarrow 149\ \text{g KCl}$
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which statement best describes how electrons fill orbitals in the perio…
Electrons fill orbitals in order of their increasing energy from left to right.
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unit exam - matter and change which of these changes is an example of a…
polishing a gemstone
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which of these changes is an example of a chemical change? broken glass…
cooking an egg
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in which orbitals would the valence electrons for selenium (se) be plac…
s orbital and p orbital
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unit exam - matter and change menthol section 2: health hazards liquid …
toxic if used with personal protective equipment
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a single atom of an element has 11 protons, 11 electrons, and 12 neutro…
B. Na
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which of these is an example of a physical property? sodium oxidizes in…
Table salt is a white crystal.
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iron, an element with the chemical symbol fe, is an important element. …
with a high probability of containing the electron) around the nucleus. The other statements are consistent with both Dalton's theory and modern atomic theory: Dalton proposed ele…
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to show the electron configuration for an atom, when would it be better…
electrons in subshells. Orbital notation (e.g., box diagrams) explicitly represents individual orbitals and can show the spin state of each electron using arrows, which written co…
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which physical method can be used for obtaining a sample of salt from a…
ing is for separating solid mixtures, not dissolved solids from liquids.
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which pure substance can be classified as an element? $ce{h_{2}}$ $ce{n…
atoms, so it is an element. - $\text{NO}_3$: Contains nitrogen + oxygen, compound. - $\text{NaCl}$: Contains sodium + chlorine, compound. - $\text{H}_2\text{SO}_4$: Contains hydro…
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which of the following symbols would be included in the noble gas notat…
number 36, which ends the 4th period). Kr's electron configuration is $[Ar] 3d^{10} 4s^2 4p^6$, so elements with 5s valence electrons use Kr as the noble gas core.
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select the correct answer which of these periods contain elements with …
D. periods 6-7
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select the correct answer which of these elements has four total electr…
D. sulfur (S)
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3 select the correct answer which of these elements is an alkaline eart…
B. calcium (Ca)
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select the correct answer how does the modern periodic table arrange el…
B. by atomic number
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1 select the correct answer. which of the following elements is an alka…
A. potassium (K)
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(16) (geographers, mineralogists, zoologists, astronomers) have identif…
16. Mineralogists 17. rock-forming 18. deposits 19. organic 20. coal 21. Anthracite 22. Coke 23. luster 24. Malleability; Ductility 25. iron 26. ores 27. veins 28. Mining 29. loca…
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2. write pe next to the types of potential energy and ke next to the ty…
PE gravitational KE sound PE chemical PE nuclear KE radiant KE thermal PE elastic KE electrical
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 the…
6) that is less than 50. Noble-gas notation uses the preceding noble gas to represent core electrons, so tin's noble-gas notation starts with [Kr].
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 in whi…
orbitals belong to the f block of the periodic table, which includes the actinide series where uranium is classified.
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 tim…
als to complicate configurations). Later p-block elements have filled inner d/f orbitals, making electron configuration determination more complex. The other options are incorrect…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 how…
A. 1
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(2½ points each) ask jesus to help you as you take your test. do your b…
## Matching Answers: 1. (C) color 2. (I) streak 3. (F) hardness 4. (H) specific gravity 5. (G) luster 6. (A) acid test 7. (D) crystal structure 8. (B) cleavage 9. (E) Geiger count…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 which …
noble gas with the highest atomic number less than 17, with 10 electrons. ## Step3: Calculate remaining electrons $17 - 10 = 7$ electrons left to assign. ## Step4: Fill valence or…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 whi…
2. ## Step2: Find nearest noble gas core Radon (Rn, atomic number 86) is the preceding noble gas, so we use [Rn] as the core. ## Step3: Calculate remaining electrons $102 - 86 = 1…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 1 whic…
, 2s holds 2, leaving 4 electrons for the 2p orbital, resulting in the configuration $1s^2 2s^2 2p^4$.
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 the…
by Aufbau principle Fill 1s first (holds 2 electrons): $1s^2$ (2 electrons used, 5 left) Fill 2s next (holds 2 electrons): $2s^2$ (4 electrons used, 3 left) Fill 2p (holds 6 elect…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 wha…
2
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 tim…
$$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^3$$ ## Step3: Analyze orbital filling - 4s: $4s^2$ (full, holds max 2) - 3d: $3d^{10}$ (full, holds max 10) - 4p: $4p^3$ (partial, holds…
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})$
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i see you shining like a jewel of night, you, possibility maker, dream-…
B. abba acca
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what type of chemical reaction is shown: $2\\ n_2 + o_2 \ ightarrow 2\\…
Synthesis
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what type of chemical reaction is shown: $2\\ al + cr_2o_3 \ ightarrow …
B. Single Replacement
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what type of chemical reaction is shown:$ce{h_{2}so_{4} + 2 nacn -> 2 h…
Double Replacement
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which is a reactant in the chemical reaction shown: $ce{h_{2}so_{4}} + …
A. $\text{H}_2\text{SO}_4$, C. $\text{NaCN}$
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how many atoms of chlorine are in 5 cucl₂? 2 10 5 1
10
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what type of chemical reaction is shown: $ce{h_{2} + cl_{2} -> 2 hcl}$ …
Synthesis
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what type of chemical reaction is shown: $ce{h_{2}so_{4} + 2 nacn -> 2 …
Double Replacement
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how many molecules are in 8 naoh? 4 1 8 2
8
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how many molecules are in 6 cacl₂? 6 4 12 1
6
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which is a product in the chemical reaction shown: $2\\ n_2 + o_2 \ igh…
$\text{N}_2\text{O}$
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unit review - matter and change skip a 150 g sample is composed of 90 g…
40%
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uestions.ifferent amounts of saltder to measure the effectup of positiv…
D. to determine the effect of salt on water's boiling point
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unit review - matter and change skip a 250 g sample is composed of 131 …
52.4% (corresponding to the option: 52.4%)
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how many atoms of hydrogen are in $4\\ \\text{ca(oh)}_2$? 1 8 2 4
B. 8
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unit review - matter and change skip how is this substance classified? …
a. a compound
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unit review - matter and change skip identify the following as an eleme…
element
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what type of chemical reaction is shown: $3\\text{fe} + 4\\text{h}_2\\t…
Single Replacement
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what type of chemical reaction is shown: $3\\text{fe} + 4\\text{h}_2\\t…
Single Replacement
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what separation technique is illustrated in the picture?evaporationdist…
evaporation
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what type of chemical reaction is shown: $ce{pcl_{5} -> pcl_{3} + cl_{2…
Decompostion
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unit review - matter and change skip what method would separate a mixtu…
Use a magnet to attract the iron.
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unit review - matter and change skip distillation of cherry-vanilla col…
the sugar remaining in the flask
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skip based on the order the substances come out of the distillation, wh…
the cherry ester
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unit review - matter and change skip classify the following as a hetero…
heterogeneous mixture (suspension)
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unit review - matter and change which sample represents a suspension? t…
sample 3
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un neutral as el átomo tiene electrón(es) de valencia
5
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unit review - matter and change skip compare the total mass of the reac…
C. $58\ \text{g Mg(OH)}_2 ightarrow 40\ \text{g MgO} + 18\ \text{g H}_2\text{O}$
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un neutral rn el átomo tiene ____ electrón(es) de valencia. mostrar tab…
8
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unit review - matter and change compare the total mass of the reactants…
161 g ZnSO₄ → 81 g ZnO + 80 g SO₃
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unit review - matter and change skip which of these changes is an examp…
dry ice changes from solid into a gas when heated
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unit review - matter and change skip which of these changes is an examp…
burning jet fuel
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unit review - matter and change skip what state of matter is the materi…
Gas