化学
化学反応、化学量論、分子構造、元素の性質。
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part 1: read the following information on elements, compounds and mixtu…
- Diamond (C): E - Sugar ($C_6H_{12}O_6$): C - Milk: M - Iron (Fe): E - Air: M - Sulfuric Acid ($H_2SO_4$): C - Gasoline: M - Electricity: X - Krypton (K): E - Bismuth (Bi): E - U…
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what type of change is occurring in this candle? explain?
Both physical and chemical changes. Physical change: Wax melting (change of state from solid to liquid). Chemical change: Wax (hydrocarbon) reacting with oxygen to form carbon dio…
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which statement best describes what happens during a chemical change? b…
Both the identity and the properties of a substance change.
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justin is making a snack. he toasts a piece of bread and spreads peanut…
one
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which laboratory activity involves a chemical change? leaving a copper …
leaving a copper penny in vinegar until it turns green
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which use of iron is due to its chemical properties? producing colored …
Producing colored sparks in fireworks.
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13. hydrogen, lithium, sodium, and potassium are all in the same group.…
13. They have the same number of valence electrons. 14. False
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26: (1 pt) represent the electron configuration of an ion of oxygen wit…
A. Silver, Ag
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25. *(1 pt) represent the electron configuration of an ion of oxygen wi…
A. Silver, Ag
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10. fill in the blank: elements are made up of only one type of 11. why…
10. atom 11. Because they are the simplest form of matter in terms of chemical composition and have a fixed atomic structure with no bonds (within the element - in its pure form) …
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which statement is the best description of a chemical reaction? o mixin…
forming or breaking bonds
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which statement describes an endothermic reaction? o no energy is trans…
Energy is absorbed by the reaction.
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which statement accurately describes the products of a reaction? ○ subs…
new substances that are present at the end of a reaction
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what has occurred if a decrease in temperature accompanies a reaction? …
Energy was absorbed.
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26 physical science 1 perties of matter and atoms which element is clas…
Rb
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which statement best describes how electrons fill orbitals in the perio…
Elements fill orbitals in order of increasing energy from top to bottom in each group.
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what is the atomic number of zirconium? 39 40 41 42
40
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which element is the most reactive? carbon sodium nickel oxygen
sodium
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9. write the electron configuration and abbreviated electron configurat…
a. Electron configuration: \(1s^{2}2s^{2}2p^{5}\); Abbreviated electron configuration: \([He]2s^{2}2p^{5}\) b. Electron configuration: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}\); Abbrevia…
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hydrogen has three isotopes ( ^{1}h ), ( ^{2}h ), and ( ^{3}h ). what i…
The number of neutrons ranges from 0 to 2.
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which evidence is an indication that a chemical reaction has occurred? …
formation of a gas
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air is made up of different gases, such as oxygen, nitrogen, and carbon…
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.
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among the elements of the main group, the general trend in the first io…
The ionization energy decreases because the full \(s\) orbital shields the electron entering the \(p\) orbital.
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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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properties of matter and atoms how many valence electrons does aluminum…
3
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which element has the largest atomic radius? as p n sb
Sb (antimonio) tiene el radio atómico más grande entre los elementos dados.
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which best explains why ionization energy tends to decrease from the to…
Electrons get farther from the nucleus.
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8. label each of the following sets of quantum numbers as valid or inva…
| \(n\) | \(l\) | \(m_l\) | \(m_s\) | valid or invalid? | |---|---|---|---|---| | \(1\) | \(0\) | \(0\) | \(\frac{1}{2}\) | valid | | \(1\) | \(1\) | \(+1\) | \(-\frac{1}{2}\) | i…
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which process is a chemical change? boiling water melting ice breaking …
burning a match
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which element has 32 protons in its nucleus? cobalt phosphorus sulfur g…
germanium
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properties of matter and atoms which substance is a mixture? carbon dio…
gasoline
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the elements of which group are nonreactive? alkaline earth metals alka…
noble gases
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which statement describes an intensive property of matter? it depends o…
It is the same for every sample of a single substance.
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which pure substance can be classified as an element? no₃ nacl h₂so₄ h₂
\(H_2\)
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which physical method can be used for obtaining a sample of salt from a…
boiling
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a student is using a copper strip and a strong chlorine solution in her…
reactivity of the copper strip
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which of these symbols would be included in the noble gas notation for …
Xe
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which procedure could a student use to examine an intensive property of…
Determine the density.
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a single atom of an element has 11 protons, 11 electrons, and 12 neutro…
Na
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5. what are the possible ( m_{l} ) values for the following types of or…
a. \(m_{l}=0\) b. \(m_{l}=-1,0,+1\) c. \(m_{l}=-2,-1,0,+1,+2\) d. \(m_{l}=-3,-2,-1,0,+1,+2,+3\)
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when electrons are removed from the outermost shell of a calcium atom, …
a cation that has a smaller radius than the atom.
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using the following chemical equation, identify the reactants and produ…
- $\text{NaHCO}_{3}(s)$: Reactant - $\text{H}_{2}\text{O}(l)$: Product - $\text{CO}_{2}(g)$: Product - $\text{HC}_{2}\text{H}_{3}\text{O}_{2}(aq)$: Reactant - $\text{NaC}_{2}\text…
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question 1 of 10 read these lines from emily dickinsons poem \324\ (\so…
D. abab
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1. which of the following changes will increase the rate a. lowering th…
C. increasing the concentration of the reactants
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question 10 of 10 read these lines from emily dickinsons poem \712\ (\b…
C. abca
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imagine you are in a laboratory. you are explor the following reaction:…
Set up four reaction - mixtures: one with just \(A\) and \(B\) (control), and three others with \(A + B+X\), \(A + B + Y\), \(A + B+Z\). Measure the reaction times. The substance …
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as a review for our poem were reading tomorrow use your chromebook to h…
- For "What is poetic diction?": The specific word choice and style a poet uses to create tone, mood, and meaning. - For "Which is an example of an idiom?": She spilled the beans …
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what is the correct coefficient ratio to have the equation balanced? mg…
2:1:2
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as a review for our poem were reading tomorrow use your chromebook to h…
- For "What is poetic diction?": The specific word choice and style a poet uses to create tone, mood, and meaning. - For "Which is an example of an idiom?": She spilled the beans …
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question 4 of 10 read these lines from emily dickinsons poem \324\ (\so…
A. abab
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alternative swyk: reactions lab match the following chemical as either …
\(O_2\) - Reactant, \(Mg\) - Reactant, \(MgO\) - Product
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greenhouse gas major greenhouses gases greenhouse gases have what is kn…
CFCs
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greenhouse gas major greenhouses gases greenhouse gases have what is kn…
water vapor
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greenhouse gas anthropogenic causes there are natural causes and contri…
By cutting down the forest, we lose the forest's ability to remove greenhouse gases.
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4. what are the n and l values for the following orbitals? a. 2p b. 4d …
a. \(n = 2\), \(l = 1\) b. \(n = 4\), \(l = 2\) c. \(n = 5\), \(l = 3\)
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how many unpaired electrons would arsenic (as) have in its orbital diag…
3
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6) which point on the graph represents a gas? 7) the picture below repr…
6) e) E 7) c) London Dispersion 8) a) Heat energy flows from warmer object to cooler object 9) c) Gas 10) b) Its when a gas turns to a liquid
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states of matter quiz 1) which of the following is not an example of a …
1. a) Mass 2. b) Nitrogen 3. c) \(0\ K\) 4. c) \(C\) 5. b) Sublimation
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3. name the orbitals described by the following quantum numbers. a. ( n…
a. \(3s\) orbital b. \(3p\) orbital c. \(5d\) orbital
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which orbital diagram shows a violation of the aufbau principle? a) 1s …
A.
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use the dictionary entry to complete each sentence with the correct for…
The scientists will analyze the chemical. The lab determined that the compound was analyzable. The final analysis surprised everyone.
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which orbital diagram shows a violation of hunds rule? a) 1s 2s 2p b) 1…
D.
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how many electrons can inhabit the p subshell? 10 3 6 12 2
6
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pop quiz: electron configuration how many orbitals inhabit the d subshe…
5
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complete the passage: during the process of polymerization, combine by …
First blank: monomers; Second blank: polymer
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name chemistry i worksheet classification of matter and changes instruc…
1. Heterogénea 2. Homogénea 3. Homogénea 4. Heterogénea 5. Homogénea 6. Heterogénea 7. Heterogénea 8. Homogénea 9. Homogénea 10. Homogénea
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choose the element that has the electron configuration. of $1s^{2}2s^{2…
Sodium (\(Na\)) (the element with atomic number \(11\) in the periodic table)
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1. what is the electron configuration of a mn atom in the ground state?…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}\) (corresponds to the option \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}\) in the multiple - choice list)
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the blue numbers in the image below represent -----------------
coefficients
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1. what is the electron configuration of a mn atom in the ground state?…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}\) (corresponding to the option \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}\))
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identify the element from the periodic table that would have the electr…
The element is Sulfur (\(S\)) since its atomic number is \(16\).
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in science class, richard learns that petrol has a boiling point of 203…
$95^{\circ}C$
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question 9 of 25 during which type of change can an atom of one element…
B. Nuclear
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question 11 which of the following acts encouraged settlers to move wes…
Homestead Act
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which characteristics of dickinsons style are evident in the snow? sele…
four - line stanzas, a varying rhythm, the use of personification
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read the excerpt from \sonnet 29.\ when, in disgrace with fortune and m…
A. abab
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section 3.3 assessment reviewing concepts 1. name six common phase chan…
The mass of the pile of snow decreases because the snow undergoes sublimation. In sublimation, solid water (snow) directly changes to water vapor (gas). As water molecules escape …
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5. write lewis structures that obey the octet rule for each of the foll…
- a) For \(CHCl_3\): The Lewis structure has \(C\) in the center, single - bonded to \(H\) and three \(Cl\) atoms. Each \(Cl\) has three lone pairs. - b) For \(NH_4^+\): The Lewis…
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beryllium - 9 step 1. the atomic number of beryllium - 9 is _. step 2. …
Step 1: \(4\) Step 2: \(9\) Step 3: Top box: \(9\), bottom box: \(4\) Step 4: Yes, because atomic number \(4\) (from periodic table), mass number \(9\) (from name), notation follo…
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what measurement is often used in cooking that is compared to the mole …
d. Cups or tablespoons
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fluorine - 19 step 1. the atomic number of fluorine - 19 is _. step 2. …
1. \(9\) 2. \(19\) 3. \(\begin{matrix}19\\9\end{matrix}F\) 4. Yes. The atomic number of fluorine (\(9\)) is from the periodic table, the mass number (\(19\)) is given by the isoto…
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what does the mole help chemists predict in chemical reactions? a. how …
a. How substances will react
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what does one mole represent in chemistry? a. a specific number of part…
A. A specific number of particles, specifically particles
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what is avogadros number? a. the weight of one mole of a substance b. t…
B. The number of particles in one mole
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2. using lewis dot diagrams, show how sodium and oxygen react to form s…
The formula of sodium oxide is $Na_{2}O$.
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guided practice problems answer the following questions about practice …
- Step 1: atomic; 6 - Step 2: mass; 12 - Step 3: \(_{6}^{12}C\) (top box: 12, bottom box: 6) - Step 4: Yes
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4. the ionization energies of a given atom are $ie_1 = 5.139 kj/mol$, $…
The valence electron configuration is \(ns^1\). The large jump between \(IE_1\) and \(IE_2\) implies that the first electron is relatively easy to remove (low \(IE_1\)), and after…
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14. neon - 20 and neon - 22 are called ______________.15. is the follow…
14. isotopes 15. True 16. b. hydrogen 17. c. deuterium 18. a. tritium
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at 20°c the density of mercury is 13.6 g/cm³. what is the mass of 50.0 …
For the first question: B. \(6.80\times 10^{2}\ \text{g}\) For the second question: D. \(8.0\) cups
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question 6 the number of cubic centimeters (cm³) in 43.0 ml is a 4.30 c…
B. \(43.0\space cm^{3}\)
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convert 623 qts. to milliliters (1 l = 1.060 qt). a 5.88×10⁻¹ ml b 5.88…
B. \(5.88\times 10^{5}\ mL\)
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7. the total number of protons and neutrons in an atom is its 8. what i…
7. mass number 8. 4 9. 5 10. Top - left: mass number; Bottom - left: atomic number; \(Ne\): chemical symbol 11. neon - 22 12. Protons: 10; Neutrons: 12; Electrons: 10 13. They dif…
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1. your friend tells you that an element has 10 electrons. can you dete…
If the element is neutral, the element is neon. If it is an ion, we need to know the charge of the ion (to relate the number of electrons to the number of protons/atomic number).
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the number 4.89 rounded to two significant figures is a 4.90 b 5.0 c 5 …
B. \(21.4g/cm^{3}\)
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4. the ionization energies of a given atom are ie1 = 5.139 kj/mol, ie2 …
The valence electron configuration is $ns^1$. The reasoning is that there is a large jump from $IE_1$ (removing a valence electron) to $IE_2$ (removing a core electron), indicatin…
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how many centimeters long is this arrow? (1 inch = 2.54 centimeters exa…
C. \(5\)
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would the correct measurement be on the following graduated cylinder? a…
B. \(3.5\space mL\)
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27. what type of reaction is represented by the equation 2na + cl₂ → 2n…
d. Synthesis Reaction
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24. what does the unit \mole\ represent in chemistry? a. the number of …
d. Avogadro’s number of entities (atoms, molecules, ions)
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question 14 (1 point) danaisha does all her grocery shopping at organic…
C. Both, because needs vs wants are determined on an individual basis.