Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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which of the following pairs of atoms/ions is isoelectronic? o-2, s-2 c…
Br−1, Kr
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5) ___ c + ___ s₈ → ___ cs₂ 6) ___ na + ___ o → ___ na₂o
5) \(4C + S_8 ightarrow4CS_2\) 6) \(2Na+O ightarrow Na_2O\)
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question 10 1 pts match each orbital in the list below with the correct…
4d has five degenerate orbitals.
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match each orbital in the list below with the correct description for a…
\(2p\) has three degenerate orbitals.
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decide whether each pair of elements in the table below will form an io…
| element #1 | element #2 | Forms ionic compound? | empirical formula of ionic compound | name of ionic compound | |---|---|---|---|---| | barium | potassium | no | | | | fluorine…
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write the equilibrium constant expression for this reaction: h_{2}co_{3…
\(K=\frac{[H^{+}]^{2}[CO_{3}^{2 - }]}{[H_{2}CO_{3}]}\)
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consider a hypothetical chemical reaction: (in this equation a, b, c an…
- What is the heat of reaction? \(100\space kJ/mol\) - Is the reaction exothermic or endothermic? Endothermic - Can you determine the activation energy? Yes, it's \(300\space kJ/m…
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a chemist measures the energy change \\( \\delta h \\) during the follo…
- This reaction is endothermic. - Yes, absorbed. - $37.3\ \text{kJ}$
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a chemist measures the energy change (delta h) during the following rea…
- This reaction is: exothermic. - Suppose $60.8\space g$ of $NO_2$ react. Will any heat be released or absorbed?: Yes, released. - If you said heat will be released or absorbed in…
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a chemist measures the energy change \\( \\delta h \\) during the follo…
- This reaction is: endothermic - Will any heat be released or absorbed: Yes, absorbed - If heat is absorbed, the amount of heat: \(159\space kJ\)
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is when one relates similar objects to schemas one is already familiar …
D. Assimilation
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a chemist measures the energy change \\( \\delta h \\) during the follo…
- This reaction is exothermic. - Yes, released. - \(184\space kJ\)
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calculate the energy required to heat 0.80 kg of cyclohexane from 15.8 …
\(7.5\times 10^{3}\ J\)
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1. draw the electronic configuration diagram for cu. these are the boxe…
29
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consider the chemical equilibrium of the reaction. agcl(s) ⇌ ag⁺(aq) + …
The chemical equilibrium of the system shifts to the left.
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the united nations declared the year 2019 as the year of the periodic t…
- It has a full valence shell of electrons - It is relatively unreactive
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the electron dot diagram shows the arrangement of dots without identify…
tellurium (Te)
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which statement best describes how an ionic bond forms? the transfer of…
The transfer of electrons forms strong bonds between ions.
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which of the following can easily form an ionic bond with a cation? sr …
\(PO_{4}^{3 -}\)
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which statement describes a step in the formation of an ionic bond? an …
B. A metal atom forms a cation, and a nonmetal atom forms an anion.
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based on the periodic table, which other element is likely to share com…
Cs
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write the balanced net ionic equation for the reaction when hclo₃ and b…
$$H^{+}(aq)+OH^{-}(aq) ightarrow H_{2}O(l)$$
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when a firms new organic snack line fails during test marketing because…
1. Improved product positioning and brand differentiation 2. Burger King
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10. directions: fill in the following table with the correct names, sym…
| Isotope Name | Isotope Symbol | # of Proton | # of Neutrons | Atomic Number | Mass Number | |---|---|---|---|---|---| | Carbon - 12 | \(_{6}^{12}C\) | \(6\) | \(6\) | \(6\) | \(…
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what is hunds rule? when filling orbitals of equal energy, electrons fi…
For the first question (definition of Hund's rule): "When filling orbitals of equal energy, electrons fill them singly first, with parallel spins." For part B: "It is important in…
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what is hunds rule? when filling orbitals of equal energy, electrons fi…
When filling orbitals of equal energy, electrons fill them singly first, with parallel spins.
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conceptual checkpoint 9.6 - enhanced - with feedback part a which pair …
Ar and Ca
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the electron configuration for nitrogen is $1s^{2}2s^{2}2p^{3}$. accord…
Each of the \(2p\) - orbitals contains one electron.
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in the ( n = 3 ) principal shell, there are ____ subshells that are lab…
For the first question: 3; \(s\), \(p\), and \(d\) For the second question (assuming the correct electron - configuration is \(1s^{2}2s^{2}2p^{4}\)): \(1s^{2}2s^{2}2p^{4}\)
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part a which electron is, on average, farther from the nucleus: an elec…
On average, the \(4p\) electron is farther from the nucleus because it is in a larger orbital.
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which term best describes an orbital? view available hint(s) path exact…
probability
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which of the following statements about the quantum - mechanical model …
Electrons do not behave as particles, Orbitals are specific paths electrons follow, All of the above are correct statements.
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question 4 sensory receptors for all of the following adapt quickly to …
A. Pain receptors
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question 3 the meissners corpuscles and pacinian corpuscles are what ty…
A. Mechanoreceptors
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question 2 at the same time, the sensation is being formed the brain us…
A. Projection
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part a which of the following statements about the quantum - mechanical…
Electrons do not behave as particles; Orbitals are specific paths electrons follow; All of the above are correct statements.
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which of the following statements about the quantum - mechanical model …
Electrons do not behave as particles.
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which diatomic molecule has the largest dipole moment? answer: a hf b h…
A. HF
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draw the lewis structure of icl₄⁻ and then determine its electron domai…
B. octahedral / square planar
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blood tests done with pregnant women routinely test for all of the foll…
A. vitamin C
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the overall charge is -1 for the lewis structure shown below. choose th…
B. N, P, or As
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the overall charge is -1 for the lewis structure shown below. choose th…
B. N, P, or As
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the overall charge is -1 for the lewis structure shown below. choose th…
B. N, P, or As
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how many valence electrons does calcium have?
2
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a lewis structure for the molecule phenol (c₆h₅oh) is shown. based on t…
B. Polar
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how many valence electrons does bromine have?
7
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matching careers with clusters: part 3 match each job example with its …
Deb is a Video Game Designer - Information Technology Israel is a Cashier - Marketing, Sales, and Service Rakhee is an Aircraft Structure Assembler - Manufacturing Arnie is a Chem…
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how many valence electrons does silicon have?
4
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a lewis structure with placeholder elements is shown. if the formal cha…
D. Cl, Br, or I
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which structures below are plausible resonance contributors for scn⁻? a…
E. II and IV
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which structures below are plausible resonance contributors for scn? as…
A. I and II
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part 1 - general science mayonnaise is an example of a a precipitate. b…
B. an emulsion.
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activity a (continued from previous page) 5. practice: write the formul…
\(H_2\), \(SCl_2\), \(HNO\)
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activity a: simple molecules get the gizmo ready: • check that the free…
1. (Depends on user's simulation, no specific answer can be given from the text, user - dependent) 2. Carbon: 4; Nitrogen: 3; Chlorine: 1; Sulfur: 2; Hydrogen: 1; Oxygen: 2; Great…
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practice: fill in the chart below with numbers of each subatomic partic…
| Symbol | Mass number | Atomic number | Number of electrons | Number of protons | Number of neutrons | |---|---|---|---|---|---| | \(^{7}\text{Li}\) | 7 | 3 | 3 | 3 | 4 | | \(^{4…
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what quantity in atoms of silicon are produced by the complete reaction…
\(0.33mol\) (rounded to two significant figures)
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student exploration: molecule builder vocabulary: chemical bond, chemic…
1. 2 2. 1 3. It refers to the number of hydrogen atoms (2 hydrogen atoms). 4. 2 5. 1 6. A chemical bond forms between the hydrogen and oxygen atoms.
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what property, determined by the periodic table location, suggests that…
C. The number of valence electrons they possess.
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the arsenic substitution failed partly because the arsenate compounds w…
Differences in atomic radius and bond strengths compared to the essential element.
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complete the following table. identify the type of bonding in each subs…
\(BaO\) has the highest melting point.
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using the concept of elemental substitution, identify two different ele…
- One substitution: Sulfur (\(S\)) for oxygen (\(O\)). - Another substitution: Phosphorus (\(P\)) for nitrogen (\(N\)).
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phosphorus compounds (like phosphate) are known to interact strongly wi…
An arsenic - chlorine compound would not interact strongly with water. Because arsenic - chlorine compounds are non - polar and water is polar, and non - polar substances do not h…
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based on its location in the same group as phosphorus, describe arsenic…
(A) 5 (B) 3
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why did scientists hypothesize that arsenic (as) might be able to subst…
Scientists hypothesized that arsenic (As) might substitute for phosphorus (P) because they are in the same group (Group 15) of the Periodic Table. They have similar valence - elec…
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which of the following statements is true about the molecules shown bel…
The first molecule (a) is chiral, and the second molecule (b) is achiral.
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what quantity of moles of h₂so₄ are required to completely react with 7…
\(10.8\)
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edit the following statement to correct any errors. if the statement do…
On the surface, digital photography can seem simpler than film photography, because digital photography does not require access to chemicals or a darkroom.
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this brown spirit is made from a fermented mash of grain to which barle…
Whisky
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question 7 3 tries left the quality of beer is determined by the qualit…
water
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multiple - choice question which statement best describes carbon? it is…
Carbon can form many compounds and it can take many forms.
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multiple choice question why is studying extreme environments on earth,…
C. Studying the limits to life (cold, hot constraints) on Earth helps astrobiologists constrain where and how to look on other planetary bodies.
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chapitre 1.3 : les molécules sec2 (0... 5. 4 atomes de carbone et 10 at…
\( C_6H_{12}O_6 \)
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which of the statements is true about the following structure? ch2oh | …
There is only one chiral carbon in the structure.
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how many chiral centers are there in the compound below? your answer sh…
1
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chapitre 1.3 : les molécules sec2 (0... quelle molécule (formule molécu…
2. NH3 3. H2O 4. Cl2 5. C4H10 6. H2O2
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chapitre 1.3 : les molécules sec2 1. le dihydrogène et le dioxygène son…
Elles sont perdues. L'eau a de nouvelles propriétés.
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what is meant by anomeric carbon? select the correct answer below: it i…
C. It is the carbon where the hydroxyl group can be arranged up or down in the Haworth structure depending on how the ring closes.
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question what type of functional group is formed by the glycosidic link…
C. ether group
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identify the glucose anomer based on the hydroxyl position from the fol…
β-glucose
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how many valence electrons does nitrogen have?
5
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a lewis structure with placeholder elements is shown. if the formal cha…
D. N, P, or As
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a lewis structure with placeholder elements is shown. if the formal cha…
C. B or Al
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a lewis structure with placeholder elements is shown. if the formal cha…
C. \(Cl\), \(Br\), or \(I\)
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a lewis structure with placeholder elements is shown. if the formal cha…
D. N, P, or As
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water is a polar molecule because answer: a water is a bent molecule an…
A. water is a bent molecule and oxygen is more electronegative than hydrogen.
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which of the following is not one of the functions of the skin?delivers…
Gives the body its overall shape, loss of this function can be seen with the drooping of skin with age.
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in passage 1, what rhyme scheme does the first stanza use? aaabbccdda a…
AAABBCCDDA A
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question how many chiral carbons are there in the compound shown below?…
2
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question how many chiral carbons are there in the compound shown below?…
2
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how many chiral carbons are there in the compound shown below? • your a…
2
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follow - up questions: 1. do metals form anions or cations? 2. what is …
1. Cations 2. \(+1\) 3. \(+2\) 4. \(-1\) 5. No. Ionic bonds form due to electrostatic attraction between oppositely - charged ions (cation - anion). Cation - cation or anion - ani…
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how many carbon atoms are there in the fischer projection shown below? …
3
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what can be inferred about the pair of molecules shown below? select th…
The molecules are identical.
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submit answer try another version 3 item attempts remaining how many ra…
| orbital | # radial nodes | # angular nodes | | ---- | ---- | ---- | | \( 5f \) | \( 1 \) | \( 3 \) | | \( 2s \) | \( 1 \) | \( 0 \) | | \( 5f \) | \( 1 \) | \( 3 \) |
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label the orbitals described by each of the following sets of quantum n…
(a) \(5d\) (b) \(7f\) (c) \(4f\)
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solution of the schrodinger wave equation for the hydrogen atom results…
- When \( n = 2 \), \( l \) ranges from \( 0 \) to \( 1 \), total number of orbitals at \( n = 2 \) is \( 4 \). - When \( l = 0 \), \( m \) ranges from \( 0 \) to \( 0 \), total n…
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question 17 not yet answered marked out of 1.00 flag question which of …
- Question 17: C. Role - Question 18: A. Organic solidarity
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what is the relationship between n, ℓ, and the total number of nodes? t…
The total number of nodes (planar + spherical) is \( n - 1\).
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a lewis structure for chlorate (clo₃⁻) is shown, however, its formal ch…
The correct Lewis structure has one \(Cl = O\) double bond and two \(Cl - O\) single bonds. The \(Cl\) atom has no lone pairs, the double - bonded \(O\) has two lone pairs, and ea…
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a compound that contains aluminum and cyanide. name formula
Name: Aluminum cyanide Formula: \(Al(CN)_3\)