Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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question 4 (1 point) potential energy diagram use the potential energy …
the activation energy of the forward reaction
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uphill is the nature of which among the following type of reactions? en…
Endothermic reactions
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what type of energy is transferred when substances of two different tem…
Kinetic energy
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question 3 (1 point) consider the following reaction mechanism. changin…
A. A
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identify the system that can neither exchange matter nor energy with it…
Isolated system
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question 2 (1 point) which factor will not affect the rate of the follo…
an increase in pressure
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the metastable curve represents______of supercooled water. volume densi…
vapor pressure
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question 1 (1 point) for an exothermic reaction, what does the activati…
the heat of reaction plus the activation energy of the forward reaction
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the horizontal lines on a cooling curve represent: i. a temperature cha…
II and III
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what is kept constant in the coffee - cup calorimeter? volume pressure …
Pressure
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question 8 the atomic number (z) represents the number of _. neutrons p…
protons
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question 6 points 2 substance \x\ does not dissociate completely into i…
weak base
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identify the monoacidic base. mg(oh)2 al(oh)3 koh ca(oh)2
\(KOH\)
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question 4 points 1 ______ is used to separate ferromagnetic substances…
Magnetic separation
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question 3 points 3 which of the following statements describes the sep…
Salt is isolated from seawater through evaporation.
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which of the following is not a solution?brasscarbon dioxideairsea water
Carbon dioxide
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question 1 points 1 the normality of 1 m hcl is _. 4n 0.5n 2n 1n
1N
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1. using the following reactions, calculate the heat of formation, δh_f…
1. The heat of formation of \(CS_2\) is \(128.02\ kJ\) 2. The heat of combustion of fuel per gram is \(582.4\ kJ/g\)
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question 10 (1 point) why does an increase in concentration increase th…
The number of collisions increases.
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when using a calorimeter, the initial temperature of a metal is 70.4°c.…
The final temperature of the metal: \(29.8^{\circ}C\) The temperature change of the water: \(6.2^{\circ}C\) The temperature change of the metal: \(-40.6^{\circ}C\)
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pick out the incorrect statement(s) about endothermic reaction. bond en…
Energy profile diagram shows a downhill trend.
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based on what you have learned about the units for measuring thermal en…
1. joule (\(J\)) 2. specific heat capacity 3. unit mass (e.g., kilogram, \(kg\)) 4. degree (e.g., degree Celsius, \(^{\circ}C\)) 5. \(J/(kg\cdot^{\circ}C)\) (joules per kilogram p…
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which among the following possesses the maximum energy in an exothermic…
Reactants
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question 7 points 2 in the energy profile diagram for the formation of …
Hydrogen gas (\(H_{2}\)) and oxygen gas (\(O_{2}\))
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pick out the correct value for an exothermic reaction. 1358kj/mol -478k…
-478kJ/mol
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based on the given energy profile, predict the one with the lowest stab…
b and a
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question 4 points 1 the enthalpy change for an exothermic reaction is a…
negative
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question points 1 a chemical reaction in which energy is released in th…
exothermic reaction
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analyze the given energy profile diagram and choose the correct answer …
Activation energy is greater than the enthalpy change.
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question 1 points 1 endothermic reactions will _________ energy from th…
absorb
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question 10 points 2 in a coffee - cup calorimeter, what is the effect …
The surroundings lose heat.
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how to do a testicular self - exam (tse) the american cancer society re…
4. To avoid mistaking it for a lump. 5. Exposure to X - rays or other radiation, toxic chemicals or lead, diseases such as mumps.
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select the two sentences that use the word correctly. after you have ma…
A mild acid may be used in cleaning products. Be careful with the acid, so that it does not spill.
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the passage below describes a process of scientific inquiry. select the…
"Instead, the materials must somehow feel different even though they have the same temperature. She asked her chemistry teacher about it, and he explained that metals have a lower…
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decide whether these proposed lewis structures are reasonable. proposed…
- For \(H - C - C - H\): No, it has the wrong number of valence electrons. The correct number is \(10\). - For \([H - O - H]^+\): No, it has the wrong number of valence electrons.…
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what is the ability of a substance to be rolled or pounded into a thin …
Malleability
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a common chemical reaction involves two ionic compounds that exchange i…
For reactants: \(LiOH + SrCl_{2}\) For products: \(Sr(OH)_{2}+LiCl\)
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choose the answer that means the same as the word flashed. think carefu…
chemical substance that breaks down some materials
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in which of the following sets is the symbol of the element, the number…
- For the first question: In, 49 protons, 49 electrons. - For the second question: fluorine.
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how does atomic radius change from left to right across a period in the…
1. It tends to decrease. 2. It tends to increase.
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give the ion symbol for the ion that has 15 protons and 18 electrons.
\(P^{3 -}\)
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heat is most closely related to which kind of energy? nuclear electrica…
thermal
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question 7 points 1 identify the correct relation. δe system = -δe surr…
$\Delta E_{\text{system}} = -\Delta E_{\text{surroundings}}$
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question 6 points 1 what type of energy is stored in coal? chemical ene…
Chemical energy
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what happens when water is released from a dam? potential energy is con…
Potential energy is converted into kinetic energy
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combustion of 1 g of benzoic acid releases 26.42 kj. which of the follo…
\(5.652\space kJ/^{\circ}C\) (the fourth option)
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which of the following occurs when an endothermic reaction takes place …
Heat is absorbed from the water and from the calorimeter.
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if this decay has a half - life of 10.2 years, what mass of 60.8 g carb…
15.2
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spell out the full name of the compound. (b)
2 - methylbutan - 2 - ol
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question 2 points 2 which of the following statements is correct about …
Coffee - cup calorimeter is made of styrofoam cups and is an isolated system.
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what happens to the temperature of the water in a coffee - cup calorime…
The temperature of the water decreases.
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name: date: q2 chemistry: u3l9 pes day 1 prepwork part 2: pes spectra o…
1. C. The one with higher binding energy has more protons 2. B. More electrons in that sublevel
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(b) oh h2c-ch-ch3 h3c spell out the full name of the compound. you have…
2 - methyl - 2 - butanol
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(c) $h_3c - ch_2 - ch_2 - ch - ch_2 - ch_2 - oh$ $h_2c - ch_3$ spell ou…
4 - ethylheptan - 1 - ol
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(d) spell out the full name of the compound.
3 - methyl - 3 - pentanol
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part d h₃c—ch₂—c≡c—hc—ch₂—ch₃ | ch₂—ch₃ spell out the full name of the …
5 - ethyl - 3 - heptyne
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spell out the full name of the compound.
2,5 - dimethyl - 3 - hexyne
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part c spell out the full name of the compound. submit request answer
2,4 - dimethyl - 3 - hexyne
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spell out the full name of the compound.
3 - isopropyl - 1 - hexyne
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part a hc≡c−ch₂−ch₂−ch₃ spell out the full name of the compound.
1 - pentyne
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(f) h₃c—hc—c=c—ch₃ alkyne alkane alcohol amine ketone alkene ester alde…
alkene
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(e) h₃c—hc—ch₂—o—ch₃ ch₃ amine ketone alkane alcohol ether ester carbox…
ether
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(d) h₃c—hc—ch₂—c—oh ch₃ ester alkene alkane aromatic ketone alcohol ami…
carboxylic acid
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(c) h₃c—hc—c—ch—ch₃ ch₃ ch₃ aromatic amine carboxylic acid alkyne ester…
alkane
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(b) $h_3c - hc - ch_2 - nh - ch_2 - ch - ch_3$
amine
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(a) $h_3c - ch_2 - hc - ch_2 - oh$ $|$ $ch_3$ ether alcohol amine alken…
alcohol
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question 5 (1 point) potential energy diagram use the potential energy …
the activation energy of the forward reaction
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ch₃ - ch = ch - ch₃ + h₂ →
$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$$
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part c (c) h₃c—ch₂—ch₂—ch—ch₂—ch₂—oh | h₂c—ch₃ spell out the full name …
4 - ethylheptanol
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a number indicating the position of th the base chain of this alcohol c…
2 - methyl - 2 - butanol
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the base chain of this alcohol contains four carbon atoms. part b (b) s…
2 - methyl - 2 - butanol
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question 5 (1 point) potential energy diagram use the potential energy …
the activation energy of the forward reaction
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part a (a) spell out the full name of the compound.
2 - butanol
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(d) h₃c - hc - ch - ch = ch₂ h₃c ch₂ ch₃ spell out the full name of the…
3,4 - dimethyl - 1 - hexene
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(d) spell out the full name of the compound. submit request answer
2,3 - dimethyl - 1 - hexene
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part c (c) spell out the full name of the compound. submit previous ans…
2,2 - Dimethyl - 1 - butene
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part c (c) $h_3c$ $h_3c - c - ch = ch_2$ $ch_3$ spell out the full name…
2,2,3 - trimethyl - 1 - butene
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question 1 (1 point) which factor will not affect the rate of the follo…
Question 1: B. an increase in pressure Question 2: D. A greater proportion of all the molecules possess kinetic energy that is equal to or greater than the activation energy.
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(c) spell out the full name of the compound. submit request answer
2,2,3 - trimethyl - 1 - butene
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(b) $h_3c - hc - ch = ch - ch_3$ $\\vert$ $ch_3$ spell out the full nam…
2 - methyl - 3 - pentene
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part b (b) $h_3c - hc - ch = ch - ch_3$ $\\underset{ch_3}{|}$ spell out…
2 - methyl - 3 - pentene
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part b (b) $h_3c - hc - ch = ch - ch_3$ $\\underset{ch_3}{|}$ spell out…
3 - methyl - 2 - pentene
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question 7 (1 point) which quantity does not increase when the temperat…
activation energy ### Question 8
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question 8 (1 point) consider the following reaction mechanism. changin…
A ### Question 9
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question 10 (1 point) why does an increase in concentration increase th…
The number of collisions increases.
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part a (a) h₃c—ch=ch—ch₂—ch₃ spell out the full name of the compound.
pent - 2 - ene
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part c (c) $h_3c - ch - ch - ch_3$ $h_3c$ $h_2c - ch_3$ 2-ethyl-3-methy…
2,3 - dimethylpentane
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part b (b) ch₂ - ch - ch - ch₂ - ch₂ - ch₂ - ch₃ h₃c h₃c h₃c 1,2,3 - tr…
3,4,5 - Trimethyloctane
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(b) ch₂ - ch - ch - ch₂ - ch₂ - ch₂ - ch₃ h₃c h₃c h₃c 1,2,3 - trimethyl…
3,4,5 - trimethyloctane
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part a (a) $h_2c - ch_2 - ch_2 - ch_3$ $\\begin{array}{l}ch_2 \\\\ | \\…
2 - methyl - pentane
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part a (a) $h_2c - ch_2 - ch_2 - ch_3$ $\\underset{\\underset{ch_3}{|}}…
2 - methyl - pentane
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part b (b) h₃c—ch—ch₂—ch₂—ch₃ h₂c—ch₃ 2-ethylpentane spell out the full…
3 - methylhexane
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part c (c) $h_3c - ch - ch - ch_2 - ch_3$ $\\begin{array}{c|c} & \\\\ c…
2,3 - dimethylpentane
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part b (b) $h_3c - ch - ch_2 - ch_2 - ch_3$ $h_2c - ch_3$ 2 - ethylpent…
3 - Methylhexane
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part a (a) h₂c-ch₂-ch₂-ch₃ ch₃ 1-methylbutane spell out the full name o…
2 - Methylpentane
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question 29 of 50 what happens when two nitrogen atoms share electrons?…
D. They form a covalent bond
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type the charge of the each ion, then type the name of each compound be…
For \(CuCl_3\): \(Cu^{3 +}\), \(Cl^{-}\), copper(III) chloride. For \(CrP\): \(Cr^{3+}\), \(P^{3 -}\), chromium(III) phosphide.
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type the charge of the transition metal, then type the name of each com…
For PbO₂: Charge of Pb is \(+4\), name is lead(IV) oxide. For CuN: Charge of Cu is \(+3\), name is copper(III) nitride.
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part 2: fill - in - the - blank (2 points each, 8 points total) instruc…
25. ion 26. electronegativity 27. cation 28. valence
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how many oxygen atoms are in this chemical formula? 4 oxygen atoms 3 ox…
6 oxygen atoms