Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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noble gas configuration practice complete the following practice assign…
[A. [Xe]4f¹⁴5d¹⁰6s¹]
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question 1 of 10 which sentence is the best example of foreshadowing? a…
C. Even though he should have been studying for the chemistry test, Corey decided to go to the movies instead.
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based on the activity series, which of the reactions will occur? most r…
\(K + Fe(NO_3)_2\to\)
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based on the activity series, which of the reactions will occur? most r…
Only \(Al + Ag_2SO_4\to\) will occur.
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based on the activity series, which of the reactions will occur? most r…
\(Li + Zn(ClO_3)_2\to\)
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based on the activity series, which one of the given reactions will occ…
\(Zn + HNO_3\to\)
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based on the activity series, which of the reactions will occur? most r…
\(Fe + SnSO_4\to\)
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the volume of a sample of gas (2.49 g) is 752 ml at 1.98 atm and 62°c. …
\(NO_{2}\)
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which statement correctly compares an atom of an alkali metal with an a…
The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.
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chromium, calcium, and potassium are near each other on the periodic ta…
potassium, calcium, chromium (the third option)
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the most reactive metals are located in which area of the periodic tabl…
far left
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you have a 0.5 m mgso4 stock solution available. calculate the volume o…
\(0.8\space L\) (Option 3)
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which element is most likely to bend without breaking? carbon (c) iodin…
Cobalt (Co)
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elements are organized on the periodic table based on their properties.…
Rubidium (Rb) is more reactive than strontium (Sr) because strontium atoms must lose more electrons.
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atoms of elements at the top of a group on the periodic table are small…
The valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.
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mrs. franklin loves teaching science and thinks about it all the time. …
ductility and malleability
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10. state two misconceptions of dalton’s atomic theory.
1. Atoms are indivisible (disproven by discovery of sub - atomic particles). 2. All atoms of an element are identical (disproven by isotopes).
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based on its location on the periodic table, which metal is likely to b…
A. potassium (K)
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what best explains the difference in melting points between cl₂ (-101.5…
Increased number of electrons in chlorine.
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a student extracts the colour from some green smarties and uses paper c…
the blue is more strongly adsorbed onto the stationary phase and is less soluble in the mobile phase.
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a sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperat…
\(0.67\ \text{atm}\)
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1. liquids are more ordered than gases because liquids have? stronger i…
stronger intermolecular forces and lower mobility of the particles.
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what is the correct order of the orbitals? fdps spdf dfps
spdf
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6. what is the noble gas shortcut configuration for pd? a. kr4d^8 d. xe…
b. [Kr]5s²4d⁸
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5. what does the electron configuration for pd end with? b. $5d^{8}$ c.…
d. \(4d^{10}\) (assuming the option \(d\) was supposed to be \(4d^{10}\) as the correct electron - configuration ending for Pd. If the options are as they are with no typo, there …
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question 22 (mandatory) (5 points) rank the following molecules from hi…
1. Ethanedioic acid 2. Propanol 3. Ethyl methyl ether 4. But - 1 - yne 5. Butane
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determine which of the following electron configurations are not valid:…
16) Invalid (Aufbau principle violation). 17) Invalid (Pauli exclusion principle violation). 18) Invalid (Aufbau principle violation). 19) Valid. 20) Invalid (incomplete).
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the surface tension of isopropanol in air has a value of 23.00 units an…
A. Isopropanol will have a lower boiling point than water because the forces between the molecules are smaller. B. Isopropanol will have a flatter meniscus than water because the …
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question 20 (1 point) in a(n) ___i___reaction, a(n) ___ii___ combines w…
c) A
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margarita set up three vials on a hot plate. she poured the same amount…
A. The vials were different shapes.
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in the space below, write the abbreviated electron configurations of th…
6) \([Ar]4s^{2}3d^{7}\) 7) \([Kr]5s^{1}4d^{10}\) 8) \([Kr]5s^{2}4d^{10}5p^{4}\) 9) \([Rn]7s^{2}\) 10) \([Rn]7s^{2}5f^{14}6d^{1}\)
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moji listed the solids in order of hardness as graphite < chalk < quart…
C. Moji might have thought that crumbliness was a sign of softness.
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water can form large dewdrops in nature. how would droplets made of veg…
C. Oil would form droplets, but only very tiny ones because its surface tension is lower than that of water.
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question 19 (1 point) which reaction is the everse\ of a condensation r…
C. hydrolysis
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which factor is most important to keep the same when comparing the hard…
D. The method of making a scratch on the material
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the reaction below is catalized by h₂so₄. ch₃cooh + ch₃ch₂oh ----> ch₃c…
B. hydrolysis
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mickey had three substances. he hit each of them with a hammer. a red s…
B. The white substance is ionic; D. The silver substance is a metal.
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when he carried out his experiment, nathan found that he had three smal…
D. No, because the area exposed to the surface will be different, changing the rate of boiling.
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which two correctly relate the attraction between the particles of a li…
C. Strong attractions mean the liquid boils at a higher temperature. D. Strong attractions mean the liquid melts at a higher temperature.
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question 17 (1 point) which type of organic reaction is shown below? ch…
A. addition
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water can form large dewdrops in nature. how would dewdrops made of sal…
B. If saltwater formed dewdrops, they would be smaller because saltwater's surface tension is lower than that of pure water.
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question 16 (1 point) use the following information to answer the next …
d) ethyl propanoate
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how does the strength of the forces that hold the basic particles of a …
D. Stronger forces between particles means the substance boils at a higher temperature.
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the surface tension of the alcohol propanol in air has a value of 23.70…
C. Propanol will have a lower boiling point than water because the forces between the molecules are smaller. D. Propanol will have a flatter meniscus than water because the forces…
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rupert had three substances. a brown substance was a liquid at room tem…
A. The brown substance is molecular, D. The blue substance is ionic
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mohammed observed that his water boiled much more quickly than his isop…
B. Mohammed could have mixed up the labels on the containers. C. The heating vessel or hot plate was not at the same temperature each time.
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carlos set up three full vials beside one another and added drops to se…
B. The air temperature varied when someone opened a window.
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how many molecules of stearic acid are needed to make one molecule of s…
3
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a sample of he gas (2.35 mol) occupies 57.9 l at 300.0 k and 1.00 atm. …
$81.6$ L
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unit test #2 page 1: 1 2 3 4 5 6 7 8 9 10 page 2: 11 12 13 14 15 16 17 …
A. addition
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which of the following is not typically used to predict outcomes in spo…
C. The team's color scheme
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carbon monoxide is a colorless, odorless, tasteless, __________, and hi…
A. Flammable
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test #2 1: 2 3 5 6 8 9 2: 12 13 15 16 e) condensation reaction question…
d) It is a type of condensation reaction.
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action balanced equation particle view (draw what you see in the white …
\(1N_2+3H_2 ightarrow 2NH_3\)
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this image shows corn oil being poured into water. lipids are mostly in…
Lipids are mostly insoluble in water due to their many non - polar chemical bonds.
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determine the number of each type of atom in these formulas: 1. hgco3 h…
1. \(Hg:1\), \(C:1\), \(O:3\) 2. \(Ca:9\), \(P:6\), \(O:24\) 3. \(N:4\), \(H:8\), \(C:2\) 4. \(Zn:4\), \(N:8\), \(O:24\) 5. \(Mg:1\), \(C:4\), \(H:6\), \(O:4\) 6. \(Cu:3\), \(S:3\…
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question 15 (1 point) use the following information to answer the next …
B. condensation reaction
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question 18 (1 point) use the following information to answer the next …
e) condensation reaction
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question 14 (1 point) two isomers of c4o2h8 are: ch3ch2c-o-ch3 and h-c-…
A. methyl propanoate and propyl methanoate
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question 17 (1 point) rubbing alcohol is a colourless alcohol that has …
E. Propan - 2 - ol
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which is the name and chemical formula of the compound below? - c - - c…
A. 2,2 - dimethylpentanoic acid; \(C_{5}H_{11}COOH\)
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question 16 (1 point) in a(n) ___i___reaction, a(n) ___ii___ combines w…
e) A
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question 12 (1 point) which is true of markovnikovs rule? a) it can be …
D. a and b are true.
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which of the following is one of the most common drawbacks of a gdi eng…
B. Buildup of carbon on the intake valves and runners
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question 15 (1 point) use the following information to answer the next …
d. HO - CH₂ - CH₂ - OH
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question 11 (1 point) use the following information to answer the next …
C. carboxylic acid
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question 14 (1 point) which reaction is the “reverse” of a condensation…
d) hydrolysis
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question 10 (1 point) the structure below is ________. h h h h | | | | …
A. butane
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question 13 (1 point) use the following information to answer the next …
E. methane
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on a sheet of paper, draw the lewis structure for the following compoun…
All the checkboxes (correct number of \(N\) and \(H\) atoms, \(N\) as the central atom, line (single bond) between \(N\) and all three \(H\) atoms, two dots (electrons) associated…
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28) which of the following atoms or ions does not have 8 valence electr…
C. \(S^{-}\)
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which of the following compounds are ionic compounds? check all of the …
\(CaCl_{2}\), \(MgO\), \(Na_{2}O\)
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question 12 (1 point) in the presence of uv light, the following reacti…
A. substitution
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in gdi engines, which of the following is the least risky way to remove…
B. Removing the intake manifold and using a crushed walnut shell blaster to blast away the carbon
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question 11 (1 point) use the following information to answer the next …
e) carboxylic acid
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question 10 (1 point) what is the shape of an alkyne molecule? a) bent …
B. linear
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the reduction catalyst in a catalytic converter helps to: a. reduce the…
A. Reduce the oxides of nitrogen molecules into their base compounds.
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question 8 (1 point) the iupac name of the following organic compound i…
B. 1, 2 - dichlorobenzene
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question 9 (1 point) use the following information to answer the next q…
e) pent - 2 - yne
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question 7 (1 point) which organic compound is unsaturated? o a) 4 - et…
E. 2 - methyl - 3 - ethylpentyne
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unit test #2 tdsb.elearningontario.ca page 1: 1 2 3 4 5 6 7 8 9 10 page…
A. \(C_nH_{2n}\)
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carbon monoxide is a colorless, odorless, tasteless, ____, and highly t…
A. Flammable
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question 7 (1 point) a structural diagram for 2 - butene shows the ch₃ …
A. cis - 2 - butene
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catalytic converters come in two types:____and____.a. reduction; carbon…
B. Oxidizing; reduction
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practice problems identify the reactants, the products and the coeffici…
1. Reactants: $Zn$, $HCl$; Products: $ZnCl_{2}$, $H_{2}$; Coefficients: $1$, $2$, $1$, $1$ 2. Reactants: $KClO_{3}$; Products: $KCl$, $O_{2}$; Coefficients: $2$, $2$, $3$ 3. React…
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question 6 (1 point) consider the following structure of a compound: th…
A. propene
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question 6 (1 point) use the following information to answer the next q…
A. hexane
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question 5 (1 point) a structural diagram for 2 - butene shows the ch₃ …
A. cis - 2 - butene
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question 3 (1 point) the iupac name of compound ( \text{ch}_3\text{c}(\…
A. 2 - methylbut - 2 - ene
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question 3 (1 point) structural isomers are compounds that have ______ …
A. the same different
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able to identify each of the following bonds as polar or nonpolar. n—o …
polar
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question 2 (1 point) the structure below is ________. h h h h | | | | h…
d) butane
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question 2 (1 point) which compound has one triple carbon bond? a) c₄h₆…
A. \(C_4H_6\)
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question 1 (1 point) the name of the compound shown below is______. a) …
d) cyclohexane
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3. what is the full electron configuration for oxygen? a. 1s²2p⁴ c. 1s²…
C. \(1s^{2}2s^{2}2p^{4}\)
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2. in the electron configuration 1s², the 1 represents the _______, the…
D. principal energy level, sublevel, number of electrons
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multiple - choice question 1. which \block\ is helium part of? b. p d. …
a. s
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the special shells the men call \shells on wheels\ are whizzing by cont…
chemical warfare
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the reduction catalyst in a catalytic converter helps to: a. reduce the…
A. Reduce the oxides of nitrogen molecules into their base compounds.
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the ideal gas law describes the relationship among the pressure, volume…
B. \(V=\frac{nRT}{P}\), C. \(n=\frac{PV}{RT}\), D. \(R=\frac{PV}{nT}\), E. \(T=\frac{PV}{nR}\)