Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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methods of expressing concentration of a solution g. normality (n) find…
- 0.15 M HCl: 0.15 N - 1.4 M H₂SO₄: 2.8 N - 2 M NaOH: 2 N - 0.4 M Ba(OH)₂: 0.8 N
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1 multiple choice 1 point which of the following best describes a hydro…
1. Water is used to break a bond 2. An amino acid
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which of the following correctly pairs the substance with its ph range?…
1. D. Stomach acid - pH 1 - 2 2. D. Ionic bonds
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q2(in class quiz) 1 multiple choice 1 point which of the following best…
Water is used to break a bond
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imagine you work at the front desk of a local clinic. you arrive early …
A. Look up the storage information for the chemical in the products' MSDS.
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maggie works in a hospital and came into contact with some chemicals th…
B. No, Maggie's supervisor is legally not allowed to have any conversations with Maggie's doctor.
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hormones are chemicals secreted and regulated by the endocrine system. …
T
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7. alicias cheapskate boyfriend gave her a ring he claims is 24 carat g…
For the ring problem: Volume of ring: 1.5 mL Density of ring: approximately 10.19 g/mL. She should throw it at him as the density is much lower than that of 24 - carat gold. For t…
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the plot in the tb - plane shows the brewing time, b, defined as the ti…
B. \(B = 9\cdot0.96^{T}\)
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the biogeochemical cycles the water cycle 1. what are the major reservo…
1. Oceans, ice caps and glaciers, groundwater, surface water (lakes, rivers), atmosphere. 2. In arid regions, lack of precipitation; human - induced disruptions. 3. Reforestation,…
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physical property 1. observed with senses 2. determined without destroy…
The answers in the image are correct as per the definitions of physical and chemical properties and changes. For the first part: 1. P 2. P 3. C 4. P 5. C 6. C 7. P 8. P 9. C 10. P…
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the rate of a certain reaction is given by the following rate law: rate…
k = 271.4 $M^{-3}s^{-1}$ If $N_2$ concentration is doubled, rate changes by a factor of 8 Overall reaction order: 4 Reaction order in $O_3$: 1 Reaction order in $N_2$: 3
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food color is dropped into water to give it color. chewing food to brea…
1. F 2. F 3. T 4. T 5. F 6. F 7. T 8. F 9. F 10. F
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consider the following 3 sets of protons and electrons. which set has t…
C
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part b read each scenario. decide whether a physical or chemical change…
1. Physical change; No new substances formed. 2. Chemical change; New substances (charred bread, smoke) formed. 3. Chemical change; Rust (new substance) formed. 4. Physical change…
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part a physical and chemical changes can you recognize the chemical and…
1. P 2. C 3. C 4. P 5. C 6. C 7. P 8. P 9. C 10. P
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physical change 1. a change in size, shape, or state 2. no new substanc…
1. P 2. C 3. P 4. P 5. C 6. C 7. P 8. P 9. C 10. P 11. C 12. C 13. C 14. P 15. C 16. P
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name key physical property 1. observed with senses 2. determined withou…
1. P 2. P 3. C 4. P 5. C 6. C 7. P 8. P 9. C 10. P 11. P 12. P 13. P 14. C
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3. an unknown compound, believed to be a hydrocarbon, showed the follow…
The compound is the benzene ring (the third structure in the given list)
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2. a student has two compounds in two separate bottles but with no labe…
a. Octane: Insoluble; 1 - Hexene: Insoluble b. Octane: Soluble; 1 - Hexene: Soluble c. Octane: Burns with a clean flame; 1 - Hexene: Burns with a smokier flame d. Octane: Less den…
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d. + kmno₄ (aq) →
No reaction occurs.
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11) complete the following table to describe three states of matter. th…
| | Solid | Liquid | Gas | |--|--|--|--| | Shape | Fixed | Not fixed, takes the shape of the container | Not fixed, fills the container | | Volume | Fixed volume | Fixed volume | …
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33. a volume of 5.00 ml of mercury is added to a beaker that has a mass…
$155.3\ g$ ### 40.
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please fill in the missing information with regards to the description …
| Description | Noble Gas Core Electron Configuration of the Neutral Atom | Chemical Symbol of the Metal | Name of the Metal | |--|--|--|--| | A metal ion with a net charge of + 4…
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name: date: per: chemistry lab equipment crossword across 2 a long non …
(As the actual crossword filling requires visual interaction and cannot be fully presented in text - only format here, it's best to solve it on the actual paper. But here are some…
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for the group of four atoms or ions provided below, please select the s…
As³⁻, Se²⁻, Br⁻, Kr
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1. below are four organic compounds. the reagent shown is added to the …
a. Product: $CH_3CHBrCH_2Br$, Observation: Red - brown color of $Br_2$ disappears b. Product: Cyclohexane - 1,2 - diol, Observation: Purple color of $KMnO_4$ fades c. Product: $CH…
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write the ground - state electron configurations of the following trans…
Part 1 of 4: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{5}$ Part 2 of 4: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}$ Part 3 of 4: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{7}$
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write the ground - state electron configuration for the following ion, …
$1s^{2}2s^{2}2p^{6}$
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please fill in the missing information with regards to the description …
Noble Gas Core Electron Configuration of the Neutral Atom: $[Ar]3d^{5}4s^{2}$; Chemical Symbol of the Metal: Mn; Name of the Metal: Manganese
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a m²⁺ ion has two electrons in the 3d subshell and is derived from a me…
Cr
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which group of the periodic table is the following element found in? ne…
Group 14
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which of the following electron configurations represents an element wi…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}$
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for the electronic configuration given, choose the electronic configura…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$
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chemical changes anthony is performing an experiment. he adds 0.25 gram…
5.25 grams
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a science teacher demonstrated physical and chemical changes by using a…
- The marshmallow changes shape: Physical (P) - The wick turns black: Chemical (C) - The marshmallow burns: Chemical (C) - The candle releases smoke: Chemical (C) - The fork is ho…
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a science teacher demonstrated physical and chemical changes by using a…
the marshmallow changes shape: P the wick turns black: C the marshmallow burns: C the candle releases smoke: C the fork is hot: P the wax melts: P
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write the ground - state electron configurations of the following trans…
Part 1 of 4: $Pd^{2+}$ has ground - state electron configuration $[Kr]4d^{8}$ Part 2 of 4: $Sc^{3+}$ has ground - state electron configuration $[Ar]$
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what does an abrupt change from blue to yellowish - green in bromothymo…
increased CO₂ levels
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which group of the periodic table is the following element found in? ar…
Group 4
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which of the following best describes the relationship between co₂ prod…
$CO_2$ production results in a yellowish - green color.
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what role did the resting rate play in the bromothymol blue experiment?…
a control
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assignment multiple - choice question what is called when a solid chang…
sublimation
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what type of assessment does the observable color change in the bromoth…
B. qualitative
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12 which of these describes effusion? a gas that closely follows kineti…
12. The movement of gas particles through a small hole 13. Force applied per unit area 14. Solid
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multiple - choice question what is a melting_point? the temperature at …
the temperature at which a solid becomes a liquid
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what product can bemeasured with bromothymol blue? h₂o h₂o₂ co₂ o₂
C. $CO_2$
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multiple - choice question what happens after the bonds are broken due …
the molecules can flow past each other and liquid water forms
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how does bromothymol blue serve as an indicator in the experiment? it m…
It measures the rate of CO₂ production.
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what role did the resting rate play in the bromothymol blue experiment?…
C. a control
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multiple - choice question the water molecules in ice are bonded tightl…
B. crystal lattice and the molecules vibrate
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what color does bromothymol blue change to in the presence of co₂? oran…
orangish - yellow
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highlight the main group metals in the periodic table below.
Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Al, Ga, In, Tl
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assignment multiple - choice question is water and ice made of the same…
yes both contain the same water molecules
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assignment multiple - choice question which is correct? the solid form …
the solid form of water is ICE
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when an atom or molecule gains one or more electrons, it is said to be:…
A. reduced
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13. what is the difference between cohesion and adhesion? cohesion is _…
Cohesion is the attraction between molecules of the same substance. Adhesion is the attraction between molecules of different substances.
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a calorie is the commonly used unit of chemical energy. it is also the …
D. heat
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5) a flask that weighs 343.8 g is filled with 225 ml of carbon tetrachl…
5) $ ho\approx1.581\ g/mL$ 6) $ ho\approx1.84\ g/mL$ 7) $m = 219.125\ g$ 8) $ ho\approx11.3\ g/cm^{3}$ 9) $ ho\approx7.92\ g/mL$ 10) $V\approx238.1\ cm^{3}$
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if you were able to increase the kinetic energy of the molecules inside…
It would increase
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1.) how many significant digits are in the measurement 0.005030 g? (1 p…
B. 4
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the textile industry manufactures fabric. the industrys production meth…
C. hazardous
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1) a block of aluminum occupies a volume of 15.0 ml and weighs 40.5 g. …
1. $2.7\ g/mL$ 2. $13.6\ g/mL$ 3. $157.8\ g$ 4. $\approx8.92\ g/cm^{3}$
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how to calculate volume of concentrated solution needed to prepare a di…
$5.0\ mL$
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1) how many milliliters of the approximately 0.11 m prepared copper(ii)…
$10.00$
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energetically favorable reactions rank these reactions from least to mo…
1. Glucose to Glucose - 6 - P 2. Glucose - 6 - P to Fructose - 6 - P 3. ATP to ADP and Pi 4. PEP to pyruvate
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15) how do non - metal elements become more stable and form compounds? …
15. sharing valence electrons 16. transferring inner energy level electrons to an outer level to form stable bonds
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2. types of environment 3. ocean currents ch.- 16 state government ♦ fi…
1. **Fill - in - the blanks**: - 28; 8 - Central or Union Government - 25 - Question Hour - Governor 2. **One - word answers**: - Member of Legislative Assembly - 30 - 6 years - A…
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13) which electron configuration is of an unreactive element? ne3s2 xe6…
13. [Kr]5s2 4d10 5p6 14. hydrogen
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30 multiple choice 2 points which of the following types of hydrocarbon…
C. alkanes
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match the word to the correct definition. then write one sentence using…
1. Definition: A chemical bond formed by the transfer of electrons between atoms, creating ions that attract each other. Sentence: Sodium and chlorine form an ionic bond to create…
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10) which noble gas does not follow the octet rule? argon helium krypto…
10. B. Helium 11. D. 8
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the image shows a building with large plexiglass windows and a lewis st…
carbon = trigonal planar, oxygen = bent
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29 multiple choice 2 points which of the statements below accurately de…
A. Alkanes are the simplest and least reactive class of organic compounds., D. Alkanes are hydrocarbons which contain only single bonds.
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scientific inquiry. select the part of the passage that describes testi…
She prepared a saline solution by mixing salt into water. She then poured equal amounts of the solution into four separate cups. Next, she placed an iron nail in two of the cups a…
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the image shows polyurethane insulation being sprayed into a wall cavit…
120°
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multiple choice 2 points identify the correct iupac name for the struct…
B. 1 - bromo - 4 - tert - butyl - 5 - chlorocycloheptane
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8) how many valence electrons do the alkaline earth metals have? 2 4 6 …
8) 2 9) arsenic
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the image shows a space satellite and the lewis structure of the monopr…
trigonal pyramidal
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catalytic cracking is the reaction process through which long - chain a…
A. True
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the image shows a disassembled smartphone and the lewis structure of th…
trigonal planar
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cis - trans isomers not isomers structural isomers conformational isome…
D. conformational isomers
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the image shows a lewis structure for an octane component of gasoline, …
- 109°
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6) how many valence electrons would be shown in the electron diagram of…
6) B. 3 7) B. It stays the same
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multiple choice 2 points a series of compounds, like the n - alkanes, t…
D. homologous
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the image shows a skeletal structure for a nanometer - sized molecular …
-109°
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4) an atom of a certain element has the electron configuration of ar4s2…
4) A. 7 5) B. Br
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the image shows a lewis structure for a dimethylhydrazine, and a space …
A - 109° and B - 109°
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24 multiple choice 2 points provide an acceptable iupac name for the al…
C. 2,5 - dimethylheptane
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11 the work of robert boyle paved the way for scientists to work on che…
True
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the image shows a lewis structure for vinyl chloride, which is used to …
trigonal planar
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23 multiple choice 2 points which of the following correctly lists the …
chair < twist boat < boat < half - chair, so the correct option is the third one: chair < twist boat < half - chair < boat.
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5) what is the element described in question #4? cl br se zn 6) how man…
6) 3
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the image shows an exotic automobile made with extensive use of carbon …
carbon 1 = trigonal planar, carbon 2 = linear
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kate is a student in the lab and needs to measure the amount of water i…
This measurement contains uncertainty. The 8 in 44.8 is the uncertain digit.
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which line angle drawing best represents the newman projection shown be…
The correct line - angle drawing needs to be determined by analyzing the groups attached to the two - carbon bond in the Newman projection. In the given Newman projection, one car…
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the image shows a power plant and a lewis structure of the chemical eth…
(I) tetrahedral electron domain geometry, (II) bent molecular geometry
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3) which of the following statements are not true about electron dot di…
3. They include all electrons in an atom 4. 7
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multiple choice 2 points which of the following cycloalkanes exhibits t…
A. cyclooctane
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3) which of the following statements are not true about electron dot di…
3) They include all electrons in an atom 4) 7