Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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for each food listed below, choose whether it has all single carbon - t…
Peanut butter: At least one double carbon - to - carbon bond Sunflower oil: At least one double carbon - to - carbon bond Cheddar cheese: All single carbon - to - carbon bonds
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pq - 30. a molecular compound is found to consist of 30.4% nitrogen and…
B. $92\ g\cdot mol^{-1}$
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physical vs. chemical change quick check which of the following happens…
Atoms of one or more substances rearrange into a new substance.
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what happens when you fry an egg? a) proteins from the yolk are transfe…
c) Denatured proteins form new interactions
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xenon tetrafluoride gas is placed in a 3 liter container at 80°c. the p…
0.0121 mol
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what is the volume of the container needed to store 0.8 moles of argon …
6.19 liters
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14. the molecule that has a molecular shape of trigonal pyramidal is _ …
PH₃; the central atom has a lone pair
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13. in the compound ch₃oh the shape around the c atom is ⅰ and the shap…
tetrahedral, bent
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13. in the compound ch3oh the shape around the c atom is _i_ and the sh…
tetrahedral, bent
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12. when its electron dot diagram is drawn, which molecule below appear…
BH₃
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use the following information to answer the next question boiling point…
London Dispersion, fewer
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9. a student described a structural diagram of a molecule as follows. 1…
The diagram where the central atom has 4 single bonds to outer atoms (the second diagram from the top in the provided image)
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8. the electron dot diagram for a molecule of nitrogen, n₂(g) would con…
A triple bond because each nitrogen has 3 bonding electrons to share.
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13. to be eluctant\ (line 7) is to be determined foolhardy unwilling ca…
13. C. unwilling 14. C. personification
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13. to be eluctant\ (line 7) is to be determined foolhardy unwilling ca…
13. C. unwilling 14. C. personification
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19. complete the following how many valence electrons does bromine have…
7151
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11. peoples trust in scientific accomplishment is best demonstrated by …
11. "Darkness has come / but technology will triumph" (lines 42 - 43) 12. optimism
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use the following information to answer the next question. a list of mo…
3124
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use the following information to answer the next question. statements a…
1247
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11. peoples trust in scientific accomplishment is best demonstrated by …
11. "Darkness has come / but technology will triumph" (lines 42 - 43) 12. courage
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20. fill in the blanks with the corresponding numbers, for a nitrogen a…
7313
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19. complete the following how many valence electrons does bromine have…
7251
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use the following information to answer the next question. a list of mo…
3124
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20. fill in the blanks with the corresponding numbers, for a nitrogen a…
7313
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use the following information to answer the next question the following…
1236
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use the following information to answer the next question. the followin…
1236
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14. the molecule that has a molecular shape of trigonal pyramidal is _ …
$PH_3$, the central atom has a lone pair
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13. in the compound ch3oh the shape around the c atom is _i_ and the sh…
tetrahedral, bent
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question 6 1.75 pts co2 is ____. a base molecule an acidic molecule lip…
an acidic molecule
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21. complete the following table (9 marks) when you write and draw out …
| Compound | Lewis Dot Diagram | Structural Diagram | VSEPR (shape) name | | ---- | ---- | ---- | ---- | | $SBr_2$ | Sulfur with 2 bonding pairs to bromines and 2 lone pairs | Ben…
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2. which of the following molecules would have the most polar bond? br …
H-O
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1. which type of intermolecular force is present between any molecules?…
London - dispersion force
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cuando el metano se quema, se combina con oxígeno para formar dióxido d…
D. Cuando se consume una unidad de metano, se produce una unidad de dióxido de carbono
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30. what is the energy conversion that happens in this process in a coa…
chemical to thermal
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27. what is the energy conversion that happens in a ceiling fan? 1 poin…
27. electrical to mechanical 28. chemical to mechanical
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25. the sun is powered by ___ energy (fusion reactions). 1 point mechan…
radiant
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17. electricity is ____ travelling through wires. protons neutrons elec…
17. C. electrons 18. D. nuclear
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16. atoms vibrating in place is ___ energy. 1 point mechanical radiant …
thermal
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nom de lélément :
Azote
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d. aluminium notation chimique : numéro atomique : nombre de masse : # …
Aluminium : Notation chimique : Al Numéro atomique : 13 Nombre de masse : 27 # de protons : 13 # d'électrons : 13 # de neutrons : 14 Magnésium : Notation chimique : Mg Numéro atom…
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exercices - le modèle de bohr - rutherford 1. dessinez le modèle de boh…
# Explications étape par étape: ## Étape 1: Trouver les informations pour le potassium - La notation chimique du potassium est K. - Son numéro atomique est 19. - Le nombre de mass…
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exercices sur latome 1. compléte le tableau ci - dessous : élément nota…
| Élément | Notation chimique | Numéro atomique | Nombre de masse | Nombre de protons | Nombre de neutrons | Nombre d'électrons | | ---- | ---- | ---- | ---- | ---- | ---- | ---- …
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true or false: functional groups are sets of atoms that are ionically b…
False
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6. which of the following is a key consideration when designing housing…
6. A. It should have proper ventilation 7. C. Housing for animals should provide a cozy environment with air - conditioning 8. D. Poultry houses should be located in residential a…
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6. which of the following is a key consideration when designing housing…
6. D. safety with air - conditioning equipment 7. B. Overcrowding can lead to a balanced diet 8. D. Poultry houses should be located in residential areas for easier market access …
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which product, according to fda labeling, is raw, unprocessed, contains…
A. fresh tomatoes
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question 14 electrically charged atoms or combinations of atoms are cal…
ions
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question 13 use the figure above to answer the following question(s). w…
acid rain ### Question 14
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question 9 river water held behind a dam is a form of ______. o kinetic…
C. potential energy
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question 8 use the figure above to answer the following question(s). st…
is roughly 10,000 times more acidic than normal rainwater
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question 4 when you burn a log in your fireplace, you are converting _.…
chemical energy to thermal (heat) energy
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question 3 ____ is defined as the number of protons plus the number of …
E. Mass number
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question 1 a(n) ____ is the smallest component of an element that still…
A. atom
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under certain conditions the rate of the reaction is zero - order in ni…
$2.98\ mol$
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question 43 endorphins are _________. radically different in function f…
pain - controlling chemicals
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optimization problems scenario a: fruit smoothie to make their deliciou…
The objective function is $C = 40x + 50y$ subject to the constraints $x\leq8$, $y\leq 10$, $y\geq2x$, $x\geq0$, $y\geq0$.
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optimization problems scenario 4: fruit smoothie to make their deliciou…
Objective function: $C = 40x + 40y$ Constraints: $x\leq8$, $y\leq10$, $y\geq2x$, $x\geq0,y\geq0$
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multiple - choice question cations have a _______________ radius than t…
smaller
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what is the label for the orbital shown here that indicates the type of…
$d_{xy}$
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use the ph chart to determine the possible contents of each test tube s…
Biuret solution.
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question 19 (1.5 points) saved when salt (nacl) dissolves in water, the…
C. electrostatic interaction; solution
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question 18 (1.5 points) saved two atoms each have the same number of n…
B. different elements entirely
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a student carefully pours water down a string from a cup on the counter…
A. adhesion and cohesion, D. capillary action
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which part of the glucose molecule below determines its biochemical beh…
A
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all of the following are characteristics of phosphate functional groups…
they are not good buffers because they are unable to accept or donate H+ ions in solution
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question 10 (1.5 points) saved an atoms reactivity with other atoms dep…
valence electrons
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in the water molecule (h2o) how many of its own electrons does the oxyg…
1
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question 8 (1.5 points) saved which of the following is correctly ranke…
B. lemon juice - blood - inside of small intestine
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fill in the blank question nuclear reactions produce more energy per un…
chemical
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fill in the blank question nuclear reactions produce more energy per un…
chemical
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multiple - choice question what noble gas would be used for the noble g…
A. neon
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what family number(s) is/are the noble gases. there may be more than on…
A. 18 D. VIIIA
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12. use the steady state approximation to derive a rate law for the fol…
The derived rate law is $r=\frac{k_1k_2[O_3]^2}{k_{ - 1}[O_2]+k_2[O_3]}$. When $k_{ - 1}[O_2]\gg k_2[O_3]$, the observed rate law $r = k\frac{[O_3]^2}{[O_2]}$ can be obtained, whi…
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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physical vs. chemical change quick check which of the following example…
recharging batteries
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the passage below describes a process of scientific inquiry. select the…
He concluded that the temperature of the water does indeed affect the solubility of salt.
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question 9 1 pts all of the following is true of exergonic reactions ex…
B. stores energy in chemical bonds
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9. justify why the number of valence electrons stays the same within a …
Valence - electrons are the electrons in the outermost energy level of an atom. Elements in the same group have the same number of valence - electrons because as you move down a g…
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which is not true of energy: energy is created by plants and destroyed …
energy is created by plants and destroyed by consumers
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9. justify why the number of valence electrons stays the same within a …
In a group of the periodic - table, elements have the same outer - shell electron configuration. The principal quantum number \(n\) of the outermost shell (valence shell) increase…
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the passage below describes a process of scientific inquiry. select the…
He concluded that a thicker layer of oil does indeed reduce water evaporation more effectively than a thin layer.
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the passage below describes a process of scientific inquiry. select the…
He found that the rock candy made with white sugar had larger crystals than those made with pure cane sugar.
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which of these groups is characteristic of thiols?
E. Option with sulfhydryl group (assuming the group labeled E in the image contains the -SH group)
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dr. jekyll and mr. hyde: theme how does this excerpt best develop the t…
Chemicals and the doctor's clothes are found with Hyde.
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drag and drop the words or phrases that accurately complete the paragra…
1. be transformed 2. motion 3. thermal 4. transformed
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which of the following are examples of chemical or nuclear energy? soun…
- B. nuclear fission occurring in a reactor - C. a substance changing into a complete other substance - E. chemical reaction occurring when two substances combine
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the human body stores chemical energy from digested food. some of the c…
C. Digested food is a source of potential energy.
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which change is an example of transforming potential energy to kinetic …
None of the above options are examples of transforming potential energy to kinetic energy.
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energy can be transformed from one form to another. the diagram shows o…
nuclear to thermal and radiant
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what are the two main types of energy? radiant and chemical thermal and…
kinetic and potential
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11 multiple choice 0.3 points calculate 7.8213 + 0.020 ÷ 4.125 and repo…
7.83
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29 multiple choice 0.3 points which is not a pure substance? copper sul…
C. tomato soup
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28 multiple choice 0.3 points a property that depends on the amount of …
A. Extensive
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27 multiple choice 0.3 points which of the following is a chemical prop…
It can react with chlorine gas to form platinum(IV) chloride.
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24 multiple choice 0.3 points which of the following is a pure substanc…
Chlorine, $Cl_2$, gas
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23 multiple choice 0.3 points chunky chicken soup is an example of a(n)…
B. heterogeneous mixture
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19 multiple choice 0.3 points which of the following is a mixture? wate…
Ice Tea
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dr. jekyll and mr. hyde, chapters 7 and 8 \quite so, sir,\ returned poo…
The theme of the duality of human nature and the fear of the unknown.