Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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which of the following reactions are double replacement reactions? o na…
\(NaOH + HCl ightarrow HOH + NaCl\)
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which of the following reactions are single replacement reactions? ca +…
$K + AgCl ightarrow Ag + KCl$, $Na + HCl ightarrow H_2+NaCl$
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in all combustion reactions the water (h2o) and carbon dioxide (co2) ar…
Water ($H_2O$) and carbon dioxide ($CO_2$) are products; hydrocarbon and oxygen ($O_2$) are reactants.
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which of the following reactions are decomposition reactions? □ naoh + …
$\mathrm{NaCl} ightarrow\mathrm{Na}+\mathrm{Cl}_{2}$, $\mathrm{H}_{2}\mathrm{O} ightarrow\mathrm{H}_{2}+\mathrm{O}_{2}$
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which of the following reactions are synthesis reactions? □ k + cl₂ → k…
\(K + Cl_2 ightarrow KCl\), \(H_2+O_2 ightarrow H_2O\)
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match the following reactions to the correct description. combustion sy…
$CH_4 + 2O_2 ightarrow CO_2+2H_2O$ - combustion $HCl + NaOH ightarrow NaCl + H_2O$ - double replacement $Mg + CuSO_4 ightarrow MgSO_4+Cu$ - single replacement $2H_2O ightarrow 2H_…
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which of the following reactions are combustion reactions? o naoh + hcl…
$\mathrm{C_{5}H_{12}+O_{2}\to H_{2}O + CO_{2}}$
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unit test unit test complete 21 read the poem “roses,” by george eliot.…
"Night" uses a rhyme scheme.
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particle diagram classification label the particle diagrams as a mixtur…
1. Mixture of elements 2. Mixture of elements and compounds 3. Mixture of elements 4. Mixture of elements 5. Mixture of compounds 6. Mixture of compounds 7. Mixture of elements an…
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which sentence contains parallel structure? mekhi was finally finished …
Mekhi finished his chemistry homework and then finished his essay.
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why is radioactive dating important when approximating the age of earth…
Scientists can determine the order of when rocks formed on Earth.
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use the energy diagram below to fill in the blanks: the energy of the r…
The energy of the reactants is $10$ kJ and the energy of the products is $20$ kJ. We know that the reaction represented by this energy diagram is endothermic because the energy of…
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swyk: energy & chemical reactions 3 of 4 possible points 6 fill the the…
The energy of the reactants is \(40\) (in kJ) and the energy of the products is \(20\) (in kJ). This means that the heat of reaction or \(\Delta H\) is \(-20\) (in kJ). Because of…
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label the particle diagrams as an element or compound.
1. Element 2. Element 3. Compound 4. Element 5. Compound 6. Element 7. Compound 8. Element 9. Element
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the following shows the difference between a reaction with a catalyst (…
Having a catalyst present decreases the activation energy of a reaction.
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match the statements with graph a or b. has an activation energy. has a…
Has an activation energy: A, B Has a $+\Delta H$: B Has a $-\Delta H$: A Exothermic: A Endothermic: B
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part d dinitrogen pentoxide express your answer as a chemical formula. …
$N_2O_5$
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what is the heat of reaction or δh in this energy diagram (in kj)? reac…
-20
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carbon disulfide express your answer as a chemical formula. a chemical …
Carbon disulfide: $CS_2$ Tetraphosphorus hexoxide: $P_4O_6$
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3 bellringer: abundance of isotopes 2526 what is the average atomic mas…
$210.28$ amu
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try it: energy of reactions the energy diagram on the right is an examp…
Exothermic
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try it: energy of reactions the energy diagram on the right is an examp…
Left diagram: A. Exothermic Right diagram: B. Endothermic
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sulfur dibromide express your answer as a chemical formula. a chemical …
Part A: $SBr_2$ Part B: $CS_2$
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which energy diagram represents a chemical reaction with lower activati…
Graph A
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try it: energy of reactions which of the following represents the energ…
A. A
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try it: energy of reactions which of the following represents the energ…
D
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part d n₂o₅ spell out the full name of the compound. part e n₂o₄ spell …
Part D: Dinitrogen pentoxide Part E: Dinitrogen tetroxide
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try it: energy of reactions in exothermic reactions, the heat of the re…
A. Negative
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what is the energy of the products in this energy diagram (in kj)? reac…
40
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2 bellringer: atomic numbers, masses, ions and isotopes what is the ato…
190.23
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2 bellringer: atomic numbers, masses, what is the atomic mass of this e…
190.23
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part a n2o spell out the full name of the compound. part b no spell out…
Part A: Dinitrogen monoxide Part B: Nitrogen monoxide Part C: Nitrogen dioxide
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try it: energy of reactions what role do catalysts play in chemical rea…
They decrease the activation energy
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try it: energy of reactions the left diagram on the right is an example…
Endothermic Reaction
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predict whether each of the following compounds is molecular or ionic. …
Molecular: $\text{N}_4\text{O}$, $\text{ONF}_3$, $\text{B}_2\text{H}_6$, $\text{CH}_3\text{OH}$ Ionic: $\text{MgCrO}_4$, $\text{Ti}_2\text{S}_3$, $\text{Ag}_2\text{SO}_4$, $\text{…
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what is the energy of the reactants in this energy diagram (in kj)? rea…
60
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in endothermic reactions, the heat of the reaction or $delta h$ is... p…
Positive
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write chemical formula for lithium carbonate. express your answer as a …
$Li_2CO_3$
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what is the activation energy in this energy diagram (in kj)? 120 100 8…
60 kJ
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try it: energy of reactions which of the following represents the heat …
E
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try it: energy of reactions which of the following represents the activ…
B
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which of the following represents the energy of the activated complex/ …
C
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write chemical formula for carbonic acid. express your answer as a chem…
Part A: $H_2CO_3$ Part B: $LiOH$
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part e hclo₄ spell out the full name of the compound. submit request an…
Part E: Perchloric acid Part F: Acetic acid
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reactivity 1. arrange the following element sets from most to least rea…
to question 9: Hydrogen is not included with Group 1 metals because although it has 1 valence electron like Group 1 metals, it is a non - metal under normal conditions. It does no…
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nitrous acid express your answer as a chemical formula. □a chemical rea…
For nitrous acid: $HNO_2$ For $H_2CO_3$: carbonic acid
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u2. water 1. sketch a ball and stick diagram of a water molecule. label…
Draw a larger ball to represent the oxygen atom and two smaller balls to represent the hydrogen atoms. Connect the oxygen atom to each hydrogen atom with a stick to represent the …
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hydroiodic acid. express your answer as a chemical formula. a chemical …
Part A: HI Part B: HClO₃
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a solution is 6% (w/v). which of the following is the ratio strength (w…
4. 1:16.7
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approved eye protection devices (such as goggles) are worn in the labor…
Any time chemicals, heat, or glassware are used
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definition: a chart that organizes all known elements into a grid of ho…
D. by physical and chemical properties
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definition: a pure substance that cannot be broken down into simpler su…
A. copper B. gold C. helium
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hypochlorous acid express your answer as a chemical formula. a chemical…
HClO
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give the name or chemical formula, as appropriate, for each of the foll…
Hypochlorous acid formula: $HClO$ Iodic acid formula: $HIO_{3}$
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choose the best answers. 3. if the reactants of a chemical equation are…
D. There will be two atoms of chlorine in the products.
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practice lesson 2: changes in matter complete the following three exerc…
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. For example, when hydrogen gas burns in oxygen gas to form water, the tot…
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law of conservation of mass definition: states that mass is neither cre…
equal
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6. what does the rhyme scheme reveal about the speaker? a. the rhyme sc…
C. The end rhyme scheme is simple and mostly involves words rhyming with Annabel "Lee"; this suggests that the speaker is still very focused on his relationship with Annabel, and …
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answer the questions. . rows on the periodic table are called _. column…
1. periods 2. groups; families 3. 7 4. 18 5. 2; 1 6. Chlorine (Cl) 7. increasing atomic number 8. Solid 9. Metal 10. similar chemical properties 11. - Sodium: Na; 11; 22.99; 11; 1…
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choose the best answers. which examples describe chemical changes? a bo…
B. burning C. decomposition
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1. compound or element? magnesium sulfate mgso₄ compound green element …
1. compound green 2. glucose blue 3. element red 4. 3 yellow 5. 3 orange 6. neon purple 7. compound blue 8. 1 red 9. 4 yellow 10. element purple
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choose the best answer. which example describes a physical change? a co…
A. condensation
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give the name or chemical formula, as appropriate, for each of the foll…
Part A. bromic acid Part B. hydrobromic acid Part C. phosphoric acid
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many familiar substances have common, unsystematic names. for each of t…
Part D: Hydrochloric acid Part E: Magnesium sulfate Part F: Magnesium hydroxide
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write how many protons, neutrons, and electrons are in the atom. then, …
1. $P = 6$, $N = 6$, $E = 6$ 2. $P = 5$, $N = 6$, $E = 5$ 3. $P = 10$, $N = 10$, $E = 10$ 4. $P = 1$, $N = 0$, $E = 1$ 5. $P = 3$, $N = 4$, $E = 3$ 6. $P = 4$, $N = 5$, $E = 4$ 7.…
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many familiar substances have common, unsystematic names. for each of t…
Part A: potassium nitrate Part B: sodium carbonate Part C: calcium oxide
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use the periodic table to find the numbers of protons, neutrons, and el…
| Name of Element | Element Symbol | Mass Number | Atomic Number | Protons | Neutrons | Electrons | |---|---|---|---|---|---|---| | Boron | B | 11 | 5 | 5 | 6 | 5 | | Sodium | Na …
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enter the chemical formula for sodium hypobromite. express your answer …
$NaBrO$
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enter the chemical formula for sodium hypobromite. express your answer …
$NaBrO$
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enter the chemical formula for iron(iii) carbonate. express your answer…
$Fe_{2}(CO_{3})_{3}$
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reading atoms practice. using the image of the atom, fill in the inform…
4. positive 5. no (neutral) 6. negative 7. nucleus 8. nucleus 9. electron - cloud; outside 10. Protons; neutrons 11. protons 12. Electrons; protons; neutrons 13. sub - atomic part…
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how many carbons are in the structure below? a) 6 b) 8 c) 5 d) 7 e) 9
A. 6
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if a graph of data similar to part 2 in this lab produced the following…
161.4 °C
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question 6 (2 points) listen in this lab, you will work with a computat…
B. Electronic Potential Range C. Electronic Energy (a.u.) D. Dipole Moment (Debye)
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question 5 (1 point) listen dipole - dipole interactions typically are …
d) dipole - dipole interactions involve only partial charges caused by an unequal sharing of electrons by atoms forming a bond.
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what is the branch of science involving interactions and changes in mat…
C. Chemistry
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which representation best shows the formation of an instantaneous dipol…
A. a)
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question 3 (1 point) listen the strongest intermolecular forces present…
B. London dispersion forces
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question 2 (1 point) which of the following molecular properties does n…
Strength of covalent bond
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all of the following structures have 6 carbons and 14 hydrogens, which …
E. 2,3 - dimethyl - butane
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14. using your work from #13, explain why the equivalence point is the …
For question 14: The equivalence point is the same because the stoichiometric amounts of reactants determine it, but the pH is different due to the different hydrolysis behaviors …
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part e fe₂(co₃)₃ spell out the full name of the compound. submit previo…
Part E: Iron(III) carbonate Part F: Chromium(III) nitrate
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federal law requires that commercial chemicals do not pose health risks…
T
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the formula for the ph of a solution of hydronium ions is given by the …
$4$
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part e - diagnoses and treatments for cancer what methods are being use…
C. Chemotherapy might cause long - term harm to the reproductive system and other body systems D. A common approach for treating cancer is to remove the tumor and the adjacent tis…
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part e - diagnoses and treatments for cancer what methods are being use…
- Conventional X rays are a painless, noninvasive procedure that can accurately disclose a tumor's shape and location. - Chemotherapy might cause long - term harm to the reproduct…
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element example: oxygen define: compound example: table salt define: mi…
Element - A pure substance made of one - kind of atom. Compound - A pure substance formed by chemical combination of different elements. Mixture - A combination of substances not …
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name: name redacted date: date redacted mod: 4 element example: oxygen …
Element: A pure substance made of only one type of atom. Example: Oxygen. Compound: A pure substance made of two or more different types of atoms chemically combined in a fixed ra…
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practice: summary chart refer back to your notes and complete the table…
| | SOLIDS | LIQUIDS | GASES | |--|--|--|--| | Volume | Definite | Definite | Indefinite | | Shape | Definite | Takes container shape | Indefinite | | KE | Low | Moderate | High |…
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give the name of this ionic compound. al₂(cr₂o7)₃
Aluminum dichromate
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question 10) why do scientists use multiple tests to determine the char…
Scientists use multiple tests to determine the characteristics of an unknown compound because each individual test provides only partial information. Multiple tests can cross - ve…
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give the name of this ionic compound ba₃(po₄)₂
Barium phosphate
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give the name of this ionic compound. (nh₄)₂cro₄
Ammonium chromate
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give the name of this ionic compound. ga(cn)₃
Gallium(III) cyanide
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give the name of this ionic compound k₃po₄
Potassium phosphate
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give the name of this ionic compound al₂(so₃)₃
Aluminum sulfite
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give the name of this ionic compound. be(bro₃)₂
Beryllium bromate
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give the name of this ionic compound. naclo₃
Sodium chlorate
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a student is using a copper strip and a strong chlorine solution in her…
reactivity of the copper strip
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air is made up of different gases, such as oxygen, nitrogen, and carbon…
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.