Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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10. give the correct chemical name for the following chemical formula: …
Pentaphosphorus nonoxide
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part 2- write a balanced molecular equation for the following reactions…
\(Ca + 2H_2O = H_2+Ca(OH)_2\)
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9. which is not a diatomic molecule? boron nitrogen fluorine bromine
Boron
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8. which is the correct name for the compound n₂o₄? tetranitrogen dioxi…
B. Dinitrogen tetroxide
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question 1 how many atoms of chlorine are in 9.03315e23 molecules of su…
\(1.80663\times 10^{24}\)
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give the correct chemical name for the following chemical formula: fepo…
Iron(III) phosphate
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6. give the correct chemical name for the following chemical formula: n…
Dinitrogen trisulfide
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5. which is the correct name for the compound pcl₅ monophosphorus tetra…
Phosphorus pentachloride
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4. which of the following options is the correct chemical formula for z…
B. \(Zn(C_{2}H_{3}O_{2})_{2}\)
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3. give the correct chemical name for the following chemical formula: b…
Silicon boride
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2. which two substance are covalent compounds? c₆h₁₂o₆ & ki nacl & hcl …
D. \(C_{6}H_{12}O_{6}\ \&\ HCl\)
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which of the following elements would need to appear as a diatomic mole…
C. Iodine
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c₂h₅oh + o₂ → co₂ + h₂o
$$\ce{C2H5OH + 3O2 ightarrow 2CO2 + 3H2O}$$
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9. what is the correct formula for the compound formed between magnesiu…
Mg₃(PO₄)₂
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6. which of the following is not a molecular (covalent) compound? nh₄oh…
NH₄OH
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write the formula for the sodium carbonate ion. • subscripts and supers…
\(Na2CO3\)
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5. which of the following answers contain the elements that are diatomi…
Oxygen, Fluorine, Chlorine, Bromine, Nitrogen, Hydrogen, Iodine
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give the correct chemical formula for the chemical compound antimony tr…
$SbBr_3$
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write the formula for the carbonate ion. • subscripts and superscripts …
\(CO3^{2 -}\)
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3. give the correct chemical formula for the chemical compound hexacarb…
\(C_6H_{10}\)
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2. which is the correct formula for the compound sulfur hexachloride? s…
C. \(SCl_{6}\)
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write the formula for the sodium ion. • subscripts and superscripts are…
\(Na^+\)
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1. which is the correct formula for the compound dinitrogen monoxide? (…
C. \(N_2O\)
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9. give the correct chemical formula for the chemical compound diphosph…
$P_2O_5$
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drag each tile to the correct box match the terms used in presentation …
1. slide master 2. slide 3. placeholder 4. themes
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8. 1. a chemist performs the same test on two solids, a & b. the result…
Solid A contains ionic bonds and Solid B contains covalent bonds.
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can you do it backwards? how many formula units will be in 89.3 grams o…
3.07E23
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7. which pair of elements is most likely to form a molecular compound w…
Sulfur (S) & Fluorine (F)
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question 3 how many grams will 5.854e21 formula units of mercury(ii) ni…
3.156 g
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6. the table shows the properties of four solids. which substance could…
D. Substance D
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4. which statement best describes two substances forming a covalent bon…
B. Two nonmetals combine because they share valence electrons.
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3. use the diagram to help choose the statement that is most likely to …
The left beaker contains a covalent compound, and the right beaker contains an ionic compound.
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question 2 what is the molar mass of mercury(iii) nitrate 324.62 g/mol …
324.62 g/mol
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2. a covalent compound is likely to be known for creating which of the …
A. A molecular compound of atoms bonded to other atoms.
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question 1 what is the formula of mercury(ii) nitrate? hg₂no₃ hg(no₃)₂ …
Hg(NO₃)₂
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1. which substance below is held together by electrons that are being s…
HCl
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a sample of 8.34 moles of iron(iii) sulfite will weigh how many grams? …
\(2.93E3\space g\)
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if litmus paper is dipped in an acidic solution,what will happen? the p…
The paper will turn red.
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if a solution has virtually no hydrogen ions, what type of ph does it h…
13
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5. a substance which helps maintain a constant ph in a solution is a(n)…
D. buffer.
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which of these is a base? hno3 vinegar ammonia hci
ammonia
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an unknown solution has a ph of 8. how would you classify this solution…
basic
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which of these is a property of acids? they turn litmus paper blue. the…
They produce hydrogen gas when reacted with metals.
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question 1 how many moles of of water are in 25.0 grams of water? 450. …
1.39 mol \(H_2O\)
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what is the molar mass of barium hydroxide? (give the answer in g/mol. …
171.35
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question 1 what is the molar mass of scpo4? (give the answer in g/mol. …
139.93
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(02.06 mc)jadas problem and solution essay includes the following thesi…
In effect, the invasion of European Starlings is severely affecting farmers and their crops.
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multiple choice bubble the correct answer. use the image below to answe…
1. A. an ammonium ion 2. No correct option (assuming there is a mistake in the options as the product of Reaction B (\(HCl + H_2O\)) is a strong - acid solution and none of the gi…
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question 1 what is the formula mass in amu of ag2so4? do not use spaces…
311.81
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if a sample has 0.4578 moles of calcium chloride, how many formula unit…
A. \(2.757E23\) for. unt. \(CaCl2\)
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question 1 how moles are 3.57e23 atoms of sulfur? 1.687 mol s 5.92e45 m…
\(0.593\text{ mol S}\)
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match the amount with the number. 3.011e23 choose choose 1.2044e24 3 mo…
- \(3.011\times 10^{23}\): \(0.5\) moles - \(1.2044\times 10^{24}\): \(2\) moles - \(2.4088\times 10^{24}\): \(4\) moles - \(1.506\times 10^{23}\): \(0.25\) moles
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4. what piece of safety equipment is used to wash chemicals off a perso…
d. the emergency shower
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indicate the type of particle represented by the formula. cu(no3)2 co2 …
\(Cu(NO_3)_2\): formula unit; \(CO_2\): molecule; \(Fe\): atom; \(Br_2\): molecule; \(NH_4^+\): ion; \(BaO\): formula unit.
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indicate the type of particle represented by the formula. cu(no3)2 co2 …
Fe: atom NH₄⁺: ion
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1. why is science safety important? a. the science lab is a safe place …
d. Many science activities present potential hazards.
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what is inside an atom? democritus and john dalton thought that atoms c…
Protones y neutrones.
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question 8 what happens to the molecules of a substance as it changes f…
The molecules speed up and move farther apart
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what is the process called when a substance changes from a gas to a liq…
Condensation
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question 6 what happens during condensation? ○ a solid turns into a gas…
a gas turns into a liquid
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the chemical structures of indole and tryptophan are very similar. base…
Indole has fewer polar covalent bonds than tryptophan, Tryptophan is a larger molecule than indole.
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before the reaction started. if the reacting substances are less stable…
The black double - headed arrow at the transition state.
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potential energy electrical energy energetic coupling thermal energy ch…
- Potential energy: Energy that is related to an object's position. - Electrical energy: Energy related to interactions among charged particles. - Energetic coupling: A phosphoryl…
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whats the rule? where is the best place to find the hazards of chemical…
Safety Data Sheet (SDS)
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graphs like this plot the changes in free energy that occur over the co…
Spontaneous reaction
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what is the key difference? electrons are shared equally between atoms …
- First question: Electrons are held more tightly by nuclei in the products of processing than they are in the food. - Second question: It has extremely high electronegativity. - …
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what is the key difference? electrons are shared equally between atoms …
- First question: Electrons are held more tightly by nuclei in the products of processing than they are in the food. - Second question: It has extremely high electronegativity. - …
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what type of bond is formed when electrons are shared equally between t…
Nonpolar covalent bond
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21) oxygen______symbols: p ag zn c cl 22) phosphorus______ 23) silver__…
21) Oxygen - O 22) Phosphorus - P 23) Silver - Ag 24) Chromium - Cr 25) Argon - Ar 26) Potassium - K 27) Hydrogen - H 28) Gold - Au 29) Helium - He 30) Barium - Ba 31) Lithium - L…
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what causes the partial positive charge on the hydrogen atom in a water…
The hydrogen atom shares electrons unequally with the oxygen atom.
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4. calculate the specific rotation of (2r,3r)-tartaric acid based on th…
The specific rotation of \((2R, 3R)\) - tartaric acid is approximately \(12.4^{\circ}\) (with units \(^{\circ}mL/(g\cdot dm)\))
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name nick s element quiz #4 write the correct symbol in front of each e…
1) Sn 2) Pt 3) B 4) Rn 5) Al 6) Be 7) Ti 8) Xe 9) Na 10) U 11) Sn 12) Mg 13) Pb 14) Kr 15) Ca 16) Ne 17) Fr 18) Cu 19) Ni 20) Cs
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1 what do chefs change with many dishes they serve? a the properties, s…
A. the properties, structure, and state of matter of food
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18. how does the poems structure contribute to its exploration of apoca…
18. B. Its fragmented form mirrors the dissolution it describes 19. D. It embodies both destruction and potential renewal
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3. what is the lowest molar mass alkane that is chiral? draw stereochem…
The lowest molar mass chiral alkane is 3 - methylhexane. For 3 - methylhexane: - Enantiomer 1 (R - 3 - methylhexane): [Draw the stereochemical formula with the appropriate group o…
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2 which two statements are true for every salt? it is a mixture it is a…
- It is a compound - It forms from ions joined by ionic bonds
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the diagram shows the motion of a group of water molecules over a heat …
They are farther apart.
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13 multiple choice 1 point what is the mole ratio of all the substances…
2:3:2
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multiple choice 1 point for the reaction represented by the equation so…
93.9%
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multiple choice 1 point what is the ratio of the actual yield to the th…
percentage yield
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which reactant controls the amount of product formed in a chemical reac…
First question: limiting reactant Second question: limiting reactant
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multiple choice 1 point for the reaction represented by the equation ( …
4.5 g
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practice together directions: on the lines provided, write whether the …
1. Physical property 2. Physical property 3. Chemical property 4. Physical property 5. Chemical property 6. Physical property 7. Chemical property 8. Physical property
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for the reaction represented by the equation ( 2na + 2h_2o \to 2naoh + …
4.5 g
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6 multiple choice 1 point for the reaction represented by the equation …
120 g
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question 5 points 2 for the topic sentence, \chemicals are harmful to h…
Organic products should replace chemicals.
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for the reaction represented by the equation 2na + 2h₂o → 2naoh + h₂, h…
B. \(0.904\space mol\)
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for the reaction represented by the equation ( c + 2h_2 \to ch_4 ), how…
20 mol
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in the reaction represented by the equation 2al₂o₃→4al + 3o₂, what is t…
\(4:3\) ### Second Question
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what is matter?
Matter is anything that has mass and takes up space. It can exist in different states such as solid, liquid, and gas.
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1 multiple choice 1 point which branch of chemistry deals with the mass…
1. C. stoichiometry 2. C. mole ratio of any two substances in the reaction
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6 how does the presence of water affect ionic bonds? a water dissolves …
A. Water dissolves ionic bonds
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when 0.503 g of sodium metal is added to an excess of hydrochloric acid…
\(\Delta H=-478\space kJ/mol\)
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calcium oxide reacts with water to form calcium hydroxide. when 11.1 g …
\(-68.9\ kJ/mol\)
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4 unlike neutral atoms, ions have charges because they have unequal num…
Substance B and Substance C.
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the structure of a potassium atom is shown above. what kind of ion is i…
B. A positive ion, because it will give up an electron
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2 fill in the blank to complete the sentence. not all answer choices wi…
electrons
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brainpop science / investigation / observe and check | page 3 of 6 ques…
C. An atom with a positive or negative charge
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question 1 - 23 ingredients are listed on a food label in descending or…
weight.
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2 when two ions meet, they bond together. use the table above to determ…
B. Ionic bond