Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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2. what is the amount of three - dimensional space an object occupies? …
C. volume
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tarea de ciencias de 7.º grado: comprensión de la materia nombre: diann…
Para ser considerado materia, algo debe tener masa y tomar espacio.
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pre-lab question 3.8 homework * unanswered * due today, 11:59 pm mark a…
88
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elements, like oxygen found in the atmosphere, iron, or sulfur are made…
one (the checkbox next to "one" should be selected)
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25) how many joules are there in a 255 calorie snack bar? a) ( 2.55 \ti…
B) $1.07\times 10^{6}$
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12. for the bohr models of diagrams a through d, provide the following …
### Diagram A (Assuming Bohr Model with Atomic Number 6, as Carbon has atomic number 6) #### Step 1: Identify the Element The atomic number (number of protons) determines the elem…
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refer to the slides. 2 sig figs molar mass of alcl3 is 133.33 g/mol mol…
\( \boxed{5.6} \) (in moles)
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question 14 (10 points) listen the contents on a box of cupcakes lists …
B. It decreases the percent of unsaturation that is present.
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what product is formed in the hydration reaction shown below? chemical …
The first option (the structure with the \(OH\) group on the carbon bonded to two methyl groups)
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what product is formed from the reaction below? chemical structure (cyc…
The second option (the structure with the cyclopentane ring and -CH₃ attached, representing methylcyclopentane, formed by hydrogenation of the alkene double bond).
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what is the iupac name of this compound? 5-ethyl-4-methyl-4-heptene 3-e…
3 - ethyl - 4 - methyl - 3 - heptene
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which molecular formula does not represent an unsaturated hydrocarbon? …
$C_8H_{18}$ ### Second Question (cis - 2 - pentene and trans - 2 - pentene...):
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what is ionization energy? ionization energy is the energy required to …
Ionization energy is the energy needed to remove an electron from an atom, measured in kJ/mol, with outer - shell electrons generally requiring less energy to remove than inner - …
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11. calculate the number of neutrons in a 10g sample of ar atoms (40g/m…
Approximately $\boldsymbol{3.31\times10^{24}}$ (or $3.3\times10^{24}$) neutrons.
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question 9 (10 points) listen what is the structure of 2-methyl-3-hexen…
\(\boldsymbol{(CH_3)_2CHCH = CHCH_2CH_3}\) (the fourth option)
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what monomer is used to form the polymer below? chemical structure of p…
The third option (the one with \( \text{CH}_3 \), \( \text{Cl} \) on one \( \text{C} \), \( \text{Br} \), \( \text{CN} \) on the other \( \text{C} \) with a \( \text{C}=\text{C} \…
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which is the molecular formula of an alkyne? c₁₀h₁₈ c₉h₁₈ c₈h₁₈ c₁₀h₂₀ …
\( \boldsymbol{C_{10}H_{18}} \)
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write the formulas and names for compounds of the following ions: chart…
To solve for the chemical formulas, we use the criss - cross method where the charge of the cation becomes the subscript of the anion and vice - versa, and then we simplify if pos…
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use the equation below to answer the following questions: 2fe₂o₃ + c → …
s for the Questions: - Is mass conserved? Y - Did a chemical reaction occur? Y
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label the chemical equation below: $\boldsymbol{6}\text{co}_\boldsymbol…
- Red - boxed 6: Coefficient - Blue - boxed 2: Subscript - \( 6\text{CO}_2 + 6\text{H}_2\text{O} \): Reactant - \( 6\text{O}_2+\text{C}_6\text{H}_{12}\text{O}_6 \): Product
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which of the following cannot display cis-trans isomerism? 2-bromo-3-oc…
1 - heptene
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ionic radius (stronger/weaker; gains/loses) - metals ions are ____ than…
- Metals ions are \(\boldsymbol{\text{smaller}}\) than metal atoms, because the atom \(\boldsymbol{\text{loses}}\) electrons to form the ion. - Nonmetal ions are \(\boldsymbol{\te…
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what is the structure of 3-methylcycloheptene? options with chemical st…
The second option (the one with the 7 - membered ring, a double bond, and a $CH_3$ group attached to a carbon in the ring)
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identify each description below as an element, compound, heterogenous m…
Element ### 2) uniform structure Homogeneous mixtures (and pure substances) have uniform structure. But since mixtures are considered, homogeneous mixtures (e.g., solutions) have …
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hydrogenation is the addition of ______ to an alkene. ○ hydrogen (h) ○ …
B. hydrogen gas ($\ce{H_2}$) (assuming the second option is labeled B; if the original labels are different, adjust the label accordingly with the text "hydrogen gas ($\ce{H_2}$)")
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what type of energy transformation occurs in a power plant where coal i…
c. chemical to electrical
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8. the distinctive feature of the psychodynamic perspective is its emph…
c. unconscious conflicts
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what is the iupac name of this compound? (chemical structure: h₃c-c(=c)…
B. cis - 2 - pentene
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in a typical fossil fuel electricity generating plant, fossil fuels com…
d. The chemical energy stored in the bonds of the fossil fuel and oxygen molecules.
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what is the iupac name of this compound? h₃c | c=c | | h h | ch₂ch₃ opt…
B. cis - 2 - pentene
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6. the cognitive perspective in psychology focuses on how a. feelings a…
d. people encode, process, store, and retrieve information.
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9. neutral atoms of cl are bombarded by high energy (light energy), cau…
Electrons from the \(3p\) subshell of neutral Cl atoms will have the highest velocity after ejection. This is because the \(3p\) subshell electrons have the lowest binding energy …
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some historians believed that the nebra sky disk, discovered in germany…
C. disproved
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learning about chemical equations review: complete the below statements…
To solve this fill - in - the - blank problem about chemical equations and the law of conservation of mass, we analyze each blank based on the concepts of the law of conservation …
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29) how much heat (kj) is needed to raise the temperature of 100.0 gram…
C) 10.5 ### Question 30
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no a balanced chemical equation a a silver necklace reacts with sulfur …
\(Ag\) (silver) and \(S\) (sulfur) ### For "Which chemical formula(s) represents the products?"
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as a student releases a stretched rubber band, which of the following e…
a. potential to kinetic
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7. a chemist wants to examine specific chemical reactions and isolate c…
b. in a laboratory
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#6 energy - color by numbers\tname: bahansidental directions: answer ea…
A. Li (light green) ### Question 2
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35 multiple choice 1 point tree nuts, eggs, milk, soy, wheat, peanuts, …
B. the Big Eight Allergens. ### Question 36
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6) circle the chemicals that have the same groups of atoms: sugar, baki…
Circle sugar and corn starch. ### Question 7: Circle the chemicals that have different groups of atoms: sugar, baking soda, corn starch, plaster of paris.
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5. why does an anion of p³⁻ have a larger radius than a neutral atom of…
A neutral P atom has 15 protons and 15 electrons. The \(P^{3-}\) anion has 15 protons but 18 electrons. The same nuclear charge (from 15 protons) acts on more electrons (18 vs. 15…
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part b : classification of matter 5) in the lab we used these four subs…
Circle: sugar, corn starch ### Question 7: Circle the chemicals that have different groups of atoms
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heavy elements, such as iron and silicon, have a condensation temperatu…
higher
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2. using the law of conservation of mass, determine the missing mass va…
The missing mass (of NaOH) is 25g.
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2. using the law of conservation of mass, determine the missing mass va…
The missing mass is \( 15 \, \text{g} \).
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law of conservation of mass questions 1. the masses of the reactants an…
Yes, the data verifies the law of conservation of mass. Because the total mass of reactants (36g + 40g = 76g) is equal to the total mass of products (58g + 18g = 76g), which is in…
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1. the masses of the reactants and products of the following reaction a…
76g
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law of conservation of mass questions 1. the masses of the reactants an…
(for iii): Yes, the two values (total mass of reactants and total mass of products) are the same (both are 76g).
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35 multiple choice 1 point tree nuts, eggs, milk, soy, wheat, peanuts, …
B. the Big Eight Allergens. ### Question 36
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name : --------------- score : --------------- law of conservation of m…
76g
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law of conservation of mass questions 1. the masses of the reactants an…
76g ### ii)
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law of conservation of mass questions 1. the masses of the reactants an…
76g
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1. the masses of the reactants and products of the following answer the…
76g ### ii)
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• ____________ = the ability of the substance to conduct ____________. …
- First blank: Conductivity - Second blank: electricity ### Second Fill - in (Malleability)
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some of the physical properties used to distinguish between the three g…
First blank: Luster; Second blank: metallic, non - metallic (or specific non - metallic terms like dull, glassy, pearly etc.)
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what monomer is used to form the polymer below? image of polymer and mo…
The third option (the monomer with \( \text{CH}_3 \), \( \text{Cl} \) on one \( C \), \( \text{Br} \), \( \text{CN} \) on the other \( C \), and a \( C = C \) double bond)
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metals, nonmetals and metalloids the three major groups on the periodic…
### Filling in the Blanks (Based on Chemistry Knowledge - Subfield of Natural Science) #### 1. The three major groups on the Periodic Table are the **metals**, **nonmetals**, and …
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sam wonders if coke goes flat faster in cold temperatures or warm tempe…
A. If an opened coke is placed in the refrigerator, then it will not go flat as quickly as an opened coke at room temperature.
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water in the news use the small, yes, but mighty: the molecule called w…
Hydrogen bond. Hydrogen bonds give water properties like high surface tension, high specific heat, and good solvent ability (due to attraction between slightly +H and slightly -O …
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which is the molecular formula of an alkyne? ○ c₁₀h₁₈ ○ c₉h₁₈ ○ c₈h₁₈ ○…
\( \boldsymbol{C_{10}H_{18}} \)
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question 7 (10 points) listen what product is formed in the hydration r…
The first option (the structure with -OH on the carbon with two methyl groups)
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activity: identify the hypothesis (cause and effect relationship) a stu…
B. If the water contains salt particles, then it will freeze faster at a lower temperature. ### Second Question (Hot vs Cold water freezing):
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what is the iupac name of this compound? 5-ethyl-4-methyl-4-heptene 3-e…
D. 3 - ethyl - 4 - methyl - 3 - heptene
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which molecular formula does not represent an unsaturated hydrocarbon? …
$C_8H_{18}$ (or the option with $C_8H_{18}$)
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23) when methane is burned with oxygen the products are carbon dioxide …
A) 64 ### Question 24
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mass: 3. convert 350 mg to kilograms (kg)? 4. a sample of potassium is …
\(3.5\times 10^{-4}\space kg\) ### Question 4
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unit 1 hw: atomic structure & properties section 2 is mcq on college bo…
To determine the element from the PES spectrum, we analyze the relative number of electrons (peak heights) and binding energies (x - axis values, in MJ/mol, related to electron sh…
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unit 1 hw: atomic structure & properties part i: short response use the…
1. Phosphorus (P) 2. (Place 'x' above the peak with binding energy 6.84 MJ/mol) 3. 1.76 MJ/mol; because it has the lowest binding energy, so the ejected electron has the most kine…
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unit 1 hw: atomic structure & properties part i: short response use the…
Phosphorus (or P) ### Question 2
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hydrogenation is the addition of ______ to an alkene. ○ hydrogen (h) ○ …
B. hydrogen gas ($\ce{H_2}$) (assuming the options are labeled A - E in order, with this option being the second one; if labels differ, adjust to the correct label with the text "…
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complete the following practice problems. be sure to use the metric sta…
\(0.00035\) kilometers (or \(3.5\times 10^{-4}\) kilometers)
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metric system review: complete the following practice problems. be sure…
\(3.5\times 10^{-4}\space km\) ### Problem 2:
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which of the following cannot display cis-trans isomerism? 2-bromo-3-oc…
1 - heptene (the option with "1 - heptene")
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4cf₂cl₃, carbon, fluorine, chlorine, 4, 8, 12
8
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11/19 how many hydrogen atoms are in 4h₂o? 6 2 4 8
8 (corresponding to the blue - colored option with the number 8)
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when boiling, the total mass of liquid and vaporized water (1 point) ○ …
D. stays the same.
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c. 0.943 mole h₂o to molecules answer: 5.68 x 10²³ molecules h₂o 0.943 …
The number of \( \text{H}_2\text{O} \) molecules is \( \boldsymbol{5.68 \times 10^{23}} \).
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what is the activation energy of a reaction? (1 point) ○ the minimum en…
A. the minimum energy required by the reactants for the reaction to proceed
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complete this assessment to review what youve learned. it will not coun…
C. rusting
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9/15 2 ch₂co₃oh number of c: number of h: number of o: drag these tiles…
Number of C: 4 Number of H: 6 Number of O: 8
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clara buys 11 pounds of organic blueberries. each pound costs $5. if sh…
5
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11) a) barium metal is in group-2 (or iia).what type of ion will it for…
Cation (specifically \( \text{Ba}^{2+} \) - but the type is cation) ### Part (b)
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due on or before sept 8th (monday) homework problems late homework = ze…
\( 19.9 \text{ mol} \) ### Part (b)
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late homework = zero use factor-label (dimensional analysis) method to …
\( 19.9\ \text{mol} \) ### Part (b)
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question 4 of 5 read these lines from the monk’s tale. in tragic manner…
D. abca
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question 3 of 5 according to the monk, why does fortune abandon people?…
D. Because people become prideful and believe that she will always reward them.
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a chemist equally distributes 0.5 liters of a solution among 10 beakers…
C. 0.05 L
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72) ischemia of the myocardium may result in: ○ aneurysm ○ angina pecto…
B. angina pectoris ### Question 73
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each layer of earth has different physical and chemical properties. thi…
Composition of the layers
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taken ap chem 2017 free-response questions answers: (a) 0.31 mol cl₂ an…
\(0.31\,\text{mol}\) ### Part (a)(ii)
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in science, one frequently needs to use conversion factors to change fr…
\( 1000\space mL \) ### Part b: Convert \( 0.78\space \mu L \) to mL
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25) what is obstruction of blood vessels by a clot or any foreign subst…
B. embolism ### Question 26
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5. how long will it take for 16 grams of ra-226 to break down until onl…
6400 years
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7. the complete photoelectron spectrum of an element is represented abo…
Bromine (Br)
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multiple choice 1 point kaolinite, a clay mineral with the formula al₄s…
55.81 mass%
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an integer, n, and its opposite, -n, combine to make 0 4 and -4 are opp…
An integer \( n \) and its opposite \( -n \) sum to \( 0 \) (\( n + (-n)=0 \)) and are equidistant from \( 0 \) on the number line. ### Question 2
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which of the following elements has the mass spectrum represented above…
B. Mo
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underground limestone caverns can be formed over long periods of time a…
chemical weathering
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1. choose the correct answer. the study of ______ will help you make go…
mathematics (the option with "mathematics" as the text) ### Question 2