Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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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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which term correctly describes the relative position of the two substit…
ortho
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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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what is the iupac name of this compound? h₃c | c=c | | h h | ch₂ch₃ opt…
B. cis - 2 - pentene
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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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complete the table below, using the diagram of an atom shown at right. …
The table is already correctly filled as: | name | symbol | charge (in multiples of \(e\)) | approximate mass (amu) | location on diagram | |---------|--------|-------------------…
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select the quantum numbers associated with the 5d orbital. principal qu…
- Principal quantum number (\(n\)): \(5\) - Angular momentum quantum number (\(l\)): \(2\) - Possible magnetic quantum numbers (\(m_l\)): \(-2, -1, 0, +1, +2\)
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which type of elements have fewer valence electrons? nonmetals metals
metals
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what does ductile mean? they can be made into wire. the can be pounded …
They can be made into wire.
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valence electrons are the electrons in the d and f sublevels the electr…
B. the electrons in the highest energy level (s/p)
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consider the bohr model of an atom. part 1 of 2 complete the following …
### Part 1 Explanation (already answered correctly as "absorbed" for electron moving from lower to higher energy orbital, since energy is needed/absorbed for the electron to jump …
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consider the bohr model of an atom. part 1 of 2 complete the following …
absorbed (For Part 2, since the content is not provided, we can't answer it. If you provide the content of Part 2, we can give a corresponding answer.)
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he rearranged the periodic table using atomic mass density atomic numbe…
atomic mass
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part c : identify & draw 8) label the pictures with the words. remember…
### 1. Análisis de la imagen 1 (número 1) - **Observación**: Hay varias moléculas idénticas (cada molécula es un par de átomos blancos). - **Clasificación**: Es una sustancia form…
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15. suppose the writer’s primary purpose had been to offer an example o…
D. No, because it explains that triangular snowflakes appeared to, but don’t actually, violate the basic laws of chemistry.
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which process is used to separate soluble compounds from insoluble comp…
B. Filtration
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the formula for the ionic compound formed between calcium ions and chlo…
C. Calcium and chloride ions exist in a 1:2 ratio in a crystal of \(CaCl_2\)
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question 7 of 16 points possible: 1.00 identify each described physical…
Filtration ### Second Description:
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multiple-choice question the reaction that cooks your meal is – enthalp…
D. endothermic
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multiple-choice question which best describes a burning campfire? □ end…
C. exothermic and an increase in entropy
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multiple-choice question what type of entropy is likely to help a chemi…
D. high entropy with lots of randomness/disorder
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multiple-choice question a measure of a chemical’s randomness is called…
D. entropy
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rs a chemical reaction? - kareem jarrah image with caption: \because th…
C. exothermic reactions are more likely because they require less energy (assuming the third option is labeled C, if the options are A - D with the third being C, the full option …
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reaction? - kareem jarrah of the proteins in the eggs and various compo…
B. the energy in the products is more than in the reactants
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select the correct answer. which professional is displaying positive wo…
D. a chemistry teacher who stays after class to help students understand a challenging topic
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select the correct answer ricky works outdoors. he faces rough weather,…
C. construction
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in an exothermic reaction... the energy in the products is the same as …
B. the energy in the products is less than in the reactants
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what triggers a chemical reaction? - kareem jarrah ted ed the hole repr…
B. added, released
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question 10 what term matches the definition below? the basic chemical …
d. Combustion Cycle ### Question 11
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multiple-choice question where is potential energy stored in a molecule…
B. In the chemical bonds between the atoms
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3. how many molecules are there in 216 g of ascorbic acid, c₆h₈o₆? (mol…
D. \( 7.39 \times 10^{23} \) molecules
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activity: understanding elements, compounds and mixtures at the particl…
### Part 1: Matching Descriptions to Boxes #### 1. Element An element consists of only one type of atom. Box B has only one type of particle (triangles), so it represents an eleme…
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question 2 / 14 is the following a chemical or physical property of mat…
B. physical
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question 1 / 14 is the following a chemical or physical property of mat…
B. physical
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7. how many sodium atoms are there in 6.0 g of sodium nitride, na₃n? (m…
A. \( 1.3 \times 10^{23} \) atoms
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6. what is the mass in grams of 0.732 mol of glucose, c₆h₁₂o₆? (molar m…
C. 132 g
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which proposal best demonstrates a refined solution for reducing the ne…
Creating buffer zones of native plants around fields to reduce runoff and provide habitat for wildlife.
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5. consider the following four compounds. which ones are ionic compound…
E. II and III
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1) today’s pressure is 29.71 inches of mercury. standard pressure is 29…
Approximately \(\boxed{644}\) grams (the exact value may vary slightly depending on rounding during calculations)
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4. element x has two naturally occurring isotopes of masses 106.905 amu…
B. 107.9 amu
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3. which of the following represent isotopes? a. (ce{^{40}_{18}ar}) and…
B. $\ce{_{6}^{12}C}$ and $\ce{_{6}^{13}C}$
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1) today’s pressure is 29.71 inches of mercury. standard pressure is 29…
To solve the problem, we need to determine the mass of oxygen in the room using the ideal gas law. However, we notice that the volume (\(V\)) of the room and the temperature (\(T\…
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78% of the air we breath is ______. ○ $n_2$ gas ○ oxygen ○ carbon ○ arg…
A. \( N_2 \) Gas
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8 le modèle de dalton compare les atomes aux blocs d’un jeu de construc…
Atoms and construction blocks are both fundamental, indivisible (in their role of building) units that combine to form larger entities: atoms combine to form molecules/compounds, …