Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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which of the lewis structures in the image is correct?
D.
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which of the lewis structures in the image is correct? c b a d
D
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which of the lewis structures in the image is correct? a b c d
A.
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level: 2/2 covalent bonding and molecules 4 more questions to go which …
D.
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which of the lewis structures in the image is correct? a b c d
A. Option Text
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which of the lewis structures in the image is correct? a b c d
D.
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practicing periodic table trends directions: locate each element below …
- Germanium (Ge): Period 4, Group 14. - Radium (Ra): Period 7, Group 2. - Sulfur (S): Period 3, Group 16. - Oganesson (Og): Period 7, Group 18. - Period 2, Group 14: Carbon (C). -…
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add a comma or semicolon if needed. otherwise, submit the text without …
Some plant species have spines to protect themselves, or use chemical deterrents to repel insects.
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5. what is the reaction between an acid and a base that produces a salt…
- 5. C. A neutralization reaction - 6. C. single - replacement - 7. D
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which of the following best describes revenge in othello? a quick respo…
For the first question: B. A destructive obsession that harms both the seeker and the innocent. For the second question: He manipulates others to punish Othello for perceived wron…
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1. examine the image below. what are the dots in the image used to repr…
1. D. valence electrons 2. C. It slows them down. 3. D. 8 4. B. An indicator
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coarseness, ductility, transparency. 6 multiple choice 1 point a gaseou…
non - metal
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1 multiple choice 1 point a \period\ on the table refers to ____. a ver…
1. B. a horizontal row 2. B. a vertical column
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which statement(s) is/are true about matter? select all that apply a al…
C. All matter has mass, D. All matter has volume
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13 multiple choice 1 point identify the non - metal: cl cu ce
Cl
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which statement(s) is/are true about matter? select all that apply a al…
C. All matter has mass, D. All matter has volume
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when water unfreezes (melts), what happens to the volume of the sample?…
It decreases.
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why does the volume of a substance contract when it loses heat/energy? …
because its molecules move closer together
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why does the volume of a substance expand when it gains heat/energy? be…
because its molecules move further apart
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4. the bohr models for sodium (na) and sulfur (s) are shown below. exam…
Circle Sodium (Na). Sodium has fewer protons (11) compared to sulfur (16). In the same period (period 3), as the number of protons (positive charge) increases in sulfur, the force…
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the second aswan dam, which was completed in 1970, was built to prevent…
D. the building of the second Aswan Dam
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read this line from \the soldier of mictlán.\ let the mayor sniff the s…
B. alliteration
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● germanium (ge) period:__________ group:__________ ● radium (ra) perio…
- Germanium (Ge): Period 4, Group 14. - Radium (Ra): Period 7, Group 2. - Sulfur (S): Period 3, Group 16. - Oganesson (Og): Period 7, Group 18. - Period 2, Group 14: Carbon (C). -…
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2. put the following in order from least to most electronegative. expla…
2. Beryllium < Boron < Carbon < Nitrogen < Fluorine. 3. Chlorine is more electronegative. 4. Beryllium > Magnesium > Calcium > Barium > Radium. 5. Magnesium has a lower first ioni…
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consider the sample sds for hydrochloric acid and answer the questions.…
- Physical state: liquid - Solubility in water: yes
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consider the sample sds for hydrochloric acid and answer the questions.…
- Physical state: liquid - Solubility in water: yes, hydrochloric acid is soluble in water.
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consider the sample sds for hydrochloric acid and answer the questions.…
liquid
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consider the sample sds for hydrochloric acid and answer the questions.…
gas
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consider the sample sds for hydrochloric acid and answer the questions.…
For the storage question: in a cool, well - ventilated area, in a tightly closed container. For the eye - splash question: flush eyes with water.
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consider the sample sds for hydrochloric acid and answer the questions.…
For the storage question: in a cool, well - ventilated area; in a tightly closed container. For the eye - splash question: Flush the eyes with plenty of water for at least 15 minu…
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consider the sample sds for hydrochloric acid and answer the questions.…
- in a cool, well - ventilated area - in a tightly closed container
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you should invest in my ice cream business; the average australian eats…
1. Logos 2. Pathos 3. Ethos 4. Pathos 5. Ethos 6. Logos 7. Pathos 8. Ethos
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email * record 1979152@sumnerk12.net as the email to be in write the ch…
\(Cu_{3}(PO_{4})_{2}\)
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module 3 section 3.2 coulombs law coulombs law states that the electros…
opposite; protons; electrons; protons and electrons; nuclear charge; distance
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what steps should you take to respond to an accident? notify the teache…
- Notify the teacher immediately. - Immediately wash off any chemicals on skin or eyes with cool running water. - Remain calm and help others remain calm.
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write the formula for zinc acetate. * your answer how many moles of feb…
Zinc acetate: \(Zn(C_{2}H_{3}O_{2})_{2}\) Moles of \(FeBr_{3}\): \(4.32\) Hydrobromic acid: \(HBr\) \(H_{2}SO_{3}\): Sulfurous acid
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what is the proportion of moles of sodium azide that are used compared …
C. For every 2 moles of sodium azide used, 2 moles of sodium are produced
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the molar mass of nitrogen gas (n₂) is (round to the nearest tenths pla…
\(28.0\space g/mol\)
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the molar mass of nitrogen gas (n₂) is (round to the nearest tenths pla…
A. \(58\ g\ N_2\)
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which behaviors are most likely to be prohibited in a safety contract? …
modifying the lab procedure without the teacher’s permission, leaving active heat sources unattended, using laboratory chemicals for practical jokes or tricks
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which of these statements is most likely to be part of a safety contrac…
Safety goggles must be worn during all laboratory activities.
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how does the structure of this sonnet most clearly affect its meaning a…
Its regular pattern of rhythm, or meter, reflects the progression of one season to the next.
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this picture shows students working in a chemistry laboratory. what cou…
All of the options (Label the test tubes and plastic cups, Move the fire extinguisher closer to their table, Wear chemical protective gloves, Reduce the clutter on the table, Stan…
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what should maria do before she turns on the bunsen burner to begin the…
Inspect the Bunsen burner and gas tubing for damage.
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for a particular experiment, maria must heat water in a glass flask usi…
heatproof gloves
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for a particular experiment, maria must heat water in a glass flask usi…
heatproof gloves
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gene is performing a lab activity. part of the instructions for the act…
4. Use heat - resistant gloves or tongs to swirl the flask. 3. Put on safety goggles and an apron. 2. Check the flask for chips and cracks. 1. Read the entire lab procedure throug…
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gene is performing a lab activity. part of the instructions for the act…
4. Use heat - resistant gloves or tongs to swirl the flask. 3. Put on safety goggles and an apron. 2. Check the flask for chips and cracks. 1. Read the entire lab procedure throug…
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test 2, page 4 problems: solve the problem; show your work in the space…
- Molecular mass of \(NO_2\): \(46.01\space g/mol\) - Molar mass of \(AgNO_3\): \(169.91\space g/mol\)
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gerry and lena work in a modern physics laboratory and study nanotechno…
hypothesis
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formulas for ionic compounds with monatomic ions only using each of the…
formula: \(AuF_{3}\) ratio: \(1:3\)
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greenhouse effect cfcs (chlorofluorocarbons) greenhouse gases aerosols …
- For the first row: Aerosols - For the second row: CFCs - For the third row: Greenhouse Gases
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balance the following equation: ___ c₃h₈ + ___ o₂ → ___ co₂ + ___ h₂o y…
1. \(1C_3H_8+5O_2 ightarrow3CO_2 + 4H_2O\) 2. \(102.6\space g\) of \(H_2O\) 3. \(N_2O_4\) 4. \(Ag_2CrO_4\)
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write the name for h₂o. * your answer what is the molar mass of luminol…
1. Water 2. \(177\ g/mol\)
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what is a type of matter with its own unique properties that is made of…
A. Element
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question 3 what happens to the particles in a liquid when it is heated …
The particles move faster and spread far apart.
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methane emissions are expected to rise in the future if the atmosphere …
Methane’s release into the atmosphere will contribute to further warming, which in turn will release even more methane.
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which of these gases is produced by a battery during charging? a. heliu…
D. Hydrogen
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answer the question in a complete sentence what problems can chemical c…
- Chemical cleaners can cause health problems and environmental pollution. - B. gasp - False
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electron configuration practice chemistry name: due date: e. in the spa…
6) \([Ar]3d^74s^2\) 7) \([Kr]4d^{10}5s^1\) 8) \([Kr]4d^{10}5s^25p^4\) 9) \([Rn]7s^2\) 10) \([Rn]5f^{14}6d^17s^2\) 11) Sulfur 12) Rubidium 13) Antimony 14) Osmium 15) Einsteinium
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as part of a demonstration, mr. garcia took flat copper, cu, wire, wrap…
D. The atoms in the silver and copper rearranged as they reacted, producing silver nitrate solution and copper (II) nitrate solution.
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during a chemistry demonstration, a student added liquid hydrochloric a…
C. The atoms in the hydrochloric acid and baking soda rearranged, forming products with different properties
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enzymes: ph before we look at how ph can affect enzyme function, we nee…
- pH stands for: Potential of Hydrogen - What is the pH scale: A scale (0 - 14) to measure acidity/alkalinity. - The pH of pure water: 7 - What is an acid: Substance that donates …
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15. convert 1.73x10²⁴ atoms of k into moles: (5 points) include all uni…
\(2.87\space\text{mol}\)
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8. calculate the percent composition of a compound composed of sulfur a…
B. \(39.1\%\text{ O}, 60.9\%\text{ C}\)
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8. calculate the percent composition of a compound composed of sulfur a…
B. \(39.1\%\ O, 60.9\%\ C\)
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1. a solvent is: (0.5 points) a. the solid that gets dissolved in a sol…
1. c 2. a 3. a 4. d 5. a 6. b 7. b, c
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state property of concentrated sulphuric (vi) acid showed by the follow…
I. Dehydrating agent II. Oxidizing agent III. Non - volatile acid
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23. the scheme below shows some reaction sequence starting with solid m…
- (a) Zinc - (b) \([Zn(NH_3)_4]^{2+}\)
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14. study the table below and use it to answer the questions that follo…
- Bond type: Ionic bond (e.g., in \(NaCl\), sodium donates an electron to chlorine to form \(Na^{+}\) and \(Cl^{-}\) ions which are held by ionic bonds). - Structure: Giant ionic …
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how many moles of kclo3 solid must be reacted according to the followin…
\(0.765\)
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what is the change in enthalpy in kilojoules when 3.24 g of ch₃oh gas i…
\(12.8\space kJ\)
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which one of the following is an example of the first law of thermodyna…
C. When a combustion reaction produces heat, that heat is absorbed by the air around the reaction.
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when water cools from 10°c and then freezes to become ice, which of the…
D. The water is releasing energy as its temperature decreases, and that energy is absorbed by the surroundings.
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which one of the following is an example of a state function? answer: a…
D. enthalpy
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a state function is best described as answer: a a function that depends…
C. a function that depends only on the starting point and ending point of a process.
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the average adult human burns $2.00\times10^{3}$ kcal per day in energy…
\(349\)
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the msds for sodium hydroxide gives it a health rating of 3, a flammabi…
highly corrosive but not highly flammable
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multiple - choice question what type of bond is most polar? ionic bond …
ionic bond
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multiple - choice question when ionic compounds are dissolved they can …
can conduct electricity
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multiple - choice question ionic bonds form between a metal and a non -…
A. a metal and a non - metal
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the bond formed by the transfer of electrons from one atom to another i…
C. Ionic Bond
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what type of bond involves the sharing of electrons? atom bonds covalen…
B. covalent bonds
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the distance between two nuclei at the point of minimum energy? the neu…
the bond length
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multiple - choice question why do atoms bond at all? to reach their low…
to reach their lowest possible energy
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atomic elationships\ are called friends connections partners bonds rewa…
Bonds
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reading poetry: poetic devices read the poem. skimming the bottom in th…
abab
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count the number of oxygen atoms in the following chemical formula. 4ca…
24
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3.4: the mole 1. consider the definition of an atom. a. why do scientis…
1. a. Atoms are too small to count individually; the mole helps deal with large numbers. 1. b. \(6.022\times 10^{23}\) 1. c. Avogadro’s 2. \(7.53\times 10^{23}\) particles 3. \(1.…
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in this chemical formula, which part are the reactants? 6co₂ + 6h₂o → c…
C. Everything to the left of the arrow
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1. what is unusual about the rhymes in lines 34, 36, and 38? a. each li…
1. A. Each line has a word within it that rhymes with its last word. 2. A. The rhyme scheme creates a dreamy and light feeling.
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remember: you cant change the formulas! reactants products h h o o h₂ +…
The coefficients are \(2\) (for \(H_2\)), \(1\) (for \(O_2\)) and \(2\) (for \(H_2O\)). So the answer for the first blank ( \(H_2\)) is \(2\), the second blank (\(O_2\)) is \(1\) …
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in this chemical formula, which part are the products? 6co₂ + 6h₂o → c₆…
Everything to the right of the arrow.
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remember: you cant change the formulas! reactants h o products h o ____…
The coefficients are \(2\) for \(H_2\), \(1\) for \(O_2\), and \(2\) for \(H_2O\). So the answer for the coefficient of \(H_2\) is \(2\), for \(O_2\) is \(1\), and for \(H_2O\) is…
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a balanced equation is where the the number of atoms of each type of el…
The number of atoms of each type of element are equal both before and after the chemical reaction.
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remember- you cant change the formulas! reactants products _____ h₂ + _…
The coefficients are \(2\) (for \(H_2\)), \(1\) (for \(O_2\)) and \(2\) (for \(H_2O\)). So the answer for the coefficient of \(H_2\) is \(2\), for \(O_2\) is \(1\) and for \(H_2O\…
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bell work 11/19 is this a balanced chemical equation? ab + c → ac + 2b …
No
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a. rossetti uses an aabb rhyme scheme within each stanza to group the q…
D. The abab rhyme scheme within each stanza separates the lines spoken by the guide and the traveler and emphasizes the conversational nature of the poem.
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use the text to compare and contrast apples and pears. apples and pears…
- Represented long life in ancient China: Pears - Represented peace in ancient China: Apples - Represented long life in ancient Britain and Scandinavia: Apples - Help people fight…
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use the text to compare and contrast natural glue and synthetic glue. f…
- Takes a long time to dry: Natural glue - Hard to wash off: Synthetic glue - Gets weaker with age: Natural glue