Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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question 1 of 25 identify a characteristic of irritant contact dermatit…
It is not usually chronic if precautions are taken.
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electron configuration practice worksheet in the space below, write the…
\(1s^2 2s^2 2p^6 3s^1\) ### Problem 2: Full Electron Configuration of Iron
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in what way are the lines of \the weary blues\ similar to the lyrics of…
A. The poem uses repetition to create meaning.
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for each wrong. barney m camille w it right aw neville pulled out the b…
the use of an incorrect or inappropriate instrument
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the use of an incorrect or inappropriate instrument the use of an uncal…
the use of an uncalibrated instrument ### For Neville's situation:
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for each of the following examples, select the type of measurement erro…
a misread measurement
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question 10 1.5 pts a(n)______can hamper growth because the flow of inf…
C. closed - system
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chemical changes occur when atoms or molecules share, lose or gain elec…
C. the cookies that are baked at the end.
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groups 17 and 18 on the periodic table are non - metals. elements in gr…
D. react with a metal
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on the periodic table, gold has the atomic number 79. this means that c…
D. an atom of gold has 79 protons.
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magnesium + oxygen → magnesium oxide reaction, how much magnesium is ne…
C. \(15.6\space g/mol\)
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define the following terms: 1. specific heat 2. heat of vaporization 3.…
The amount of heat energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius (or 1 Kelvin). It is a characteristic property of a substance, described b…
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an atom that has lost or gained an electron no longer has a neutral cha…
D. ion
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the force of attraction that holds two atoms together within a molecule…
B. chemical bonding
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what is the molar mass of mgcl₂? a 29.00 g/mol b 89.78 g/mol c 95.21 g/…
C. \(95.21\ g/mol\)
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the number of protons in an atom is known as its atomic choose one opti…
A. number
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elements in a vertical column on the periodic table have similar proper…
D. group
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noble gases are known as __________. choose one option a ionic gases b …
B. inert gases
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which are characteristics of all metals? choose one option a they are m…
A. They are malleable, ductile, and conduct electricity.
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the smallest unit of matter is a(n) ______. choose one option a molecul…
B. atom
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question 13 (1 point) to form an ion with single negative charge, a non…
gain an electron # Question 14
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calculate the molar mass of oxalic acid dihydrate (h₂c₂o₄·2h₂o). g/mol
\(126.07\ g/mol\) (rounded to two decimal places)
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question 11 (1 point) which of the following molecules is known for not…
argon # Question 12
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a(n)______can hamper growth because the flow of information stays withi…
D. closed system
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1c. in your own words, what is an atom?
Un átomo es la partícula más pequeña de un elemento químico que conserva las propiedades del elemento, compuesto por un núcleo (con protones y neutrones) y electrones en movimient…
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1a. what do we call two or more atoms bonded together? choose an option…
C. Molecule
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question 9 (1 point) why are noble gases frequently found unreacted? th…
All of the above are true. # Question 10
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writing electron configurations 1. electrons occupy the lowest energy o…
To solve this, we'll use the Aufbau Principle, Octet Rule, and electron shell rules. Let's take **Oxygen (O)** as an example (we can do others similarly): ### Step 1: Atomic Numbe…
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question 7 (1 point) which of the following molecules is known for havi…
nitrogen # Question 8
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drag the missing word into place i cant list every on the per few, like…
element (el círculo con la palabra "element" se debe arrastrar al espacio en blanco de la oración)
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question 5 (1 point) determine the number of lone pairs on a nitrogen m…
2 ### Question 6
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drag the right word to its synonyms stick, cohere bond electron periodi…
Drag "bond" to "stick, cohere"
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question 3 (1 point) using electronegativity, determine which of the fo…
\(C - O\) ### Question 4
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drag the missing word into place the contains the larger subatomic part…
nucleus
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drag the right word to its definition the smallest particle of an eleme…
atom (la palabra "atom" se arrastra a la definición "the smallest particle of an element that can exist")
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question 1 (1 point) which of the following elements is the most electr…
O # Question 2
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drag over the word that goes best with the image molecule electron
molecule
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drag the missing word into place one thing that sets a(n) apart from ot…
neutron
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drag over the word that goes best with the image
electron
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drag the right word to its definition a particle of matter that has no …
neutron (la palabra "neutron" se arrastra a la definición: "a particle of matter that has no electrical charge and forms part of the nucleus of an atom")
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drag over the word that goes best with the image
element
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drag the missing word into place an atom of carbon will with an atom of…
bond
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drag the missing word into place so, dmitri mendeleev lined us elements…
periodic table
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drag the missing word into place let me tell you something you might no…
atom
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drag the missing word into place a(n) of carbon dioxide contains one ca…
molecule (la palabra que se debe arrastrar es "molecule", ya que una molécula de $CO_2$ tiene 1 átomo de C y 2 de O)
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drag the missing word into place my electrons are negative, like theyre…
protons
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your assignment air pressure decreases as elevation increases. identify…
The boiling point of water on a mountain top is lower than \(100^{\circ}C\) (its boiling point at sea - level). When adding thermal energy to water at its boiling point (either at…
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proton noun card 10 of 10 a particle of matter that has a positive elec…
The proton, with its positive charge, plays a crucial role in determining the atomic number of an element.
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periodic table noun card 9 of 10 a table that shows all the elements ar…
La subdisciplina que mejor se aplica es Química (dentro de Ciencias Naturales), ya que la tabla periódica es un componente fundamental del estudio de los elementos químicos y sus …
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covalent compounds show the electron movement, and then draw the lewis …
### 2. $\boldsymbol{H_2S}$ #### Electron Movement: Hydrogen ($H$) has 1 valence electron, and sulfur ($S$) has 6 valence electrons. Each $H$ atom shares 1 electron with $S$, and $…
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21. which of the following is an example of conduction? a) sun warming …
21. C. Metal spoon heating in coffee 22. C. A cup of coffee with a lid 23. A. Chemical to mechanical 24. C. Remains constant 25. C. Radiation
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nucleus noun card 8 of 10 the part of an atom with a positive electrica…
La definición de "nucleus" (núcleo) es: la parte de un átomo con carga eléctrica positiva en el centro y que tiene la mayor parte de la masa del átomo. El núcleo contiene las part…
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energy conservation and thermal energy transfer - exam directions: choo…
1. A. The ability to do work or cause change 2. B. Potential energy 3. C. A rolling ball 4. C. Chemical energy 5. B. Conservation 6. B. Closed system
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solve the system. if there are infinitely many solutions, write each an…
For the first system: \(x=\text{DNE}\), \(y=\text{DNE}\), \(z=\text{DNE}\) For the acid - solution problem: \(15\) liters of \(25\%\) solution, \(15\) liters of \(35\%\) solution,…
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solve the system. if there are infinitely many solutions, write each an…
\(x = 2-3t\), \(y=6 - 5t\), \(z=t\)
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\take hydrogen. add oxygen. burn.\ these instructions, which lead to an…
A. Water
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element noun card 4 of 10 a pure chemical substance that cannot be phys…
Química (subcampo de Ciencias Naturales)
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question 2 of 2 match each si base unit to the appropriate measurement.…
Length - meter, Mass - kilogram, Time - second, Temperature - kelvin, Amount of Matter - mole
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question 3. in a chemistry lab, students were asked to measure the dens…
Percent Error for Trial 1: \(1.90\%\) Percent Error for Trial 2: \(0.22\%\) Percent Error for Trial 3: \(1.12\%\)
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critical thinking 14. explain in a molecule of ammonia, nh₃, three hydr…
Covalent bond.
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card 1 of 10 the smallest particle of an element that can exist. the ch…
atom
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jj thomson named his model of the atom, the \plum pudding\ model. he us…
C. Positively charge uniform spheres with electrons stuck in them.
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how many molecules of carbon dioxide (co₂) are there in 0.450 mol of ca…
\(2.71\times 10^{23}\) (the fourth option)
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mass and atoms quick check the molar mass of ammonia (nh₃) is 17.03 g/m…
\(5g\times\frac{1mol}{17.03g}\) (the first option)
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mass and atoms quick check a scientist uses 3 g of water (h₂o) in an ex…
Determine the molar mass of water.
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select the correct answer what is one function of punctuation in poetry…
D. to change the pace
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mass and atoms quick check which statement describes the quantities tha…
It can be used to find the number of molecules, atoms, or ions.
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5. write out the chemical formulas lithium bromide potassium nitride am…
Lithium bromide: \(LiBr\) Potassium nitride: \(K_{3}N\) Ammonium hydroxide: \(NH_{4}OH\) Calcium phosphate: \(Ca_{3}(PO_{4})_{2}\) Aluminum chloride: \(AlCl_{3}\) Calcium hydroxid…
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question 1. a chemist needs a sample of a metal wire that is 2.5 meters…
\(250\) centimeters
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question 3. in a reaction, a student needs 750 grams of sodium chloride…
\(0.75\space kg\)
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11 what is the name of the ionic compound kcl? a potassium chlorine b p…
B. Potassium chloride
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classify the following traits as characteristic of ionic or covalent bo…
- **Ionic Bonds**: Electrons are transferred between atoms, Made of a metal and non - metal, Made of cations and anions, \(MgCl_2\) - **Covalent Bonds**: Electrons are shared betw…
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chemistry unit 3 common assessment question 9/11 9 which of the followi…
C. Both make the elements more stable
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chemistry unit 3 common assessment question 8/11 8 what is the correct …
A. Option Text
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7 which of the following lists the correct name for pcl₅? a phosphorus …
C. Phosphorus Pentachloride
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6 in a _________________ bond, electrons are shared between atoms. a lo…
B. Covalent
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5 what type of bond is formed between carbon and oxygen in co₂? a ionic…
B. Covalent
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4 what is the formula for the compound between sodium (na) and oxygen (…
D. \(Na_2O\)
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3 which of the following elements is an exception to the octet rule? a …
A. Hydrogen (H)
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the octet rule states that main group elements tend to bond in such a w…
D. 8 electrons
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1 which of the following lists the charges of group 1, group 3, and gro…
C. \(+1\), \(+3\), \(-2\)
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balance the equation? al₂(so₄)₃+? naoh →? al(oh)₃+? na₂so₄, using the s…
4. twelve
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when the equation cu + agno3 → cu(no3)2 + ag is balanced, the coefficie…
4. 2
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8. predicting products 10 pts possible what would be the products of th…
2. \(CaCO_{3}+NaCl\) (pero teniendo en cuenta que la ecuación balanceada es \(CaCl_{2}+Na_{2}CO_{3} ightarrow CaCO_{3}+2NaCl\), la opción 2 es la más cercana en términos de produc…
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14 true or false 2.5 points food and beverages contain nutrients, which…
True
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what is the type of reaction and what are the products for the followin…
# Explicación breve: En una reacción de doble desplazamiento, los iones catiónicos y aniónicos de dos compuestos se intercambian. En la reacción \(Pb(NO_3)_4 + NaCl\), el catión \…
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balance the following equation?al + ?cuso4 → ?al2(so4)3 + ?cu, using th…
2. 3
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when the equation alcl3 + h2so4 → al2(so4)3 + hcl is balanced, the coef…
2. 6
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4. balance equation 127 10 pts possible balance the equation nh₃ + o₂ →…
1. 5
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5. predicting products 1 10 pts possible what type of reaction will occ…
3. Synthesis, NaCl
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what will be the products and reaction type for the following: c₆h₁₂o₆ …
3. \(CO_{2}+H_{2}O\), Combustion
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1. balancing equations 1 10 pts possible _h₂ + _o₂ → _h₂o 1. 1,2,1 2. 2…
3. 2,1,2
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9. how would an increase in temperature affect the equilibrium of an ex…
9. a. equilibrium shifts left 10. a. equilibrium shifts left
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a food described as ___ must be grown without the use of any fertilizer…
organic
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procedure: for each molecule in the table below, list the number of tot…
| Molecule | Valence Electrons | Lewis Structure | |--|--|--| | \(NH_3\) | \(8\) | \(\ce{H - \underset{\overset{\ce{H}}{\mid}}{N} - H}\) (with a lone pair on N) | | \(HCl\) | \(8\…
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select the correct answer. when creating their plates, maddie makes sur…
A. The etchant is acidic.
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select the correct answer. when franco walks into his studio, he notice…
A. Any chemicals exposed to air that may create noxious fumes
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1. how many ml of a 6.00 ppm solution are needed to make 4.00 l of a 0.…
\(V_{C} = 66.7\space mL\)
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an environmental chemist found 2.4 x 10^{-2}g of a pesticide in 2.00 l …
1. \(H\), \(JJ\), \(S\) 2. \(H\), \(BB\), \(S\), \(E\)
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how many grams of water in 500. g of a 0.100 % m/m nacl solution ? __1_…
1. JJ. \(0.100\) 2. U. \(0.500\) 3. AA. \(100\) 4. O. \(500.0\) 5. U. \(0.500\) 6. V. \(499.5\)