化學
化學反應、化學計量、分子結構與元素性質。
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classifying matter matter mixture compound ______ solution heterogeneou…
- The first blank (under Matter, next to Compound) : $\boldsymbol{Element}$ - The second blank (the middle branch) : $\boldsymbol{Pure\ Substance}$ (And the classification of each…
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question 7 0.5 pts sometimes when i have my morning coffee, which i dri…
A. Hydrophobic substance
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quiz instructions make sure youve read through all of the background in…
A. 4
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quiz instructions make sure youve read through all of the background in…
The correct option is the one labeled with "4" (assuming the last option is 4, e.g., if the options are A. 1, B. 2, C. 3, D. 4, then the answer is D. 4).
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mixture. if it is compound. if it geneous. pure substance or mixture? e…
To analyze the given diagrams (assuming we need to verify or explain the classifications): ### 1. First Diagram (Green and Brown Spheres) - **Pure Substance/Mixture**: Mixture (tw…
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pure substance or mixture? element, compound, homogeneous or heterogene…
To analyze each case, we use the definitions of pure substances (elements, compounds) and mixtures (homogeneous, heterogeneous): ### 1. First Diagram - Contains different types of…
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use table s & i to help you 5. a 10.0 cm³ sample of aluminum will have …
s: 5. The mass of the 10.0 cm³ aluminum sample is $\boldsymbol{27.0\ \text{g}}$. 6. The volume of the 10.0 gram aluminum sample is approximately $\boldsymbol{3.70\ \text{cm}^3}$.
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columns and rows with diagrams (particles/molecules) and labels: \mixtu…
To solve this, we analyze each row based on particle diagrams and classification (pure substance, mixture; homogeneous, heterogeneous, element, compound): ### Row 1 (Three identic…
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the propensity to resolve discrepancies between pre-existing schemas an…
4) assimilation bias
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eo ep eq pure substance compound mixture homogeneous mixture heterogene…
For the last row: - EP (category): pure substance - EQ (category): compound
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question 9 (4 points) draw the bohr model for neon on your own paper an…
Blank 1: Neon Blank 2: 10 Blank 3: 20 Blank 4: 10 Blank 5: 10 Blank 6: 10 Blank 7: 2 Blank 8: 8
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basketball blues raquel lindell looking at the hard, plaster cast that …
C. Coach tried to sound supportive and encouraging, but Jillian knew that in her mind she was already reworking the entire offense of the team without one of her star athletes.
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pure... my ature? homogeneous or heterogeneous? mixture heterogeneous m…
mixture, heterogeneous
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question 8 (4 points) draw the bohr model for calcium on your own paper…
Blank 1: Calcium Blank 2: 20 Blank 3: 40 Blank 4: 20 Blank 5: 20 Blank 6: 20 Blank 7: 4 Blank 8: 2
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pure substance or mixture? compound homogeneous or heterogeneous? mixtu…
mixture, homogeneous
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part ii - looking in the periodic table 1 read the hidden informational…
To solve these problems, we need to find the elemental symbols for each element in the list and then combine them to form a word related to the clue. Let's take the first example …
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question 7 (4 points) draw the bohr model for magnesium on your own pap…
Blank 1: Magnesium Blank 2: 12 Blank 3: 24 Blank 4: 12 Blank 5: 12 Blank 6: 12 Blank 7: 3 Blank 8: 2
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question 6 (4 points) use the following bohr model and your periodic ta…
Blank 1 (Element name): Lithium Blank 2 (Atomic #): 3 Blank 3 (Atomic mass (rounded)): 7 Blank 4 (# of protons): 3 Blank 5 (# of neutrons): 4 Blank 6 (# of electrons): 3 Blank 7 (…
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25) over the past several decades, some of the positive health habits t…
C. Avoiding locally grown
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1. the 3 particles of the atom are: a. _______________ b. _____________…
a. Proton b. Neutron c. Electron Their respective charges are: a. Positive (+) b. Neutral (0) c. Negative (-) ### Question 2
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question 5 (4.points) use the following bohr model and your periodic ta…
Blank 1: Magnesium Blank 2: 12 Blank 3: 24 Blank 4: 12 Blank 5: 12 Blank 6: 12 Blank 7: 3 Blank 8: 2
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period: 9-11-2029 directions: put a check mark in either the physical o…
To solve this, we recall: - **Physical properties**: Observable/measurable without changing the substance’s chemical identity (e.g., color, density, mass, state, texture, smell, v…
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directions: write a p for physical if the example below is a physical c…
To solve this, we determine if each change is physical (no new substance, just form/state change) or chemical (new substance formed, often with reactions like gas, heat, color cha…
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question 4 (4 points) use the following bohr model and your periodic ta…
Blank 1: Carbon Blank 2: 6 Blank 3: 12 Blank 4: 6 Blank 5: 6 Blank 6: 6 Blank 7: 2 Blank 8: 4
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question 3 (4 points) use the following bohr model and your periodic ta…
Blank 1: Sodium Blank 2: 11 Blank 3: 22 Blank 4: 11 Blank 5: 11 Blank 6: 11 Blank 7: 3 Blank 8: 1
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part b - looking in the periodic table 1) read the bolded informational…
SPONGE (from S, P, O, N, Ge) ### 2) If you have this, you might win the lottery. Lutetium, carbon, potassium.
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question 2 (4 points) use the following bohr model and your periodic ta…
Blank 1: Aluminum Blank 2: 13 Blank 3: 27 Blank 4: 13 Blank 5: 14 Blank 6: 13 Blank 7: 3 Blank 8: 3
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basketball blues raquel lindell looking at the hard, plaster cast that …
C. Coach tried to sound supportive and encouraging, but Jillian knew that in her mind she was already reworking the entire offense of the team without one of her star athletes.
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basketball blues raquel lindell looking at the hard, plaster cast that …
C. Coach tried to sound supportive and encouraging, but Jillian knew that in her mind she was already reworking the entire offense of the team without one of her star athletes.
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when the brain rewires connections in response to a need for change, it…
D. adaptability
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basketball blues raquel lindell looking at the hard, plaster cast that …
C. Coach tried to sound supportive and encouraging, but Jillian knew that in her mind she was already reworking the entire offense of the team without one of her star athletes.
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part 4: multi-select: select all answers that are correct by placing an…
- Melting: X - Boiling: X ### Question 17
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question 10 (3 points) the isotope carbon-14 has the following subatomi…
Blank 1: 6 Blank 2: 8 Blank 3: 6
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question 9 (3 points) the isotope neon-22 has the following subatomic p…
Blank 1: 10 Blank 2: 12 Blank 3: 10
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name ____________ date ___________ period ____ states of matter and ene…
Solid (place "X" next to "Solid") ### Question 12
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question 8 (3 points) a neutral atom of aluminum (al) has the following…
Blank 1: 13 Blank 2: 14 Blank 3: 13
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question 7 (3 points) a neutral atom of sodium (na) has the following s…
Blank 1: 11 Blank 2: 12 Blank 3: 11
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question 6 (1 point) if an atom has 3 protons, 4 neutrons, and 3 electr…
c. 7
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which of the following best describe gas particles? select all that app…
a. moving randomly, b. collide into each other, d. high kinetic energy
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4. live lab: go back to the lab area and accurately record measurements…
50 mL (example, replace with actual measurement) ### Part b: Beaker
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sun spectrum data. table with elements h, he, ca, li, na, mg, fe, ne (p…
Elements present in the Sun’s spectrum (marked with ×) are: H, He, Li, Na, Mg, Fe, Ne. Element not present: Ca. (If focusing on the first "Present" row: H, He; and third row: Li, …
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she walks in beauty george gordon byron she walks in beauty, like the n…
C. 6 line stanzas in an abbabb rhyme scheme
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directed reading a 9. all of the following remain constant for charles’…
c. the volume of the gas. ### Question 10
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3. practice instrument measurements: be as accurate and precise as poss…
First Cylinder: $\boldsymbol{6.6}$ (units, e.g., mL) Second Cylinder: $\boldsymbol{38}$ (units, e.g., mL) Third Cylinder: $\boldsymbol{2.6}$ (units, e.g., mL)
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part 2 refer to the figures below to answer the following questions. 3.…
\( V = \boldsymbol{8.00} \, \text{cm}^3 \) \( V = \boldsymbol{8.00} \, \text{mL} \) ### 3b
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the general term for the amount of matter in a substance or object is ,…
mass
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which statement(s) is/are true about matter? select all that apply a al…
a. All matter has volume. d. All matter has mass.
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which piece of lab equipment measures the volume of a liquid? a graduat…
a. graduated cylinder
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which of the following is an example of a question a social scientist m…
C. How did the migration of humans from rural to urban areas impact a local environment?
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35 br bromine 79.904 atomic # = ____ atomic mass = ____ # of protons = …
Atomic # = 35 Atomic Mass = 79.904 # of Protons = 35 # of Neutrons = 45 (since \( 80 - 35 = 45 \), after rounding atomic mass to 80) # of Electrons = 35
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11. read each statement and decide if it is true or false: a. the labor…
False ### b.
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1. define matter. why is it hard to completely define it? 2. contrast p…
Matter: Anything with mass and volume. Hard to define fully due to diverse forms (e.g., subatomic, dark matter) and evolving scientific understanding. ### Question 2
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parts of an atom worksheet complete the following table for each atom. …
To solve the "Parts of an atom worksheet", we use the following concepts: - **Atomic Number (Z)**: Number of protons (and electrons in a neutral atom). - **Atomic Mass (A)**: Sum …
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you could also measure the object’s volume, or the space it occupies. c…
a. Condensation #### b. Molten steel hardens.
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10. what is a solid? 11. how are the particles in a crystalline solid a…
A solid is a state of matter with a definite shape and volume, where particles are closely packed and vibrate in fixed positions (e.g., ice, rock, metal). ### Question 11: How are…
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question 2 which of the following statements describes the main purpose…
B. to study the interaction between humans and the environment
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pka = 9.76 (chemical structure with \\(\\stackrel{\\oplus}{\\text{nh}_3…
D. $\ce{NH_3^+}$ -containing and $\ce{COO^-}$ -containing structure (the structure in option D)
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please review information in modules 1a and 1c before attempting the as…
D. share one or more pairs of electrons with each other. (Assuming the last option is labeled D; if the original options had labels like A, B, C, D with the last being D, else adj…
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16 s 32.06 atomic # = \\underline{16} mass = \\underline{\\quad} # of p…
Atomic # = 16 Mass = 32.06 # of Protons = 16 # of Neutrons = 16 # of Electrons = 16
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16 s 32.06 atomic # = ____ atomic mass = ____ # of protons = ____ # of …
Atomic # = 16 Atomic Mass = 32.06 # of Protons = 16 # of Neutrons = 16 # of Electrons = 16
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5 b 10.81 atomic # = ____ atomic mass = ____ # of protons = ____ # of n…
- Atomic # (Protons) = 5 - Atomic Mass = 10.81 (or 11 for neutron calc) - # of Protons = 5 - # of Neutrons = 6 (11 - 5) - # of Electrons = 5
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7. fill in the following table. name | symbol | z | a | #p | #e | #n | …
### Problem 7: #### Explanation: The isotopic symbol is written as $\ce{^A_Z X}$, where \( A \) is the mass number, \( Z \) is the atomic number, and \( X \) is the symbol of the …
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fill in the missing words o₂ is the chemical formula for elemental ____…
\( O_2 \) is the chemical formula for elemental \(\boldsymbol{\text{oxygen}}\), \( N_2 \) is the chemical formula for elemental \(\boldsymbol{\text{nitrogen}}\), \( H_2 \) is the …
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7. fill in the following table. | name | symbol | z | a | #p | #e | #n …
### Problem 7 # Explanation: ## Step 1: Recall Isotopic Symbol Format The isotopic symbol is written as $\ce{^{A}_{Z}X}$, where \( X \) is the symbol, \( Z \) is atomic number, \(…
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a student drew models for two forms of matter, matter a and matter b, a…
- Matter A: **Mixture** (because it contains two or more distinct types of particles/molecules (black single atoms and yellow diatomic molecules) that are physically mixed, not ch…
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fill in the missing words use the periodic table to answer this questio…
potassium - 39
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the elements that make up table salt are sodium and chlorine. how can t…
First blank: B. different Second blank: C. combine Third blank: A. unique
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how could molecules of compounds in a model of a homogeneous mixture be…
D. Move the molecules around so that one compound is clustered together, and the other compound is clustered together with only a little mixing.
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question 2: true or false: elements are fundamental units composed of a…
True ### Question 3
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alexandra and maddy made an atomic model of a substance as shown. alexa…
Alexandra is correct because there is only one type of atom in each molecule.
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unit 3 - quiz 1. on a counter is a glass of water with ice cubes floati…
The mass of water is approximately \(\boldsymbol{4486\space g}\) (or \(\boldsymbol{4.49\space kg}\)) ### Question 3
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question 5 which of the subatomic particles are found in the nucleus? -…
C. neutrons, D. protons ### Question 6
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which types of matter match the models? move one correct answer to each…
The model represents a **mixture (of compounds)** (or more precisely, a mixture of two different compounds, since there are two distinct molecular types). If answer choices includ…
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true or false: the behavior of an atom is mostly determined by the numb…
True ### Question 9:
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question 12 1 pts consider the following reaction: 2 h₂ + o₂ -> 2h₂o in…
First [Select]: reactants; Second [Select]: product ### Question 13
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question 15 we make a glass of kool - aid by dissolving some flavored p…
Flavored powder is the solute, water is the solvent. ### Question 16
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fill in the missing words out of the following five elements, calcium, …
First blank: sodium; Second blank: calcium
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question 18 which of the following statements is (are) true regarding w…
- The electrons are in the valence shell of oxygen more than the valence shell of hydrogen. - The oxygen has a partial negative charge and the hydrogen has a partial positive char…
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chemistry vocabulary across 4. this chemistry is the study of the compo…
MATTER (For other clues, follow similar logic with chemistry definitions. For example, Down 1: “Inorganic” (study of non - carbon chemicals), Across 4: “Analytical” (study of matt…
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what change of energy occurs between the steam generator and the turbin…
C. Thermal energy is converted into mechanical energy.
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fill in the missing words the element has several isotopes. one of the …
Iron (or Fe)
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what is the correct chronological order of scientists contributing to t…
B. Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley ### Second Question (Property No Longer Used):
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fill in the missing words the atomic number of a cobalt-59 isotope is .…
The atomic number of a cobalt - 59 isotope is \( 27 \). The mass number is \( 59 \), the number of protons is \( 27 \), the number of electrons is \( 27 \), the number of neutrons…
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the energy derived from the digestion of food is ______. a. kinetic ene…
D. chemical energy
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6. the ionic radius of p³⁻ is larger than the atomic radius of p becaus…
\( P^{3 - } \) has gained 3 electrons, increasing electron - electron repulsion and decreasing effective nuclear charge on outer electrons, so the electron cloud expands. ### Ques…
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1. the following measurements were made to determine the density of a m…
a. The results have low accuracy as they are all below the handbook value (1.24 g/mL). b. The results have high precision as the measured values are consistent (differences ≤0.02 …
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ssessment. 1. the element lead has four known isotopes. using the formu…
The average atomic mass of lead is approximately \(207.218\)
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ty physics accuracy & precision worksheet module 01 accuracy: refers to…
a. The results have low accuracy as measured values are not close to the target 1.24 g/mL. b. The results have high precision as measurements are reproducible with small differenc…
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question 1 (1 point) examples of pure oils are palm kernel oil and hydr…
False
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complete the sentence with the pronoun that agrees with the word or wor…
It
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2. the element sulfur has three known isotopes. complete the question a…
The average atomic mass of sulfur is approximately \( 32.06 \) (or more precisely \( 32.0645 \))
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select the correct answer. what is the greatest difference between ben …
B. tone
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e) the 4$^{th}$ period alkaline earth metal: symbol , name .
Symbol: $\text{Ca}$, Name: Calcium
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5. using your knowledge of ionic transfer of electrons, draw a lewis di…
### Lewis Diagram of \(BH_3\): - Central B atom with 3 single bonds to H atoms. Each bond is a pair of electrons. B has 6 valence electrons (3 bonds), and each H has 2 valence ele…
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look at the table of density data for an unknown substance. based on th…
B) 29.7g
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use the following bohr model and your periodic table to fill in the bla…
Atomic #: $\boldsymbol{13}$ Atomic mass (rounded): $\boldsymbol{27}$ # of protons: $\boldsymbol{13}$ # of neutrons: $\boldsymbol{14}$ # of electrons: $\boldsymbol{13}$ # of energy…
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the accepted value for a quantity is 5.67 g. if the measured value is 5…
A) 3.74%
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4. using charles’ gas law, solve the following problem: a gas occupies …
The new volume of the gas is approximately \( 1.88 \) liters.
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in this excerpt from annus mirabilis, john dryden speaks about london a…
The section "Methinks already from this chemic flame, I see a city of more precious mould; Rich as the town which gives the Indies name, With silver paved, and all divine with gol…
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3. using the gay-lussac formula for gases, solve the following problem:…
The pressure at 400 degrees Celsius will be approximately \( 1.51\,\text{atm} \) (or more precisely \( 1.512\,\text{atm} \)).