Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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1 multiple choice 2 points what is the answer, with the correct number …
109.30 g ---
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4. when two nonpolar molecules are compared, we should consider the num…
1. Question 4: Butane, $\text{C}_4\text{H}_{10}$ 2. Question 5: Butane has the greatest number of electrons of the three molecules, making it the most polarizable. More polarizabl…
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the truth about tobacco what is in tobacco? a single puff of cigarette …
### What Is In Tobacco? NICOTINE: **addictive stimulant** drug found in **tobacco** CARBON MONOXIDE: A **colorless, odorless**, poisonous **gas** produced when tobacco burns. TAR:…
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determining charge an element becomes a positively charged ion when it …
loses electrons.
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practice: 5. explain the difference between physical properties and che…
- **Physical Properties**: Characteristics observable without changing the substance's chemical composition. Examples: Density ($\frac{\text{mass}}{\text{volume}}$), color, meltin…
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which sentence contains a metaphor? ○ the track star ran the race as fa…
B. The basketball player was a giant next to the small boy.
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explain. 8. can two atoms of the same element ever have different atomi…
No, two atoms of the same element cannot have different atomic numbers. The atomic number is the number of protons in an atom's nucleus, and this number uniquely defines an elemen…
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an element with mass 640 grams decays by 7.3% per minute. how much of t…
360.4 grams
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the electro-magnetic connectionhow do electromagnets work?what do a wre…
1. A length of conductive (usually copper) wire, a piece of metal, and a source of electricity. 2. When current is introduced, it flows through the wire, creating a magnetic field…
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part: 1 / 2 part 2 of 2 what would happen to the molarity of the soluti…
The molarity of the solution in the flask would be lower than the calculated value.
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select the single best answer for each part. part: 0 / 2 part 1 of 2 af…
Use a funnel through which the solid is poured into the flask, then rinse the funnel to ensure all is added to the flask.
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select the single best answer for each part.part: 0 / 2part 1 of 2after…
Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
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part: 0 / 2 part 1 of 2 after measuring the mass of a solid in a weighi…
Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
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after measuring the mass of a solid in a weighing vessel, what are the …
○ Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
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use the diagrams below to answer questions 1- 3.propanemethanoic acid1.…
1. | Substance | Boiling Point | Intermolecular Attractive Force(s) | |-----------------|---------------|-------------------------------------| | Propane | 229 K | London dispersi…
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an oxygen atom picks up two additional, free-floating electrons. is the…
Negative
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which characteristic increases the rate of a solute dissolving in a sol…
D. stirring solutions
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four students in a class explained how the size of the solute or temper…
Sophia and Christian
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i am a noble gas. i can be found in the same period as the lightest of …
Argon (Ar)
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the amount and ability of substance that can be dissolved by another su…
Solubility
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having problems staying logged in or are you experiencing issues? pleas…
Sodium (Na)
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a physical law that states that matter is not created or destroyed duri…
Law of Conservation and Mass
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word:with prefix meaning \same\ used to describe solutionssiftingsolute…
homogeneous
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a method of separation that changes a liquid to a gas leaving behind di…
C. Evaporation
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3. 4 for each statement, write whether each describes a generic drug or…
### Question 3: 1. Generic 2. Brand-name 3. Brand-name 4. Both ### Question 4: You should not mix Tylenol with alcohol. Alcohol inhibits the liver's ability to metabolize acetamin…
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method used to sort liquids from non liquids usually done using a filte…
B. Filtration
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words used to tell how strong a solution is based on the amount of solu…
D. Concentration
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method of sorting object by buoyancy (ability to sink or float in water…
A. flotation
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chasity whitney chapter 8 summarize the situation with the wood and the…
### VOCABULARY - censure: To criticize harshly - conciliatory: Intended to make peace - machinations: Schemes, often sneaky ones - skulking: Hiding or moving secretly - unscathed:…
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a student combines water and salt in beaker a and combines sand and soi…
Beaker A contains a solution, and beaker B contains a mixture.
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a chef mixes oil and water in a bowl to make a salad dressing. what wil…
The oil and water will remain separate in the bowl and create a mixture.
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a teacher mixes salt and gravel in a bowl of water and stirs the mixtur…
The provided model is incorrect. A correct model would: 1. First show the removal of all gravel (diamond symbols) from the mixture of salt, water, and gravel. 2. Then show the rem…
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a student makes four mixtures and records his observations in a table. …
The salt is soluble in water.
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a teacher demonstrates an activity to show how different objects intera…
Sugar dissolves in water, and sawdust floats on water.
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lemonade is made by dissolving sugar and lemon juice in water. water is…
Lemonade is a mixture, and water is a compound.
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ntinued)organize the information on atomic mass to complete the outline…
## B. Atomic mass unit 1. Defined as $\frac{1}{12}$ mass of carbon-12 atom 2. Equals $1.6605 \times 10^{-24}$ grams 3. 1 proton/neutron ≈ 1 atomic mass unit ## C. Protons 1. Posit…
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ntinued)organize the information on atomic mass to complete the outline…
## B. Atomic mass unit 1. Defined as $\frac{1}{12}$ mass of carbon-12 atom 2. Equals $1.6605 \times 10^{-24}$ grams 3. 1 proton/neutron ≈ 1 atomic mass unit ## C. Protons 1. Posit…
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having problems staying logged in or are you experiencing issues? pleas…
Sodium (Na)
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determining charge an element becomes a positively charged ion when it …
loses electrons.
-
practice: 5. explain the difference between physical properties and che…
- **Physical Properties**: Characteristics observable without changing the substance's chemical composition. Examples: Density ($\frac{\text{mass}}{\text{volume}}$), color, meltin…
-
which sentence contains a metaphor? ○ the track star ran the race as fa…
B. The basketball player was a giant next to the small boy.
-
an element with mass 640 grams decays by 7.3% per minute. how much of t…
360.4 grams
-
the electro-magnetic connectionhow do electromagnets work?what do a wre…
1. A length of conductive (usually copper) wire, a piece of metal, and a source of electricity. 2. When current is introduced, it flows through the wire, creating a magnetic field…
-
part: 1 / 2 part 2 of 2 what would happen to the molarity of the soluti…
The molarity of the solution in the flask would be lower than the calculated value.
-
select the single best answer for each part. part: 0 / 2 part 1 of 2 af…
Use a funnel through which the solid is poured into the flask, then rinse the funnel to ensure all is added to the flask.
-
select the single best answer for each part.part: 0 / 2part 1 of 2after…
Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
-
part: 0 / 2 part 1 of 2 after measuring the mass of a solid in a weighi…
Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
-
after measuring the mass of a solid in a weighing vessel, what are the …
○ Pour the solid from the weighing vessel directly into the flask, then rinse the weighing vessel to ensure all residual solid is added to the flask.
-
use the diagrams below to answer questions 1- 3.propanemethanoic acid1.…
1. | Substance | Boiling Point | Intermolecular Attractive Force(s) | |-----------------|---------------|-------------------------------------| | Propane | 229 K | London dispersi…
-
an oxygen atom picks up two additional, free-floating electrons. is the…
Negative
-
which characteristic increases the rate of a solute dissolving in a sol…
D. stirring solutions
-
four students in a class explained how the size of the solute or temper…
Sophia and Christian
-
i am a noble gas. i can be found in the same period as the lightest of …
Argon (Ar)
-
the amount and ability of substance that can be dissolved by another su…
Solubility
-
a physical law that states that matter is not created or destroyed duri…
Law of Conservation and Mass
-
word:with prefix meaning \same\ used to describe solutionssiftingsolute…
homogeneous
-
a method of separation that changes a liquid to a gas leaving behind di…
C. Evaporation
-
3. 4 for each statement, write whether each describes a generic drug or…
### Question 3: 1. Generic 2. Brand-name 3. Brand-name 4. Both ### Question 4: You should not mix Tylenol with alcohol. Alcohol inhibits the liver's ability to metabolize acetamin…
-
method used to sort liquids from non liquids usually done using a filte…
B. Filtration
-
words used to tell how strong a solution is based on the amount of solu…
D. Concentration
-
method of sorting object by buoyancy (ability to sink or float in water…
A. flotation
-
chasity whitney chapter 8 summarize the situation with the wood and the…
### VOCABULARY - censure: To criticize harshly - conciliatory: Intended to make peace - machinations: Schemes, often sneaky ones - skulking: Hiding or moving secretly - unscathed:…
-
a student combines water and salt in beaker a and combines sand and soi…
Beaker A contains a solution, and beaker B contains a mixture.
-
a chef mixes oil and water in a bowl to make a salad dressing. what wil…
The oil and water will remain separate in the bowl and create a mixture.
-
a teacher mixes salt and gravel in a bowl of water and stirs the mixtur…
The provided model is incorrect. A correct model would: 1. First show the removal of all gravel (diamond symbols) from the mixture of salt, water, and gravel. 2. Then show the rem…
-
a student makes four mixtures and records his observations in a table. …
The salt is soluble in water.
-
a teacher demonstrates an activity to show how different objects intera…
Sugar dissolves in water, and sawdust floats on water.
-
lemonade is made by dissolving sugar and lemon juice in water. water is…
Lemonade is a mixture, and water is a compound.
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 time remaini 57:55 h₂o…
from a gas to a liquid
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 58:16 i…
solid turns directly into a gas, matching the description. - Evaporation is liquid to gas, freezing is liquid to solid, deposition is gas to solid, so they do not fit.
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phase changes quiz complete 1 2 3 4 5 6 7 8 9 10 the diagram below show…
A. Molecules are speeding up as boiling occurs.
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2) what is the percent yield of the reaction below if 84.0 grams of $\t…
80.8%
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in this reaction: $ce{mg(s) + i_{2}(s) -> mgi_{2}(s)}$ if 10.0 g of mg …
Approximately 84.5%
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writing formulas ( criss-cross method)directions: write the formulas of…
| | $\text{F}^-$ | $\text{O}^{2-}$ | $\text{N}^{3-}$ | $\text{S}^{2-}$ | $\text{SO}_4^{2-}$ | |--|--|--|--|--|--| | $\text{Fe}^{3+}$ | $\text{FeF}_3$ | $\text{Fe}_2\text{O}_3$ | $…
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ionic bonding 6.1-6.3 test directions: using a periodic table, fill in …
| Number of Protons (+) | Number of Electrons (-) | Overall charge | Symbol and Charge | Cation (C) Anion (A) Neutral (N) | |------------------------|--------------------------|--…
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1 pointthe smoke inhaled from a burning cigarette contains a mix of ove…
1. 7000 2. 70 3. Melanoma
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name: homework phosphorus trichloride is a slightly yellow fuming liqui…
Lewis dot diagram for $\text{PCl}_3$: ``` .. :Cl:P:Cl: .. :Cl: .. ``` (Note: The central P has one lone pair, each Cl has three lone pairs, and single bonds connect P to each Cl.)…
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baking soda, or sodium bicarbonate, is used in baking to ______ foods l…
D. encourage
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baking soda, an alkaline chemical formula, is used in baking to make ca…
D. achieve
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if human minds were as uniform as atoms of the same elements or molecul…
C. predictable
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the third type of chemical bonding, metallic bonding, occurs between me…
- Valence electrons move freely throughout a metal. - Metallic bonding occurs between metal atoms.
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1 point cigar users cannot be exposed to nicotine because they dont ful…
1. False 2. True 3. False
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chemistry resources ionic compounds can be represented by bohr model di…
A. A sodium cation has zero valence electrons. C. Both the Bohr model and the Lewis dot structure represent an ionic bond between a metal and a nonmetal. D. Valence electrons are …
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solids and plasmas quiz complete 1 2 3 4 5 6 7 8 9 10 which best explai…
cannot be pushed closer together, making the crystal incompressible. The other options are incorrect: solid molecules vibrate in place (so A is wrong), crystal molecules do not ac…
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chemistry resources covalent compounds can be represented by bohr model…
- There are two bonding electrons in a chlorine molecule. - A chlorine molecule has 14 total valence electrons.
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there are three types of chemical bonds: covalent, ionic, and metallic.…
A covalent bond forms between two **nonmetal** chlorine atoms. Before reacting, each chlorine atom has **7** valence electrons. When **2** electrons are shared, each chlorine atom…
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sodium metal (na), chlorine gas ($cl_2$) and table salt (nacl) have dif…
- electrons are transferred: bonds in table salt - electrons are shared: bond in chlorine gas
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1. $\boldsymbol{agno_2}$ |element|atoms|mass|total| | ---- | ---- | ---…
### $\text{AgNO}_3$ | Element | Atoms | Mass (g/mol) | Total (g/mol) | |---------|-------|--------------|---------------| | Ag | 1 | 107.87 | $1 \times 107.87 = 107.87$ | | N | 1 …
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1) what is the term for something that attaches dye molecules to textil…
1) A mordant is the substance 2) Iron produces dull, dark colors and can weaken fibers. 3) To remove impurities, concentrate active components, and ensure consistent, effective dy…
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when two atoms with different electronegativities form a bond, the more…
When sulfur and oxygen react, valence electrons are **shared** between the atoms because their EN difference is **less than** two. When magnesium and oxygen react, valence electro…
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chemistry resources when forming chemical bonds, metal atoms tend to lo…
- In general, metal atoms have lower electronegativities than nonmetal atoms. - When sulfur bonds to oxygen, electrons are more strongly attracted to the oxygen atom. - Atoms with…
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multiple choice questions 1. which process occurs in the suns core to r…
1. C. Nuclear fusion 2. B. Stellar life span model 3. C. Evidence of nuclear fusion and energy output 4. B. It began as a single, dense point and has been expanding ever since.
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chemical bonds form when atoms share valence electrons or when one atom…
- Oxygen atoms tend to gain or share electrons when forming chemical bonds. - Magnesium atoms tend to lose electrons when forming chemical bonds. - Atoms with three or fewer valen…
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empirical and molecular formula calculation propene has an empirical fo…
$\text{C}_3\text{H}_6$
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making activity series predictions think about it use the activity seri…
Ca₃(PO₄)₂ + Zn
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making activity series predictions use the activity series below to pre…
1. $\text{CCl}_4 + \text{Br}_2$: no reaction 2. $\text{FeSO}_4 + \text{Na}$: $\text{Na}_2\text{SO}_4 + \text{Fe}$
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is an example of○ energy transformation○ law of conservation of energy○…
- Incomplete top question: Cannot be answered without the referenced scenario. - Energy type question: A. Chemical - Mass conversion question: 0.625 kg (the corresponding option, …
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select the correct answer a chemist is performing an experiment by obse…
C. from hour 0 to hour 5
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making activity series predictions use the activity series below to pre…
no reaction
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use the activity series below to predict the products of each of the fo…
1. $\text{Na}_2\text{CO}_3 + \text{K} ightarrow \text{K}_2\text{CO}_3 + \text{Na}$ 2. $\text{ZnCl}_2 + \text{Cu} ightarrow \text{no reaction}$