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Algae are a diverse group of photosynthetic organisms that live in aquatic environments. They come in many different shapes and sizes and can be single-celled or multi-cellular. Algae play an important role in aquatic ecosystems and are a vital part of the ocean's food chain.
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Ch8 balance equations vocab
This document provides vocabulary terms for different types of chemical reactions:
1) Precipitate refers to the chunky stuff that falls to the bottom of a test tube in a double replacement reaction.
2) Decomposition reactions involve ABC yielding A + B + C, while synthesis reactions involve AB + CD yielding AD + CB.
3) Double replacement reactions involve AB + C yielding AC + B, while single replacement reactions involve AB + C yielding AC + B and both B and C must be nonmetals.
Practice pics
This document asks several questions about an unknown organism, inquiring about its common name, what the dark spots and green stuff are, and what the moving thing is. It also states that the group of protists this organism belongs to is called _________, and asks for the common names of several organisms.
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Solutions can be either homogeneous, with particles distributed evenly throughout, or heterogeneous, with particles distributed unevenly. Solutions are homogeneous mixtures. Factors that affect the solubility of substances in solutions include the nature of the solute and solvent, temperature, and pressure. The rate of dissolution of a substance is affected by stirring, the amount of solute already dissolved, the size of solute particles, and temperature.
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Acid base vocab review
The document discusses acids and bases, including:
- Acids dissociate in water, producing H+ ions. Strong acids fully dissociate while weak acids only partially dissociate.
- The pH scale measures acidity and basicity on a scale from 0-14, with lower values being more acidic and higher more basic. Common pH values include lemons at 3 and lakes around 7.
- Buffers resist changes in pH. The main buffer in human blood is bicarbonate, maintaining a pH of 7.25-7.35.
Organic chemistry the chemistry of carbon.
This document provides an overview of organic chemistry concepts including:
- Naming common alkanes from methane to decane and stating their molecular formulas.
- Explaining the properties of the first four alkanes (methane to butane) including their 3D structure, nonpolar nature, and state of matter at room temperature due to intermolecular van der Waals forces.
- Detailing how butane lighters work by keeping the butane pressurized in its liquid state above its normal boiling point of -31°F and why they don't work as well in cold temperatures.
Arkiver til alle, på vej ind i et nyt decennium: kommunikation, kreativitet, ...
Bente Jensens oplæg til Vårkonference i NCK, Østersund, 10. februar 2011
Recommended
Ch8 balance equations vocab
This document provides vocabulary terms for different types of chemical reactions:
1) Precipitate refers to the chunky stuff that falls to the bottom of a test tube in a double replacement reaction.
2) Decomposition reactions involve ABC yielding A + B + C, while synthesis reactions involve AB + CD yielding AD + CB.
3) Double replacement reactions involve AB + C yielding AC + B, while single replacement reactions involve AB + C yielding AC + B and both B and C must be nonmetals.
Practice pics
This document asks several questions about an unknown organism, inquiring about its common name, what the dark spots and green stuff are, and what the moving thing is. It also states that the group of protists this organism belongs to is called _________, and asks for the common names of several organisms.
Solutions
Solutions can be either homogeneous, with particles distributed evenly throughout, or heterogeneous, with particles distributed unevenly. Solutions are homogeneous mixtures. Factors that affect the solubility of substances in solutions include the nature of the solute and solvent, temperature, and pressure. The rate of dissolution of a substance is affected by stirring, the amount of solute already dissolved, the size of solute particles, and temperature.
Data Driven Dialogue
This document outlines a four-phase process for data-driven dialogue: 1) Participants predict survey results on standards and questions, rating agreement levels. 2) Teams visualize the survey data in graphics. 3) Participants objectively observe and record statements about direct facts from the data. 4) For each observation, participants infer meanings or questions raised, and discuss patterns, surprises, and new questions from the data.
Acid base vocab review
The document discusses acids and bases, including:
- Acids dissociate in water, producing H+ ions. Strong acids fully dissociate while weak acids only partially dissociate.
- The pH scale measures acidity and basicity on a scale from 0-14, with lower values being more acidic and higher more basic. Common pH values include lemons at 3 and lakes around 7.
- Buffers resist changes in pH. The main buffer in human blood is bicarbonate, maintaining a pH of 7.25-7.35.
Organic chemistry the chemistry of carbon.
This document provides an overview of organic chemistry concepts including:
- Naming common alkanes from methane to decane and stating their molecular formulas.
- Explaining the properties of the first four alkanes (methane to butane) including their 3D structure, nonpolar nature, and state of matter at room temperature due to intermolecular van der Waals forces.
- Detailing how butane lighters work by keeping the butane pressurized in its liquid state above its normal boiling point of -31°F and why they don't work as well in cold temperatures.
Arkiver til alle, på vej ind i et nyt decennium: kommunikation, kreativitet, ...
Bente Jensens oplæg til Vårkonference i NCK, Østersund, 10. februar 2011
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- Isotopes of oxygen weigh more than others because they contain different numbers of neutrons.
- S P D and F letters are used in electron configurations.
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The document discusses the chemical equation for iron rusting, which is 4Fe + 3O2 → 2Fe2O3. This equation states that 4 moles of iron and 3 moles of oxygen react to form 2 moles of rust. It also provides the molecular masses of iron, oxygen, and rust in grams. The document repeats this information multiple times.
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Online solutions
This document provides definitions and explanations of key concepts related to solutions and solubility including:
- Saturated means a solution is holding as much solute as possible. Unsaturated means it is not holding as much as possible.
- Molarity (M) refers to moles of solute per liter of solution. Higher molarity means a more concentrated solution.
- False statements include: water is the only solvent, a saturated solution must be concentrated, and a very dilute solution must be unsaturated.
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Day one intro
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1) Batteries produce voltage through redox reactions that occur at the anode and cathode. The anode undergoes oxidation, releasing electrons, while the cathode undergoes reduction, gaining electrons.
2) The voltage of a battery depends on standard conditions like temperature and concentration - lower temperatures and concentrations result in lower voltages.
3) Key units include the coulomb (amount of charge), amp (coulombs/second of current), volt (joules/coulomb of potential difference), and Faraday constant (coulombs in a mole of electrons).
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The document discusses the process of electroplating, where electricity is used to coat a metal object with a thin layer of a different metal. It provides an example of electroplating a key with gold by running an electric current between a gold electrode and the key submerged in a solution containing gold ions. It then shows calculations to determine how long in seconds the process would need to run if using a 20 amp electricity source to plate 3 grams of gold from the solution onto the key.
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The document contains a series of chemistry questions and multiple choice answers about chemical reactions and stoichiometry. This includes questions about the meaning of coefficients in a chemical equation, calculating products of a reaction given moles of reactants, determining the reactant left in excess and leftover amounts after a reaction, identifying an antacid, predicting precipitates from a double displacement reaction, counting oxygen atoms in a molecule, and identifying spectators in a chemical reaction.
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- The 7 SI base units are: mole, kelvin, meter, kilogram, second, ampere, and candela.
- Isotopes of oxygen weigh more than others because they contain different numbers of neutrons.
- S P D and F letters are used in electron configurations.
- 300 degrees Kelvin is equal to 27 degrees Celsius.
Quick pvt review
The document discusses the relationships between pressure, volume, and temperature according to gas laws discovered by scientists like Boyle and Charles. It states that as temperature increases, volume increases and as pressure increases, volume decreases. Standard pressure is given as 1 atmosphere and temperature as 0 degrees Celsius. It also notes that pressure decreases with increasing altitude and is lower on cloudy and snowy days compared to sunny days.
Fish all practice
The document lists various types of fish found in lakes and rivers, including northern pike, muskellunge, smallmouth bass, largemouth bass, bluegill, steelhead, brown trout, brook trout, king salmon, perch, pumpkinseed, rock bass, walleye, lake trout, rainbow trout, blue pike, yellow perch, lake sturgeon, burbot, chinook salmon, johnny darter, ninespine stickleback, emerald shiner, longnose sucker, white sucker, rainbow smelt, slimy sculpin, freshwater drum, splake, lake whitefish, round whitefish, and siscowet.
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The document discusses web accessibility standards for people with disabilities. It covers guidelines for visual elements like images, color, and flashing content. It also discusses coding standards for layout, language identification, and navigation like links and pop-ups. The document provides explanations and examples for each guideline to ensure web content is accessible to users of assistive technologies.
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The document discusses the chemical equation for iron rusting, which is 4Fe + 3O2 → 2Fe2O3. This equation states that 4 moles of iron and 3 moles of oxygen react to form 2 moles of rust. It also provides the molecular masses of iron, oxygen, and rust in grams. The document repeats this information multiple times.
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1) The document discusses the various groups of elements in the periodic table, including their properties and common uses. It covers the s-block (alkali and alkaline earth metals), d-block (transition metals like chromium used in stainless steel), f-block (lanthanides and actinides), and p-block (nonmetals like carbon, metals like aluminum, and noble gases).
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Online solutions
This document provides definitions and explanations of key concepts related to solutions and solubility including:
- Saturated means a solution is holding as much solute as possible. Unsaturated means it is not holding as much as possible.
- Molarity (M) refers to moles of solute per liter of solution. Higher molarity means a more concentrated solution.
- False statements include: water is the only solvent, a saturated solution must be concentrated, and a very dilute solution must be unsaturated.
- True statements include: if you dissolve as much sugar in water as possible, the solution is saturated and concentrated.
Day one intro
Electrochemistry involves the flow of electrons between different metals. Luigi Galvani discovered that frog legs moved when touched with different metals, showing the connection between electricity and biology. Alessandro Volta found that two different metals in contact could generate electricity through the transfer of electrons from one metal to the other. He created the voltaic pile, consisting of alternating zinc and copper discs separated by cardboard soaked in brine, which produced a steady current. Later improvements included the Daniel cell and crowfoot cell, which used zinc and copper electrodes in a liquid electrolyte and were used for telegraph communications until the 1950s.
Day 2 electrochem
1) Batteries produce voltage through redox reactions that occur at the anode and cathode. The anode undergoes oxidation, releasing electrons, while the cathode undergoes reduction, gaining electrons.
2) The voltage of a battery depends on standard conditions like temperature and concentration - lower temperatures and concentrations result in lower voltages.
3) Key units include the coulomb (amount of charge), amp (coulombs/second of current), volt (joules/coulomb of potential difference), and Faraday constant (coulombs in a mole of electrons).
Day 3 electroplating
The document discusses the process of electroplating, where electricity is used to coat a metal object with a thin layer of a different metal. It provides an example of electroplating a key with gold by running an electric current between a gold electrode and the key submerged in a solution containing gold ions. It then shows calculations to determine how long in seconds the process would need to run if using a 20 amp electricity source to plate 3 grams of gold from the solution onto the key.
Double replacement reactions with net ionic and spectators
This document discusses chemical equations and reactions. It explains word equations, formula equations, and ionic equations. Spectator ions that do not participate in the reaction are discussed. An example of a full and net ionic equation for a reaction between zinc fluoride and potassium carbonate is shown, identifying the spectator ions. Predicting products of other reactions is demonstrated.
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The document discusses solubility product constants (KSP) and solubility equilibria. It asks a series of multiple choice questions about what KSP represents, how solubility is affected by various factors like pressure, and how to use the KSP expression and value to determine solubility. The questions cover topics taught by Le Chatelier and Haber including solubility, equilibrium, gas behavior with pressure changes, and using solubility constants.
Keq and le chat practice
Fritz Haber was a famous German chemist who developed a process to synthesize ammonia from nitrogen and hydrogen, allowing for large-scale production of fertilizer to increase crop yields worldwide. He is also known as the "father of chemical warfare" for his work developing chlorine and other poisonous gases during World War I. The document also discusses chemical equilibrium concepts such as calculating solubility from Ksp, determining reaction direction from the reaction quotient Q, and conditions for a reaction being at equilibrium based on comparisons between Q and Keq.
22 ions to know for quiz
Thomas Edison worked hard through many experiments to develop successful inventions. It took him about 100 experiments to create a working light bulb with the right combination of metals and gases. He also conducted around 10,000 experiments to develop a battery that functioned well for providing electrical current. Hard work is necessary to achieve success through trial and error.
Sig figs
Sig Figs (significant figures) refer to the reliable digits in a measurement. A scientist wants to know which digits in a measurement are reliable. When taking a measurement, one should record digits to one place beyond the precision of the measuring device. For example, a ruler precise to the tenths place requires measurements recorded to the hundredths place, like 8.31. The number of significant figures in a value is based on the digits that are reliable - for example, 1,234,000 has 4 significant figures while 12.30 also has 4 significant figures. Sig figs must be properly handled when adding, subtracting, multiplying and dividing quantities in scientific calculations.
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The document contains a series of chemistry questions and multiple choice answers about chemical reactions and stoichiometry. This includes questions about the meaning of coefficients in a chemical equation, calculating products of a reaction given moles of reactants, determining the reactant left in excess and leftover amounts after a reaction, identifying an antacid, predicting precipitates from a double displacement reaction, counting oxygen atoms in a molecule, and identifying spectators in a chemical reaction.
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The document discusses the chemical equation for iron rusting. It states that in the reaction 4Fe + 3O2 -> 2Fe2O3, 4 moles of iron and 3 moles of oxygen combine to make 2 moles of rust. It also mentions that in terms of mass, 224 grams of iron and 96 grams of oxygen combine to make 320 grams of rust. This chemical equation and mole/mass conversions are repeated numerous times throughout the document.
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Double replacement reactions with net ionic and spectators
Double replacement reactions with net ionic and spectators
Practice id
- 55. Whats that?