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5e880d2c-d35c-45ab-8721-947f43ce700a Determining Mass of Excess Reagent Summary Know how to determine the mass of the excess reagent left in excess

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Terms and Conditions First Things first Welcome to our web tutoring services for chemistry students! Before we dive into the fascinating world of atoms and molecules, let's take a moment to appreciate the importance of terms and conditions. They're like the safety goggles of our educational journey, protecting both parties involved. By agreeing to them, we create a chemistry between trust and responsibility. So, let's mix knowledge and compliance for a fruitful learning experience. Grab your virtual lab coat, and let's explore chemistry together! Homepage Small Title K-Chemistry "Private Tuition Rules and Guidelines 1. Rules for Attending Private Online Sessions: Login on Time: Students should log into their virtual classroom at least 5 minutes before the session starts to ensure they are ready when the session begins. Virtual Classroom Etiquette: Students should mute their microphones when not speaking. Raise your digital hand or type in the chat box if you have a question or comment. Appropriate Background: Choose a quiet, distraction-free environment for your learning. Ensure your background is appropriate and professional. Dress Code: Maintain a neat and clean appearance. Clothing should be appropriate and not distracting to others. 2. Rules for Attending Face-to-Face Sessions: Punctuality: Arrive on time. Chronic tardiness (more than 6 late arrivals) may result in a formal warning or dismissal from the tuition program. Be Prepared: Come to class ready to learn with all required materials. Respect: Treat your tutor and fellow students with respect. Mobile devices should be silent during the session. Dress Code: Maintain a neat and clean appearance. 3. Homework Submission Rules: Timeliness: Homework must be submitted by the deadline given by the tutor. If homework is not submitted 5 times without a valid reason, the student may be discontinued from the tuition. Submission Method: Homework should be scanned clearly and sent directly to the tutor or assistant via WhatsApp. Academic Integrity: All work submitted must be your own. Instances of plagiarism or cheating will result in severe consequences, up to and including expulsion from the tuition program. 4. Quiz Answering and Submission Rules: Honor System: All quizzes should be completed individually, without the aid of outside resources, unless otherwise specified by the tutor. Timeliness: Quizzes given on Monday must be submitted by the following Saturday at the latest. Technical Issues: If you experience technical difficulties during an online quiz, notify your tutor immediately via WhatsApp message or call. 5. Absence and Delay Rules: Inform Ahead: If you know you will be absent or late for a session, inform your tutor at least 12 hours ahead of time. Unforeseen Absences: In the case of a sudden illness or emergency, inform your tutor as soon as possible. Chronic Absenteeism: Missing more than 5 sessions without a valid reason may result in a formal warning or dismissal from the tuition program. Make-Up Sessions: Missed sessions can only be made up by watching the recorded session on the website.

Chapter 1 ... Chapter 4 .. Chapter 5 Mixtures and Solutions Chapter 2 ... Chapter 4 ... Chapter 5 Separation Techniques 1 Filtration Decantation Centrifugation Chapter 3 ... Chapter 4 ... Chapter 5 Separation Techniques 2 Distillation chromatography

< Back Unit 9 AP Chemistry Study Guide 1 Unit 9 Part 1 You can get more out of your site elements by making them dynamic. To connect this element to content from your collection, select the element and click Connect to Data. Once connected, you can save time by updating your content straight from your collection—no need to open the Editor, or mess with your design. Add any type of content to your collection, such as rich text, images, videos and more, or upload a CSV file. You can also collect and store information from your site visitors using input elements like custom forms and fields. Collaborate on your content across teams by assigning permissions setting custom permissions for every collection. Be sure to click Sync after making changes in a collection, so visitors can see your newest content on your live site. Preview your site to check that all your elements are displaying content from the right collection fields. Ready to publish? Simply click Publish in the top right of the Editor and your changes will appear live. Study Guide from here Unit 9 Explanations .pdf Download PDF • 4.76MB Previous Next

Lesson 21 Chapter 6 SABIS Grade 12 Part 1 Lesson 21 Calorimetry: Measuring Heat Flow in Chemical Reactions 🌡️🔥 Hey there, science enthusiasts! Ready to dive into the hot topic of calorimetry? This awesome technique helps us measure the heat flow in chemical reactions and physical processes. Let's break it down, step-by-step! 🤓 What Is Calorimetry? 🤔 Calorimetry is the science of measuring heat change in physical and chemical processes. Basically, it's a way to find out how much energy is gained or lost during a reaction. This is super important for understanding things like how different substances interact, or how much energy is needed to make a reaction happen. Why Do We Care? 💡 You might be like, "Okay, but why do we need this?" Well, it's everywhere! From the food you eat to the gas in your car, understanding heat transfer helps scientists and engineers make things more efficient and sustainable. 🌍 The Gear: Calorimeters 🛠️ To measure heat, we use a special device called a calorimeter . There are different types, but they all have an insulated container where the reaction takes place. This helps to make sure the heat doesn't escape, so we can get an accurate measurement. Types of Calorimetry 📚 Bomb Calorimetry : This is for reactions that release a lot of heat. Don't worry; it's not as explosive as it sounds! 💥 Coffee-Cup Calorimetry : For reactions in solution, like the ones you'll often see in a chemistry lab. It's literally done in a Styrofoam cup! ☕️ Differential Scanning Calorimetry (DSC) : This is more advanced and is used for studying phase changes like melting or crystallization. 🌡️ Key Terms 📝 Exothermic : Reactions that release heat. They make things feel warm! 🔥 Endothermic : Reactions that absorb heat. Yep, they make things feel cold! ❄️ The Math Behind It 🧮 The heat change in a process is usually given by the equation: Q = mc Δ T Where: Q = heat energy m = mass of the substance c = specific heat capacity Δ T = change in temperature Cool Experiments to Try 🧪 Mixing Acids and Bases : You'll feel the cup get warm, which means it's an exothermic reaction! Melting Ice : This one is endothermic; the ice will absorb heat to melt. So, that's a wrap on calorimetry! Hope this gives you a better understanding of how we study heat in science. Happy experimenting! 🎉 Next Lesson Hess's Law

5a993446-d882-47ba-a13f-eee6984ad094 Measurements and Calculations Significant Figures Basics Discover everything about significant figures and sig figs in this easy-to-follow chemistry lesson designed for students, beginners, and anyone preparing for AP Chemistry. Learn the essential rules of rounding and measurement accuracy, explore how significant digits are counted, and master the rules through examples and quizzes. This online chemistry guide, created by Mr. Hisham Mahmoud at K-Chemistry.com, is perfect for understanding scientific notation, improving your chemistry skills, and building confidence in basic science education. Whether you're looking for a chemistry tutorial, chemistry flashcards, downloadable PDFs, or interactive quizzes, you'll find them here. With clear explanations, practice questions, and visual guides, this digital chemistry resource is your go-to for high school chemistry, precision in science, and effective exam prep. Explore AP Chemistry concepts, test your knowledge with sig fig problems, and benefit from top-quality science education content, perfect for both individual study and classroom use. Next topic k-chemistry.com/concepts-definition/calculations-with-significant-figures Summary

ed89d3dd-2476-4189-8487-d0d5d5ec1581 Equations with Fractional Coefficients Summary Cannot be read in terms of molecules

⚛️ Lesson 3 ⚛️ < Back Atomic Structure Lesson 3 ⚛️ Lesson 3 ⚛️ This section explores the subatomic structure of atoms and ions, highlighting the role of protons as unchanging identifiers of elements and the flexible nature of electrons in forming ions. The calculation of protons, neutrons, and electrons in an unknown element is demonstrated, unveiling the subatomic structure and identity of the element. Understanding these concepts allows us to uncover the hidden structure of the universe, atom by atom. Previous Next ⚛️ 1.1.3 Determining Subatomic Structure ⚛️ 💥🔬 Cracking the Code of Subatomic Structures: Protons, Electrons, and Neutrons 🔬💥 ⚛️ Atoms & Ions: A Tale of Charges ⚛️ Imagine an atom as a tiny city, bustling with life and balance. At its heart, it's neutral—like a well-managed city where everyone has a role to play. But sometimes, atoms get adventurous! They might lose or gain citizens (electrons), leading to charged cities we call ions. ⚡🌆 💫 Protons: The Unchanging Pillars of Atomic Identity 💫 The number of protons is like the DNA of an atom—it doesn't change and identifies the element. Be it the lithium city with 3 protons or the beryllium city with 4, every atom and ion of the same element shares the same proton number (atomic number). So, how do we count these unchanging pillars (protons) in an unknown element? With some simple math! 🧮📚 Mass number = number of protons + number of neutrons Number of protons = mass number - number of neutrons 💡 E.g., for an unknown element X with a mass number of 63 and 34 neutrons: Number of protons = 63 - 34 = 29 🎉 We just revealed the identity of element X—it's copper! 🥳🎉 💨 Electrons: The Flexible Players 💨 While protons are the steadfast pillars, electrons are more flexible—they may change in ions. In a neutral atom, the number of electrons equals the number of protons. But ions dance to a different tune: positively charged ions (cations) have fewer electrons, and negatively charged ions (anions) have more! 🎶🔄 For our mystery element X: Number of protons (and electrons in a neutral atom) = 29 🎯 ⚖️ Neutrons: The Balancing Act ⚖️ And finally, let's not forget the neutrons. They don't carry any charge but contribute to the mass. We can find their number with another bit of math: Number of neutrons = mass number - number of protons 🔍 E.g., for our element X with a mass number of 63 and 29 protons: Number of neutrons = 63 - 29 = 34 🎉 Just like that, we've unveiled the full subatomic structure of element X—Copper with 29 protons, 29 electrons, and 34 neutrons! 🔍🔬 By understanding these concepts, you're not just learning chemistry—you're uncovering the unseen structure of the universe, one atom at a time! 💥🌌 What can atoms become when they gain or lose electrons? A) Ions 🌟 B) Neutrons 🧪 C) Protons ⚡ D) Isotopes 🔬 The number of __________ determines the identity of an element. A) Electrons 💫 B) Protons ⚛️ C) Neutrons ⚡ D) Isotopes 🌌 How can we calculate the number of protons in an unknown element? A) Mass number + number of neutrons 🧮 B) Mass number - number of neutrons 📚 C) Number of neutrons + number of electrons 🌟 D) Number of electrons - number of neutrons 💡 What is the charge of a neutral atom? A) Positive ⚡ B) Negative 💥 C) Neutral 🔋 D) Variable 🌈 What happens to the number of electrons in ions? A) They remain the same as in neutral atoms. 🔁 B) They decrease in cations and increase in anions. ⬇️⬆️ C) They increase in cations and decrease in anions. ⬆️⬇️ D) They become neutral. ⚖️ In a neutral atom, the number of electrons is equal to the number of __________. A) Protons 🌟 B) Neutrons 🌌 C) Ions ⚛️ D) Isotopes 🔬 Which subatomic particles contribute to the mass of an atom? A) Protons and electrons 💥💫 B) Protons and neutrons 🧪⚛️ C) Electrons and neutrons ⚡🌌 D) Protons, electrons, and neutrons 🔬💥💫 How can we calculate the number of neutrons in an atom? A) Mass number - number of protons 🧮 B) Mass number + number of protons 📚 C) Number of protons - number of electrons 🔍 D) Number of protons + number of electrons 💡 Copper has an atomic number of 29. How many protons does a copper atom have? A) 29 🌟 B) 63 🔬 C) 34 🧪 D) 0 💥 An element has a mass number of 47 and 20 neutrons. How many protons does it have? A) 20 🌌 B) 27 ⚛️ C) 47 🧪 D) 67 🌟 Keep up the great work in unraveling the mysteries of subatomic structures and their impact on determining the identity of elements! Let your vibrant and creative knowledge shine brightly! 🌟🔬💫

Lesson 45 Chapter 8 SABIS Grade 10 Part 1 Lesson 45 Chapter 8 First Lesson : 🔥 Understanding Heat and Chemical Reactions Part 1: Prerequisite Questions 🧠 Prerequisite Knowledge Check 🧠 Before we embark on our thrilling journey into the world of thermochemistry, let's test your existing knowledge! Answer these questions to see how much you already know about heat and chemical reactions. Page Break Question 1: What does the symbol "H" refer to in thermochemistry? a) Heat content of a substance. b) Total energy released in a reaction. c) Change in temperature during a reaction. d) Heat capacity of a substance. Question 2: What does the symbol "ΔH" represent in a chemical reaction? a) The total heat content of the products. b) The difference in energy between reactants and products. c) The heat absorbed during a reaction. d) The heat released during a reaction. Page Break Part 2: 🔍 Detailed Explanation 🔥 Heat and Chemical Reactions 🔍 8.1.1 Heat Content of a Substance In thermochemistry, heat content (H) refers to the total amount of energy stored in a substance. Think of it as a treasure chest of energy locked away in a material! 🎁 Just like a chest contains valuable items, H holds all the energy within a substance. Sample Question 1 Explanation: 🧠 Thinking it Through The symbol "H" refers to: 🎯 Correct Answer: a) Heat content of a substance. Sample Question 2 Explanation: 🧠 Cracking the Code The symbol "ΔH" (delta H) represents a "change" in heat content. It's like the difference between two treasure chests before and after a reaction! 🎯 🎯 Correct Answer: b) The difference in energy between reactants and products. Page Break 8.1.2 Enthalpy Change in Chemical Reactions Now, let's explore how heat content changes during chemical reactions! 🧪 When a reaction occurs, there's a change in heat content, represented by ΔH. This change tells us if the reaction is endothermic or exothermic. Endothermic Reactions (🥶 Absorbing Energy) In endothermic reactions, the products have more heat content than the reactants, and energy is absorbed from the surroundings. It's like a chilly snowman melting under the warm sun! 🥶☀️ Exothermic Reactions (🔥 Releasing Energy) In exothermic reactions, the reactants have more heat content than the products, and energy is released to the surroundings. Imagine it as a stunning display of fireworks in the night sky! 🎆 Sample Question 3 Explanation: 🧠 Exothermic Explosions For an endothermic reaction: 🎯 Correct Answer: e) ΔH > 0 and f) Reaction absorbs energy. Sample Question 4 Explanation: 🧠 Exothermic Fireworks For an exothermic reaction: 🎯 Correct Answer: a) ΔH < 0 and c) Reaction releases energy. Page Break Part 3: 10 MCQ Questions Question 1: What does the symbol "H" refer to in thermochemistry? a) Heat content of a substance. b) Total energy released in a reaction. c) Change in temperature during a reaction. d) Heat capacity of a substance. Question 2: What does the symbol "ΔH" represent in a chemical reaction? a) The total heat content of the products. b) The difference in energy between reactants and products. c) The heat absorbed during a reaction. d) The heat released during a reaction. Question 3: In endothermic reactions: a) ΔH < 0. b) Products have more heat content than reactants. c) Reaction releases energy. d) Reactants have more heat content than products. e) ΔH > 0. f) Reaction absorbs energy. Question 4: In exothermic reactions: a) ΔH < 0. b) Products have more heat content than reactants. c) Reaction releases energy. d) Reactants have more heat content than products. e) ΔH > 0. f) Reaction absorbs energy. Question 5: Which type of reaction absorbs energy from the surroundings? a) Exothermic reaction. b) Endothermic reaction. Question 6: Which type of reaction releases energy to the surroundings? a) Exothermic reaction. b) Endothermic reaction. Question 7: What is the enthalpy change (ΔH) for an exothermic reaction? a) Positive. b) Negative. Question 8: What is the enthalpy change (ΔH) for an endothermic reaction? a) Positive. b) Negative. Question 9: In an endothermic reaction, the heat content of the products is: a) Greater than the heat content of the reactants. b) Less than the heat content of the reactants. Question 10: In an exothermic reaction, the heat content of the products is: a) Greater than the heat content of the reactants. b) Less than the heat content of the reactants. Part 4: Answers Part 3: 10 MCQ Questions Question 1: Correct Answer: a) Heat content of a substance. Question 2: Correct Answer: b) The difference in energy between reactants and products. Question 3: Correct Answer: e) ΔH > 0 and f) Reaction absorbs energy. Question 4: Correct Answer: a) ΔH < 0 and c) Reaction releases energy. Question 5: Correct Answer: b) Endothermic reaction. Question 6: Correct Answer: a) Exothermic reaction. Question 7: Correct Answer: b) Negative. Question 8: Correct Answer: a) Positive. Question 9: Correct Answer: a) Greater than the heat content of the reactants. Question 10: Correct Answer: b) Less than the heat content of the reactants. Congratulations! 🎉 You've completed Lesson 1 and mastered the concepts of enthalpy, enthalpy change, endothermic, and exothermic reactions. Keep up the great work, and get ready for more exciting thermochemistry adventures! 🚀

SABIS Grade 11 Chapter 1 Homework 1