M9L3 Assignment- Concentration 2023

Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?

Retype each equation into the adjacent box. Use the X' button for superscripts and the X, button for subscripts. Use the right and left arrow keys on your keyboard to get out of either the superscript or the subscript mode. 2Na + Cl, 2NaCl L(s) + 2e 21¯(aq) W étv 26 MacBook Air DII DD F12 F11 F10 F9 80 F8 F7 F6 F5 F3 F4 * & dele %23 $ 9 く

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2- Lab Report 1 Post-Lab Part A How could you distinguish solution of sodium chloride (table salt) from a solution of sodium iodide (a poison) using an AgNO3 solution? Show reactions. Express your answers as balanced chemical equations. Identify all of the phases in your answer. Seperate the two equations by a comma. > View Available Hint(s) Submit Request Answer Part B Complete previous part(s) Provide Feedback

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Predict what will be observed in each experiment below. predicted observation (choose one) experiment Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. A student wants to make two batches of rock candy. He finds an unopened box of "cane sugar" in the pantry. He starts preparing batch A by dissolving sugar in 500 mL of hot water It is likely that more rock candy will be formed in batch A. It is likely that less rock candy will be formed in batch A. (70 °C). He keeps adding sugar until no more sugar It is likely that no rock candy will be formed in either batch. dissolves in the hot water. He cools the solution to room temperature. He prepares batch B by dissolving sugar in 500 mL of water at room temperature until no more sugar is dissolved. He lets the solution sit at room temperature. I need more information to predict which batch is more likely to form rock candy.

What is the name of the following? Submit Answer Use the References to access important values if needed for this question. Try Another Version 10 item attempts remaining Previous Next

Hello I need help on these two quick questions. Thank you.

Write the balanced equation for the neutralization of acid rain (assume HNO3 is dissolved in water) by limestone (calcium carbonate). Express your answer as a chemical equation. ΑΣφ ? DA chemical reaction does not occur for this question. Submit Request Answer Provide Feedback 76 tv

11 IMPORTANT! Please adhere to the following conditions while completing this question: 1. Use only HIGH SCHOOL knowledge to complete the question. No University level workarounds. This is so that I can understand the response. 2. Respond using TYPED WORDS, please. I know this will be harder but you are allowed to use only tools and etc... 3. Keep your response organized. This is also important as your work will likely end up in my notes.

Polarity and Solubility Predictions Directions: Show your molecule below. Circle or highlight all polar portions of the how molecule. Make a reasonable prediction about whether your molecule will be soluble in water or not and explain your reasoning. If your molecule seems to be borderline in polarity, making it difficult to predict solubility, explain your reasoning and the difficulty involved. Find a source (Merck Index, PDR, etc.) that discusses the water-solubility of your drug. Compare your predictions with the information you find on the water-solubility of your drug and comment on any discrepancies. Calculate how vol) solution of mL of

ostlaboratory Questions in 4 days Unanswered Postlab Question 7.4 Homework Unanswered Which is soluble when hot water is added and why? AgCl(s), PbCl₂(s), Hg₂Cl₂(s) HE Unanswered B I A+ X₂ X² I MacBook Air Ω· Ξ 0/4 answered 66 X

Energy Respond to this prompt using 10 sentences or less. 1.) Give an example of kinetic energy in your daily life. Explain why your example is kinetic energy. 2.) Give an example of potential energy in your daily life. Explain why your example is potential energy. 3.) Provide an example where you observe either kinetic energy converting to potential energy or potential energy converting to kinetic energy.

6. GENERALIZATION Direction: MODIFIED TRUE or FALSE: Write the word TRUE if the statement is correct and if not, underline the word or statement that sentence incorrect and write the correct answer on your answer sheet. Write your answer on a separate sheet of paper. swer 1. The law of conservation of energy states that energy can either be created or destroyed. 2. A closed system is a system that has external interactions, such as energy transfers into or out of the system boundary. 3. According to the first law of thermodynamics, when heat enters or leaves a system, the system gains or loses an amount of energy equal to the amount of heat transferred. 4. A measure of energy transfer that occurs when an object is moved over a distance by an external force is known as heat. 5. The transformation of chemical energy into kinetic and heat energy by a car engine is a manifestation of the first law of thermodynamics. 6. An open system could not create or destroy energy. 7. Energy is a…