Stull_Lab#4

rmal text BIUA Arial 17.2 + . 1. . 2. | 3 | 4 in blue ink using complete sentences. 1. How is a physical change different from a chemical change? 2. How do you know a chemical reaction has happened? 3. Give an example of a chemical change. 4. How do you know this chemical reaction has taken place? 5. Name three different properties you can test before and after a chemical reaction to determine if a new substance was formed. 6. What does a catalyst do in a chemical reaction? 7. Are the number of atoms before and after a chemical reaction the same? Why? 8. What are two ways you can tell that the steel wool in the video underwent a chemical reaction? Support | Schoology Blog | PRIVACY POLI

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Suppose that you heated the hydrated copper (II) sulphate in a test tube, instead of a beaker. How might this affect your results? 4 MAY 19 ... MacBook Pro & * %23 $ 2 3 4 5 6 7 E Y U G H J K C V M MOSISO command option command レー

Ma X ATM HOMEWO X #5112480241329813180832311&eISBN=9781305862883&id=1707785907&snapshotid=33... D21 Grades - X G when doe X References Submit Answer MindTap x G Match ea X Use the References to access important values if needed for this question. Under certain conditions, the substance hydrobromic acid can be broken down to form hydrogen and bromine. ervation of Mass: Macroscopic: This is group attempt 1 of 10 Autosaved at 7:17 PM ☆ If 22.3 grams of hydrobromic acid react to form 0.3 grams of hydrogen, how many grams of bromine must simultaneously be formed? grams bromine Ch.2: Ato- Q Search Regenerat

need help with the chemical reaction that took place

> Learning states. Experiment 2: Write the balanced chemical equation for the decomposition of copper(II) carbonate hydroxide. Include physical

What is the balanced net equation? It's unclear on my side. I only see 2 equations

Use the information below to answer questions 1- 3. PCI,(g) 2 PCI;(g) + Cl2(8) PCI,(g) decomposes into PCI,(g) and Cl,(8) according to the equation above. A pure sample of PCI,(g) is placed in a rigid, evacuated 1.00 L container. The initial pressure of the PCI5(g) is 1.00 atm. The temperature is held constant until the PCI,(g) reaches equilibrium with its decomposition products. The figures below show the initial and equilibrium conditions of the system. PCI5 Potal = 1.00 atm PCI5, PCI3, and CI, Prstal = 1.40 atm Figure 1: Initial Figure 2: Equilibrium As the reaction progresses toward equilibrium, the rate of the forward reaction (A) increases until it becomes the same as the reverse reaction rate at equilibrium (B) stays constant before and after equilibrium is reached (C) decreases to become a constant nonzero rate at equilibrium (D) decreases to become zero at equilibrium If the decomposition reaction were to go to completion, the total pressure in the container would be (A) 1.4…

Part A Look at the three bottles. What evidence is there that a chemical reaction took place? Part B Compare bottles 1 and 2. How do the amounts of the reactants compare? How do the amounts of the products compare? For these two bottles, does the amount of product appear to be proportional to the amount of ammonia used? Part C Compare bottles 2 and 3. How do the amounts of the reactants compare? How do the amounts of the products compare? For these two bottles, does the amount of product appear to be proportional to the amount of ammonia used? Part D Compare your answers in parts B and C. If your answers to those questions are different, explain why they’re different. Part E Imagine mixing 1 tablespoon of Epsom salt with 2 cups of ammonia. How much precipitate would be produced? Describe the amount of precipitate by comparing it with the amount in bottle 1, 2, or 3. Explain your prediction. i need them all answered please

I need help with this and use the model (Not honor class) (Not grading)

CHCASE Dashboard Item 3 A student modek four types of land use in a city. Each model has the same amounts of soil, pebbles, and gravel. A bottle is placed under each model to represent an aquifer, as showWn. Item 4 Item 5 Item 6 Item 7 Aqulfer Aquifer Item 8 Model P Model Q Item 9 Item 1 Item Item Aquifer Aquifer Model R Model S Which model represents land use that will recharge groundwater in a city the most, and why? O Model P; it has green spaces with grass and plants. O Model Q; it has neighborhoods with large front yards. O Model R; it has buildings near paved roads and parking lots. O Model S; it has houses near large trees with deep roots.

pour it 2. Still sleepy from a late night studying, you take the milk out of the refrigerator and pour it on your lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation for the fact of coagulated milk onto your cereal. The last time you saw milk coagulate like that was when you added breakfast cereal. Unfortunately, by the time you notice the funny smell you have already poured clumps lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation foea added that spoiled milk coagulates.

E Korish X E Karish x A docs.google.com/docume.. Browser I Courses Education Other bookmarks E Reading list 100% Normal text Gentium B.. I U 亭 2 1 L3 3. Consider the following particulate representations. The beaker on the left represents the reaction container (reactants) prior to any reaction occurring, and the beaker on the right represents the reaction container after the reaction (products) has occurred. Reactants Products Meaning/Explanation Thermodynamic Quantity Sign + or - Enthalpy AH Entropy AS" Free Energy AG"

F1 ! What kind of symbols are used to represent the reactants and products? Q O A element symbols from the periodic table multiplying scale F2 letters of their name the alphabet 2 W S F3 -0+ # 3 E F4 D $ णी व 4 F5 R % 5 F F6 T F7 < 6 G Y F8 & 7 P H F9 U 00 X 8 F10 J N a 9

The movie below shows some molecules in a tiny sample of a mixture of gases. 12345 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ||||||||||||||||||I Drag the slider to see how the molecules move. Does a chemical reaction happen during this movie? If a chemical reaction does happen, write a balanced chemical equation for it. П yes no carbon nitrogen chlorine key hydrogen oxygen bromine X

Completion Your answers are saved automatically. Remaining Time: 22 minutes, 58 seconds. v Question Completion Status: A Moving to another question will save this response. Question 10 Consider the combustion of propane (C3H3), shown in the chemical equation below: 1 C3H3 + 502 → 3 CO2 + 4 H,0 How many molecules of 02 are needed to fully react with 97 molecules of propane? A Moving to another question will save this response. tech.edu/webapps/blackboard/content/listContent.jsp?course_id%=_455765_1&content_id=_17790076_1&mode=reset M

O • + 88 www-awu.aleks.com ALEKS - Anniston Stovall b Answered: A major component of gasoline is octane... | bartleby O CHEMICAL REACTIONS Try again. Anniston Solving for a reactant using a chemical equation 0/5 Try Again Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. Ammonium phosphate ((NH,), PO.) is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H,PO,) with ammonia (NH, alo 18 What mass of ammonium phosphate is produced by the reaction of 1.7 g of ammonia? Ar Be sure your answer has the correct number of significant digits. Explanation Recheck © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility

Two chemicals at room temperature are mixed and their container starts to feel warm to the touch. What type of reaction is occurring?

How can we find the percentage? And the produced?

Students react zinc with hydrochloric acid to produce zinc chloride and hydrogen gas in a test tube. They weighed the reactants, the flask, and the balloon that captured the hydrogen gas. The zinc was added to the acid and the balloon attached across the mouth of the flask. The table shows the data each group collected. Zinc Zinc & Chloride Hydrochloric & |Group acid Hydrogen gas 155.67 g 155.65 g 2 157.80 g 157.78 g 3 148.22 g 146.54 g 4 155.93 g 155.92 g 169.42 g 169.43 g Explain how the data supports the Law of Conservation of Mass is followed.

education.wiley.com + 00 D2L Topic 4 (Chapter 3 and 12) Online Home... W NWP Assessment Builder UI Application W NWP Assessment Player UI Application C Question 17 Of 50 -/1 = View Policies Cur... b Similar Questions | bartleby E Topic 3 (Chapter 3 and 12) Online Homework Assignment Question 15 of 50 0/1 E View Policies Show Attempt History Current Attempt in Progress Incorrect. Write a balanced equation for the formation reaction of each of the following substances: (a) K3PO4(s) (b) acetic acid, CH3CO2H(I) (c) trimethylamine, (CH3)3N(g) (d) bauxite, Al203(s) eTextbook and Media Save for Later Attempts: 1 of 3 used Submit Answer

From the experiment below, what are your observation? The steps are provided in the photo. Please provide 3-5 sentences of your observation in your own words. (You can search the said experiment) Also, question number 1:What is the chemical reaction that took place in the rubber egg experiment? (Clue: The primary component of the egg shells is Calcium carbonate)

1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What would happen if you lit up the candle and waited for a while? Suppose the candle was placed in a large, sealed jar that allowed it to burn for several minutes before running out of oxygen. The candle and jar are balanced by an equal weight. In this situation, what would happen if you lit up the candle and waited?

Write a balanced chemical equation for each reaction.  Thanks

Remaining Time! 02:29:4. Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of Fe in the original mixture? Choose the closest answer. Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g) 2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g) 96 % 69 % 47 % 33 % 17 % Rack Question Menu - O O

Chemical Reaction Experiments: Coke and Mentos 1. The first bottle has 100 ml of coke and 1 piece of mentos. 2. The second bottle has 100 ml of coke and 3 pieces of mentos. 3. The third bottle has 100 ml of coke and 10 pieces of mentos. Give your observations and why chemical reactions occurred.

I need help with these questions and using the model 1 (Not honor class) (Not grading)

Please answer only the calculation.

Please help

Q29 Santa Monica Big Blue Bus operates a fleet of CNG buses, which run on compressed natural gas (CNG), natural gas that has been compressed into a much smaller volume in the fuel tank. A newly designed CNG vehicle carries about several thousand cubic feet of compressed natural gas which contain 72 kg (kilograms) of carbon. If all of the natural gas is burned, how many kilograms of carbon dioxide will be emitted into the atmosphere? Assume no residue remains and the carbon dioxide is the only product in the combustion. If you are presenting this question, please explain the following: The steps in the calculation process O Please write out the steps involved in the conversion process including the units O Please explain how to operate on the units Please explain how to manipulate the powers of ten by hand (e.g. product rule and the quotient rule) How to apply the appropriate rule to the calculation: O addition-subtraction rule ("the decimal places rule"), OR multiplication-division…