The First Law of Thermodynamics tells us A) that the energy of the universe is always increasing. B) that the energy of the universe is a constant. C) that the energy for a chemical reaction is a constant. D) that a chemical reaction will always release energy.

Q: Use the set of three reactions shown below to answer the questions that follow. 2NO(g) + O2(g) →…

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Q: Complete and balance the following chemical equation for the Complete combustion of Ethanol: (List…

A: The complete and balance equation for the complete combustion reaction of ethanol has to be given.

Q: What kind of reaction happens when a material's energy is released and heat is produced? Endothermic…

A: When energy is released and heat is produced during a chemical reaction, it is called an exothermic…

Q: Carbon and oxygen combine to form carbon dioxide. What are the reactants, or what is the reactant,…

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Q: Which type has a single compound as a reactant?

A: A→ B + C Where, A is the reactant. B and C are the products.

Q: The substance produced by a chemical reaction is called

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Q: Heat is evolved diving: (a) Endothermic Reaction(b) Displacement Reaction(c) Combustion Reaction(d)…

A: Before looking at the options, it is important to understand the types of reaction given here. (a)…

Q: What are the significant concepts about balancing chemical reactions?

A: 1. Balananced chemical equation obeys Law of conservation of mass.  2. Which states that mass is…

Q: What happens when Ethanol burns and what happens after it burns? What happens to the matter in…

A: Ethanol is a chemical substance made up of carbon, hydrogen and oxygen atoms. The chemical formula…

Q: Which statement is true about the following reaction? N + He → "O 13.992 4.00 15 16.99 86 + H amu…

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Q: Which diagrams are exothermic reactions?

A: The answer to the following question is -

Q: is a chemical reaction and a chemical change the same

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Q: (a) Write the chemical equation for the formation of 1 mole of ethanol from its elements. Include…

A: The elements included in the formation of ethanol are carbon, hydrogen and oxygen.  Carbon is solid…

Q: Br (a) H. and Br CH, and "Br Br CH, Br. (e) and

A: Since you have posted a multiple question with multiple sub-parts, we will solve first three…

Q: How can chlorine become stable?

A: As we all know that chlorine is having 7 electron in the outer most shell. It need one more electron…

Q: What is chemical energy? How is energy stored in chemical bonds?

A: To find: What is chemical energy. How is energy stored in chemical bonds.

Q: In Law of Conservation of mass, is there an exception to this law? I read some that gas is an…

A: The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither…

Q: Describe the similarities and differences in the energy profiles for exothermic and endothermic…

A: Exothermic reaction are the chemical reactions in which energy is released and Endothermic reactions…

Q: (a) Mass of the Calorimeter (two empty cups) in g: 4.0g (b) Mass of the cold water and the…

A: Given data:

Q: The energy associated with the motion of particles in a substance is called   chemical energy. heat.…

A: The heat energy is associated  with the motion of the particles in a substance .Particles in a…

Q: Use the set of three reactions shown below to answer the questions that follow.2NO(g) + O2(g) →…

A: Part 1:Given, mass of NO = 57.4 gMoles of NO can be calculated as:

Q: When and how does a chemical reaction occur?

A: When two or more substance interact with each other and their bonds are breaks that place chemistry…

Q: Based on the law of conservation of energy, which of the following describes the transformation of…

A: Law of conservation of energy;   Energy can be neither be created nor destroyed but it can be…

Q: complete and balanced chemical equation

A: Given: In the reaction of nitrogen and hydrogen gases, ammonia and heat are generated.

Q: In the reaction of hydrogen gas and oxygen gas to form water, the glowing splint provides _________…

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Q: If energy is absorbed by the reaction that is taking place, where will the heat be absorbed from?…

A: In such calorimeter, amount of heat released in the reaction or used up in the reaction is…

Q: The energy changes in chemical reactions occurs when atoms _____ to form new substances. dissociate…

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Q: 1. Consider the equation: (a) Is this equation balanced?

A: This is the concept of balanced coefficient

Q: Why are  combustion reaction important? Give an example.

A: Why are combustion reactions important? Give an example.

Q: What is conservation of energy and how does it relate to chemical reactions?

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Q: convert an energy of 526 cal to units of joules

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: e total change in energy of the

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the general class of reaction of potassium cyanide? How much heat must be added or removed…

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Q: What does one mean by exothermic and endothermic reactions? Give examples.

A: Exothermic recation is a process in which there is a release of energy from the reaction to the…

Q: What area of study in chemistry is concerned with the heat transfers that occur during chemical…

A: Thermodynamics is one of the topic of science which is in physics as well as chemistry.

Q: What are some characteristics that a chemical reaction occurred?

A: There are many changes when a reactant is converted to product. There are many physical changes that…

Q: Which statement about the reaction illustrated in the diagram is true? (B) (A] (C) (D) O The energy…

A: Which statement is true?

Q: a) BaCl, (aq) + Na,SO, (aq) → b) Na,SO, (aq) + Sr(NO,), (aq) c) H,SO, (aq) + MGCO, (s) >

A: displacement reaction The reactions in which two reactants react with each other and exchange their…

Q: What is an endothermic reaction? What information on the graph above shows that’s the reaction…

A: Endothermic reaction : It is a reaction in which reactant absorbed energy(heat) from its surrounding…

Q: When 3.8 g A are reacted with 8.5 g D,  according to the balanced chemical equation below, 33 kJ of…

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Q: What is the definition of the state element?

A: Defination of element ---- The substance which can not be decopmpose into simpler substance by using…

Q: A student makes the following statement: The energy required to break the bonds in the reactants is…

A: The energy required to break the bonds in the reactants is less than the energy released in the…

Q: Which statement is true of a chemical change? A. Heat is always exchanged between the system and…

A: Thermodynamics is the branch of chemistry in which we deals for the change in energy or heat, work…

Q: f) An reaction is one that gives off heat. g) The amount of energy required to raise the temperature…

A: " Since you have posted a question with multiple sub-parts , we will solve first three sub-parts for…