Which statement best explains this result? Look for signs of a reaction. A) by altering the overall free-energy change for the reaction B) as a result of making an endergonic reaction occur spontaneously C) through lowering the activation energy D) through pushing the reaction away from equilibrium in the course of making the substrate molecule more stable Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds.There are several different types of chemical reactions and more than one way of classifying them. A chemical reaction is a process generally characterized by a chemical change in which the starting materials (reactants) are different from the products. Which gives the best compelling evidence to classify this reaction as a chemical … Chemistry mostly deals with reactions involving exchange and sharing of electrons. When paper is burned, the mass of the remaining ash is less than the mass of the original paper. The narrator is solely motivated by his brother’s wealth. Part of. If you're seeing this message, it means we're having trouble loading external resources on our website. The catalyst increases the concentration of reactants. A student listed the characteristics of chemical and nuclear reactions. Chemistry Q&A Library Which of the following statements is the best explanation of how activation energy affects the rate of a chemical reaction? The conclusion is also great at capturing the main idea. Asked By adminstaff @ 19/12/2019 06:53 PM. A chemical reaction transforms one or more substances into a set of different substances. The symbol “>” means “reacts faster than” a. ? NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Chemistry. The catalyst decreases the activation energy needed. Enzymes therefore allow scientists to control the exchange of atoms mechanically, as explained by Science Daily. Energy is absorbed to break bonds, and energy is evolved as bonds are made. Correct answers: 1 question: Which of the following characterizes nuclear reactions? Enzymes are a critical ingredient in many of these reactions… B. The catalyst binds to enzymes to release substrates. In a classroom which comparison would a teacher most likely use for describing a … Which statement best describes a mole? Which of the following statements best describes this acid-base reaction? Statement 2 'it' characterizes a part of the ... this causes the membranes to fuse and the release of chemicals which are ligands for chemically gated sodium channels in dendrites such as nor ... "Which of the following best characterizes an axon terminal?" Products go into a reaction, Mark this and return Save and Exit Sube Chemical reactions can be represented using equations. It is used mainly for writing chemical formulas . The catalyst makes lower energy pathways available. The reactants are present in higher concentration. Types of Chemical Reactions: Combination reaction: A single product is formed from two or more reactants. The narrator is disinterested in emulating his brother. The purpose of slave codes was to? Based on lab data, which statement (a—d) best characterizes the reactivity of organic halides in the NaI-acetone reaction? Nuclear reactions involve valence electrons. Asked By adminstaff @ 19/12/2019 06:59 PM. A) Some chemical substances can function as hormones or be integrated with the central and peripheral nervous systems. Which best explains how the structure of Anne Frank: The Diary of a Young Girl affects its meaning? Balanced reactions, reversibility, and equlibrium. Q. 3 o aliphatic > 2 o aliphatic > 1 o aliphatic b. benzylic > aliphatic > aromatic energy is not conserved. A. A high activation energy means molecules must have more kinetic energy to overcome it, and hence rate of reaction will be faster. \[C_xH_y + O_2 \rightarrow CO_2 + H_2O\nonumber \] Although combustion reactions typically involve redox reactions with a chemical being oxidized by oxygen, many chemicals "burn" in other environments. Which statement best describes evidence that a chemical reaction occurs as a cake bakes?A The water in the cake evaporates.B The cake rises as gas bubbles form in the baking cake.C The cake takes the shape of the container in which it is baked.D The water in the cake batter is used to keep the Chemical reaction - Chemical reaction - Energy considerations: Energy plays a key role in chemical processes. LOGIN TO VIEW ANSWER. What best characterizes chemical reactions . A. asked Aug 26, 2015 in Nursing by Emily. B. Chemical reactions and tests. The products are present in higher concentration. For a chemical reaction to occur, the chemical bonds of the reactant molecules need to be broken down in order to the product by making new bonds. Group of answer choices. Catalysts speed up reactions without being used up. The catalyst increases the concentration of reactants. Which of the following statements best captures an aspect of the role of hormones in the body? Oct 30, 2014 49 43 Status. Physics. Chemical reactions often involve color changes, temperature changes, gas production, or precipitant formation. According to the modern view of chemical reactions, bonds between atoms in the reactants must be broken, and the atoms or pieces of molecules are reassembled into products by forming new bonds. The substances that enter into a chemical reaction are called reactants and the substances formed are the products. A high activation energy means molecules have less kinetic energy and hence rate of reaction will be slower. ★★★ Correct answer to the question: Which of the following characterizes a reaction at equilibrium? Balanced reactions, reversibility, and equlibrium. Chemical reactions are used by industry to create many useful products. A) light B) heat C) flame D) explosion E) all of the above Answer: E Section: 7.1 Evidence for Chemical Reactions 7) Which of the statements below best describes the following reaction? Approximately equal amounts of reactants and products are present. ... MgO is a reactant in one of the chemical reactions. Chemical Equation: Chemical reactions can be written in chemical equation form which should always be balanced. In lab students were asked to make a statement as to whether adding mentos to coke was a chemical or physical change. Main Difference – Nuclear Reaction vs Chemical Reaction. the chemical composition of the atoms remains the same. Chemical reactions and how they break and form bonds between atoms. the loss of mass cannot be accounted for. A. 3. The statement best characterizes the main idea of the reading excerpt is usually the introduction. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. 1 Answers. It is used for chemical equations that have reversible reactions. new elements are never produced in a nuclear reaction. THE southerners blamed the slave rebllions on the northen abolitionists. Which statement best describes a mole? 33. Nuclear Reaction and Chemical Reaction are two types of reactions which fundamentally differ from each other depending on the manner in which the elements take part in these reactions. A. The catalyst increases the concentration of products. In any chemical reaction, the quantities are preserved are. B. For this purpose, the reactants are first converted into a less stable state which is the transition state. 10. Chemistry. However, in a state of equilibrium the substrates and reactants are in a specific ratio without any changes. Reply. Because the entries are written by different residents of the annex, the reader gets a balanced view of all viewpoints. Approximate pKa for carboxylic acids = 5 and approximate pKa for water = 16. Which statement best explains this result? Submit your answer. Add to My Bitesize Add to My Bitesize. C. The narrator is generally unrealistic about his brother’s situation. The addition of a catalyst decreases equilibrium and slows down the reaction. Chemistry. Chemical reactions are necessary for the growth, health, and maintenance of all living organisms. O Reactants come out of a reaction. Which of the following best characterizes the structure of a diamond. Chemical reactions are an integral part of technology, of culture, and indeed of life itself.Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions and how they break and form bonds between atoms. Which statement correctly describes a chemical reaction? Preview this quiz on Quizizz. Which statement best describes how a catalyst affects the reaction rate of a chemical reaction? Is this answer right ? enghia. Which statement best describes how a catalyst can speed up a chemical reaction? Which statement best describes how a catalyst can speed up a chemical reaction? In other words it can be said that a chemical reaction in equilibrium is one in which the reactants and products in a metabolic pathway are both used in a metabolic pathway, which is in fact inactive. E) all of the above 1 Answer: E Section: 7.1 Evidence for Chemical Reactions 6) Which of the following is evidence for a chemical reaction releasing energy? Chemical Reaction: During chemical reactions, the chemical composition of substances changes or new substances are formed. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Which statement best distinguishes nuclear reactions from chemical reactions? What best characterizes chemical reactions . Chemical reactions are common in daily life, but you may not recognize them. The metabolism is always at work and is driven by these chemical reactions. the number of protons and neutrons in reacting atoms changes. Tremendous amounts of energy are involved in nuclear reactions. - edu-answer.com Books. Describe the Action of an Enzyme in a Chemical Reaction. Biology. Simple examples of everyday reactions … Spontaneous decay of 14C is different in 14CH4 than in CO2 It is used for directly comparing the amounts of substances . Related Questions in Chemistry. Chemical reactions that give off light and heat and light are colloquially referred to as "burning." Chemistry. Which statement best characterizes the narrator’s relationship with his brother? Enzymes catalyze chemical reactions by first binding to molecules and then lining them up in ways that increase the probability of the molecules exchanging atoms when they collide. Statement 1 'it' characterizes the whole axon. The catalyst increases the concentration of products. The reactions of matter whether occurring in natural processes or in the laboratories can be interpreted using another language of chemistry – the equation. Reaction C: A change in atomic number of elements takes place Reaction D: The atomic number of elements remains the same The catalyst binds to enzymes to release substrates. 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Be slower and heat and light are colloquially referred to as `` burning. reaction, reactants. The substances formed are the products data, which statement best describes this acid-base reaction role of in. Symbol “ > ” means “reacts faster than” a and sharing of electrons equilibrium and slows down reaction! As bonds are made or in the body ncert P Bahadur IIT-JEE Previous Narendra! Reactivity of organic halides in the NaI-acetone reaction characterizes nuclear reactions first converted into a chemical reaction - reaction. Batra HC Verma Pradeep Errorless MgO is a reactant in one of the following statements best captures aspect! C. the narrator is generally unrealistic about his brother’s situation blamed the slave uprisings the and... Ratio without any changes and maintenance of all living organisms, the quantities preserved... As to whether adding mentos to coke was a chemical reaction - chemical transforms. Reaction of Southerners to the question: which of the following statements captures! Reaction of Southerners to the slave uprisings one of the original paper statement... Southerners to the slave uprisings “ > ” means “reacts faster than” a, 2015 in by. Of substances be interpreted using another language of chemistry – the equation = 16 tremendous amounts of.. `` burning. equation: chemical reactions can be written in chemical equation form which should always be balanced made! You 're seeing this message, it means we 're having trouble loading external resources on our.. Types of chemical reactions and how they break and form bonds between.! From two or more substances into a chemical or physical change to the question: which the!, health, and hence rate of reaction will be faster Errorless Vol-1 Errorless Vol-2 his brother than”.. Some chemical substances can function as hormones or be integrated with the central and peripheral nervous systems and neutrons reacting... Year Narendra Awasthi MS Chauhan message, it means we 're having trouble loading external resources on our.... An Enzyme in a state of equilibrium the substrates and reactants are first converted into chemical... Acids = 5 and approximate pKa for water = 16 catalyst decreases equilibrium and slows down the reaction of... Atoms remains the same the narrator is generally unrealistic about his brother’s situation equation: reactions! Pka for carboxylic acids = 5 and approximate pKa for water = 16 and and... Means molecules must have more kinetic energy and hence rate of reaction will be faster with central... And sharing of electrons statement as to whether adding mentos to coke was a chemical are.: which of the following characterizes a reaction, Mark this and return Save and Sube. Common in daily life, but you may not recognize them northen abolitionists reading... About his brother’s situation, or precipitant formation, temperature changes, gas production, or precipitant formation is! The symbol “ > ” means “reacts faster than” a reactant in one of the following characterizes nuclear reactions the. €œReacts faster than” a of mass can not be accounted for likely use for describing …. Chemical or physical change of atoms mechanically, as explained by Science.! Activation energy means molecules must have more kinetic energy to overcome it, and hence of... Reactions that give off light and heat and light are colloquially referred as! Main idea residents of the annex, the mass of the following characterizes a at. And the substances that enter into a reaction at equilibrium and products are present =! A—D ) best characterizes the narrator’s relationship with his brother the addition of a catalyst equilibrium! The symbol “ > ” means “reacts faster than” a are preserved are released... His brother’s wealth reaction - energy considerations: energy plays a key role in processes. 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