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 substances that enter into a chemical reaction are called reactants and the substances formed are the products. Which best explains how the structure of Anne Frank: The Diary of a Young Girl affects its meaning? Submit your answer. Asked By adminstaff @ 19/12/2019 06:59 PM. The narrator is disinterested in emulating his brother. 10. Energy is always released Bonds between atoms break and new bonds form. Which of the following best characterizes the structure of a diamond. Chemical reactions are necessary for the growth, health, and maintenance of all living organisms. A) Some chemical substances can function as hormones or be integrated with the central and peripheral nervous systems. Chemical reactions and how they break and form bonds between atoms. 3 o aliphatic > 2 o aliphatic > 1 o aliphatic b. benzylic > aliphatic > aromatic Asked By adminstaff @ 19/12/2019 06:53 PM. 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 catalyst decreases the activation energy needed. Is this answer right ? Which of the following statements best describes this acid-base reaction? Books. 1 Answers. the chemical composition of the atoms remains the same. The catalyst increases the concentration of reactants. The products are present in higher concentration. The statement best characterizes the main idea of the reading excerpt is usually the introduction. B. Spontaneous decay of 14C is different in 14CH4 than in CO2 The catalyst binds to enzymes to release substrates. A. Tremendous amounts of energy are involved in nuclear reactions. Which of the following statements best captures an aspect of the role of hormones in the body? the loss of mass cannot be accounted for. Chemical reactions are common in daily life, but you may not recognize them. 2. Catalysts speed up reactions without being used up. Approximately equal amounts of reactants and products are present. A high activation energy means molecules have less kinetic energy and hence rate of reaction will be slower. Correct answers: 1 question: Which of the following characterizes nuclear reactions? Simple examples of everyday reactions … Oct 30, 2014 49 43 Status. What best characterizes chemical reactions . THE southerners blamed the slave rebllions on the northen abolitionists. Part of. - edu-answer.com Chemistry. Which statement best describes a mole? A. A. Balanced reactions, reversibility, and equlibrium. In any chemical reaction, the quantities are preserved are. The symbol “>” means “reacts faster than” a. 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. The catalyst increases the concentration of products. 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?" WHAT statement best characterizes the reaction of Southerners to the slave uprisings? 33. Main Difference – Nuclear Reaction vs Chemical Reaction. Which statement correctly describes a chemical reaction? Because the entries are written by different residents of the annex, the reader gets a balanced view of all viewpoints. 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. Which statement best distinguishes nuclear reactions from chemical reactions? 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 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 Reaction: During chemical reactions, the chemical composition of substances changes or new substances are formed. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Chemistry. It is used for directly comparing the amounts of substances . Products go into a reaction, Mark this and return Save and Exit Sube asked Aug 26, 2015 in Nursing by Emily. Which statement best describes how a catalyst affects the reaction rate of a chemical reaction? new elements are never produced in a nuclear reaction. ... MgO is a reactant in one of the chemical reactions. The reactants are present in higher concentration. Enzymes therefore allow scientists to control the exchange of atoms mechanically, as explained by Science Daily. Chemical reactions can be represented using equations. Which gives the best compelling evidence to classify this reaction as a chemical … 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 reactions often involve color changes, temperature changes, gas production, or precipitant formation. Look for signs of a reaction. However, in a state of equilibrium the substrates and reactants are in a specific ratio without any changes. The purpose of slave codes was to? B. The catalyst increases the concentration of products. The catalyst makes lower energy pathways available. A high activation energy means molecules must have more kinetic energy to overcome it, and hence rate of reaction will be faster. If you're seeing this message, it means we're having trouble loading external resources on our website. Types of Chemical Reactions: Combination reaction: A single product is formed from two or more reactants. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Nuclear reactions involve valence electrons. Chemistry Q&A Library Which of the following statements is the best explanation of how activation energy affects the rate of a chemical reaction? LOGIN TO VIEW ANSWER. Chemical reactions and how they break and form bonds between atoms. Preview this quiz on Quizizz. Chemical reactions that give off light and heat and light are colloquially referred to as "burning." energy is not conserved. 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. The conclusion is also great at capturing the main idea. 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. Which statement best explains this result? 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? Chemical reactions and tests. 3. Describe the Action of an Enzyme in a Chemical Reaction. Statement 1 'it' characterizes the whole axon. Which statement best describes how a catalyst can speed up a chemical reaction? When paper is burned, the mass of the remaining ash is less than the mass of the original paper. The metabolism is always at work and is driven by these chemical reactions. The catalyst increases the concentration of reactants. the number of protons and neutrons in reacting atoms changes. Chemistry mostly deals with reactions involving exchange and sharing of electrons. Related Questions in Chemistry. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Enzymes are a critical ingredient in many of these reactions… 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 Balanced reactions, reversibility, and equlibrium. Based on lab data, which statement (a—d) best characterizes the reactivity of organic halides in the NaI-acetone reaction? Which statement best characterizes the narrator’s relationship with his brother? Chemical Equation: Chemical reactions can be written in chemical equation form which should always be balanced. B. Group of answer choices. enghia. 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. Energy is absorbed to break bonds, and energy is evolved as bonds are made. Add to My Bitesize Add to My Bitesize. Which statement best explains this result? Chemistry. A chemical reaction is a process generally characterized by a chemical change in which the starting materials (reactants) are different from the products. ★★★ Correct answer to the question: Which of the following characterizes a reaction at equilibrium? Which statement best describes how a catalyst can speed up a chemical reaction? Physics. Chemistry. For this purpose, the reactants are first converted into a less stable state which is the transition state. A student listed the characteristics of chemical and nuclear reactions. Approximate pKa for carboxylic acids = 5 and approximate pKa for water = 16. The narrator is solely motivated by his brother’s wealth. A chemical reaction transforms one or more substances into a set of different substances. It is used for chemical equations that have reversible reactions. C. The narrator is generally unrealistic about his brother’s situation. Q. ? Biology. It is used mainly for writing chemical formulas . O Reactants come out of a reaction. \[C_xH_y + O_2 \rightarrow CO_2 + H_2O\nonumber \] Although combustion reactions typically involve redox reactions with a chemical being oxidized by oxygen, many chemicals "burn" in other environments. Chemical reactions are used by industry to create many useful products. What best characterizes chemical reactions . A. The addition of a catalyst decreases equilibrium and slows down the reaction. Reply. In a classroom which comparison would a teacher most likely use for describing a … Which statement best describes a mole? Chemical reaction - Chemical reaction - Energy considerations: Energy plays a key role in chemical processes. The catalyst binds to enzymes to release substrates. In lab students were asked to make a statement as to whether adding mentos to coke was a chemical or physical change.