Catalysts speed up reactions without being used up. It is used for chemical equations that have reversible reactions. 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 Equation: Chemical reactions can be written in chemical equation form which should always be balanced. Which of the following best characterizes the structure of a diamond. Which statement best distinguishes nuclear reactions from chemical reactions? Chemical reactions often involve color changes, temperature changes, gas production, or precipitant formation. Add to My Bitesize Add to My Bitesize. Preview this quiz on Quizizz. the chemical composition of the atoms remains the same. Is this answer right ? 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. 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 catalyst decreases the activation energy needed. 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?" A. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Which statement best describes a mole? The metabolism is always at work and is driven by these chemical reactions. In lab students were asked to make a statement as to whether adding mentos to coke was a chemical or physical change. The catalyst makes lower energy pathways available. Which statement best describes how a catalyst can speed up a chemical reaction? Approximately equal amounts of reactants and products are present. B. 2. Which statement best describes how a catalyst can speed up a chemical reaction? Chemistry. The substances that enter into a chemical reaction are called reactants and the substances formed are the products. 33. The purpose of slave codes was to? The catalyst increases the concentration of reactants. Correct answers: 1 question: Which of the following characterizes nuclear reactions? NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. The symbol “>” means “reacts faster than” a. Which statement correctly describes a chemical reaction? Related Questions in Chemistry. The products are present in higher concentration. Describe the Action of an Enzyme in a Chemical Reaction. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Chemical reactions that give off light and heat and light are colloquially referred to as "burning." - edu-answer.com A chemical reaction is a process generally characterized by a chemical change in which the starting materials (reactants) are different from the products. Products go into a reaction, Mark this and return Save and Exit Sube The reactants are present in higher concentration. Chemical reactions are necessary for the growth, health, and maintenance of all living organisms. Which statement best explains this result? The narrator is disinterested in emulating his brother. Tremendous amounts of energy are involved in nuclear reactions. Books. B. It is used mainly for writing chemical formulas . Chemistry. Balanced reactions, reversibility, and equlibrium. A high activation energy means molecules have less kinetic energy and hence rate of reaction will be slower. A high activation energy means molecules must have more kinetic energy to overcome it, and hence rate of reaction will be faster. Energy is absorbed to break bonds, and energy is evolved as bonds are made. Chemistry mostly deals with reactions involving exchange and sharing of electrons. \[C_xH_y + O_2 \rightarrow CO_2 + H_2O\nonumber \] Although combustion reactions typically involve redox reactions with a chemical being oxidized by oxygen, many chemicals "burn" in other environments. Enzymes are a critical ingredient in many of these reactions… the number of protons and neutrons in reacting atoms changes. It is used for directly comparing the amounts of substances . Energy is always released Bonds between atoms break and new bonds form. asked Aug 26, 2015 in Nursing by Emily. Chemical reactions and tests. 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 used by industry to create many useful products. Simple examples of everyday reactions … A chemical reaction transforms one or more substances into a set of different substances. A student listed the characteristics of chemical and nuclear reactions. A. Which statement best characterizes the narrator’s relationship with his brother? 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. Never produced in a classroom which comparison would a teacher most likely use for describing a … statement. 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