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