Questions and answers by

blobby

Questions (361)

How is a simple chemical reaction different from fusion?(1 point)Responses The atoms are bound to each other by electrons in a
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Which aspect must be taken into consideration when creating a model of radioactive decay?(1 point)Responses There must be a
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Which option would be an appropriate model of nuclear fusion?(1 point)Responses mashing two marshmallows together mashing two
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2. 10 views
Which phrase describes radioactive decay?(1 point)Responses the triggering of one reaction by the products of another the
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Why does the emission of an alpha particle always result in transmutation?.(1 point)Responses The number of protons in the atom
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In a nuclear reaction, which is the same before and after the change?(1 point)Responses the mass the mass the types of atoms the
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Is beta decay a form of nuclear fission?(1 point)Responses Yes, it is because the atomic number changes. Yes, it is because the
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An illustration shows an alpha particle emitting from the nucleus of an atom. The alpha particle consists of two protons and two
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A process in which a large nucleus splits into two or more parts is called _____.(1 point)Responses nuclear fission nuclear
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An unstable nucleus undergoes gamma decay. How does the nucleus change?(1 point)Responses It becomes less stable by
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How does the nucleus change in beta-plus decay?(1 point)Responses The mass number decreases by one, and the atomic number
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Use the equation to answer the question.14/6C→147N+0/−1e Which type of radioactive decay does the equation model? (1 point)
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Use the equation to answer the question.146C→147N+0−1e Which type of radioactive decay does the equation model? (1 point)
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Which type of energy does alpha decay generate?(1 point)Responses electromagnetic electromagnetic kinetic kinetic sound sound
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Polonium has a large, unstable nucleus. Through which process is it most likely to become stable?(1 point)Responses beta-plus
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That Spotby Jack London There are times when I think it wasn’t stupidity. Maybe, like some men I know, he was too wise to
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That Spotby Jack London I don’t think much of Stephen Mackaye any more, though I used to swear by him. I know that in those
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That Spotby Jack London I don’t think much of Stephen Mackaye any more, though I used to swear by him. I know that in those
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What is an objective summary?(1 point)Responses a thoughtful critical evaluation of a work of literature a thoughtful critical
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Which is the best definition of a summary?(1 point)Responses an introductory description that ends with a hook an introductory
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The Open Windowby H. H. Munro (Saki) “You may wonder why we keep that window wide open on an October afternoon,” said the
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How does a complex character drive a story’s plot?(1 point)Responses Their personalities are interesting and intriguing for
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A Cup of Teaby Katherine Mansfield Rosemary Fell was not exactly beautiful. No, you couldn’t have called her beautiful.
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What is one way that characters relate to plot?(1 point)Responses Characters move a plot forward through the way they are
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A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as 0/1n+235/ 92U. Which
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Use the equation to answer the question.21H+ 21H→ 42H+energy Which statement best describes the mass numbers of the atoms in
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Which fact is true during a fission chain reaction?(1 point)Responses The total number of protons will decrease over time. The
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The Open Windowby H. H. Munro (Saki) “Do you know many of the people round here?” asked the niece, when she judged that they
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The Open Windowby H. H. Munro (Saki) “Do you know many of the people round here?” asked the niece, when she judged that they
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The Open Windowby H. H. Munro (Saki) “My aunt will be down presently, Mr. Nuttel,” said a very self-possessed young lady of
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The process of radioactive decay is unpredictable and irreversible. Which option would be an appropriate model of the
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Which option would be an appropriate model of nuclear fission?(1 point)Responses dividing a stack of paper equally between two
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Which phrase describes a nuclear chain reaction?(1 point)Responses a type of reaction which only takes place in the sun and
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Which phrase best describes nuclear fusion?(1 point)Responses the spontaneous emission of radiation from an unstable nucleus the
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Use paragraph 2 from “The Interlopers” to answer the question.The forest lands of Gradwitz were of wide extent and well
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Use paragraph 1 from “The Interlopers” to answer the question.In a forest of mixed growth somewhere on the eastern spurs of
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Duskby H.H. Munro (Saki) Norman Gortsby sat on a bench in the Park, with his back to a strip of bush-planted sward, fenced by
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Which statement best describes what happens in the climax of a story? Select the two correct answers.(1 point)Responses The peak
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Duskby H.H. Munro (Saki) Norman Gortsby sat on a bench in the Park, with his back to a strip of bush-planted sward, fenced by
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Which statement is always true about the literary genre of satire?(1 point)Responses It is intended to amuse the reader. It is
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What is mood in literature?(1 point)Responses the central idea an author is trying to convey in a piece of literature the
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Duskby H.H. Munro (Saki) Norman Gortsby sat on a bench in the Park, with his back to a strip of bush-planted sward, fenced by
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Which statement best explains why mass is not conserved in a nuclear change?(1 point)Responses Some of the matter is converted
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Which statement about the balanced equations for nuclear and chemical changes is correct? (1 point)Responses A nuclear equation
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Which phrase describes transmutation?(1 point)Responses the conversion of an atom of one element into a different element
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The element radium has a mass number of 226 and an atomic number of 88. How many neutrons does an atom of radium have?(1 point)R
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Which one of the following represents an exothermic reaction?(1 point)Responses Cooking an egg until it is not runny. Cooking an
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Use the Periodic Table to complete the questions:How many valence electrons do an atom of silicon (Si) and an atom of Hydrogen
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2NaOH + CuCl2→ Cu(OH)2 + 2NaCl What type of equation is represented above? (1 point) Responses double replacement double
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How many valence electrons do a magnesium atom and a chlorine atom have?Periodic Table (1 point) Responses Magnesium has one
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Use the table to answer the question: Which statement about the change in bond energy of this reaction is correct?Table showing
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Carbon monoxide and oxygen combine to produce carbon dioxide. The total bond energy found in all the bonds of carbon dioxide
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Which event is an example of an exothermic reaction?(1 point)Responses evaporation evaporation combustion combustion melting ice
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Which phrase describes an oxidizing agent?(1 point)Responses a substance that reacts with oxygen a substance that reacts with
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The left side of a chemical reaction is shown.Mg(OH)2 + 2HNO3 → Which type of reaction will the reactants undergo? (1 point)
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Silver bromide, AgBr, decomposes into silver (Ag) solid and bromine, (Br 2) liquid at room temperature. Which ratio of silver to
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Which statement correctly compares synthesis and decomposition reactions?(1 point)Responses Synthesis and decomposition
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Acid-base reactions can also be classified as which type of reaction?(1 point)Responses double replacement double replacement
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Which statement comparing ionic and covalent bonds is correct?(1 point)Responses More electrons are transferred to form covalent
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According to the Law of Conservation of Mass, if 98 g of carbon dioxide (CO2) is produced in a reaction between oxygen (O) and
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According to the Law of Conservation of Matter, what happens to atoms during a chemical reaction?(1 point)Responses Atoms are
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The following equation does not demonstrate the Law of Conservation of Mass. How can it be changed so that the equation does
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How many atoms of carbon (C) are present in the reactants of the following chemical equation?2C6 H10 + 17O2 → 12CO2 + 10H2 O
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Which of the following equations shows a chemical change?(1 point)Responses 2H2 + O2 → 2H2 O 2H2+ O2 → 2H2O 219/86 Rn →
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Which of the following equations shows a chemical change?(1 point)Responses 2H2 + O2 → 2H2 O 2H2+ O2 → 2H2O 21986 Rn →
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Use the table to answer the question.Reaction Bonds Present Energy of Bonds Broken and Formed (kJ/mol) C + O2→CO2 O=O 2 C=O
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Use the information in the table to answer the question.Bond Bond Energy ( kJ/mol ) H–Cl 427 Cl–Cl 242 H–H 435 Hydrogen
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Use the information in the table to answer the question.Bond Bond Energy ( kJ/mol ) H-I 297 H-H 435 I-I 151 Hydrogen and iodine
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Which fact must be true if a relationship is endothermic?(1 point)Responses More bond energy is absorbed on the reactant side
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Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown.2HBr → H2 + Br2 The energy of the
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When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The
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How is total reaction energy calculated?(1 point)Responses product bond energy ÷ reactant bond energy product bond energy ÷
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Which result occurs during an exothermic reaction?(1 point)Responses Light and heat are absorbed from the environment. Light and
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In the decomposition of water, why is twice as much hydrogen as oxygen formed?(1 point)Responses Hydrogen gas has two atoms, and
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Which statement correctly describes the classification of chemical reactions into different categories?(1 point)Responses Not
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Use the table to answer the question.Element Electronegativity bromine 2.8 oxygen 3.5 nitrogen 3.0 phosphorus 2.1 Based on the
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Which phrase best describes electronegativity?(1 point)Responses the relative strength with which an element attracts electrons
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Which statement about sodium chloride is correct?(1 point)Responses The sodium atom and the chlorine atoms share electrons to
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Which element would most likely lose electrons to form positive ions when bonding with other elements?(1 point) Responses argon
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QuestionHow does physical evidence, such as rock layers, contribute to our understanding of Earth's history?(1 point) Responses
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Put the following astronomical bodies into the correct hierarchical order from smallest to largest. (1 point)Arrange responses
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Determine whether each statement below is true or false to complete the table. (1 point)True False The nucleus of an atom is
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Particles in each state of matter behave differently because they have different amounts of thermal energy. For each statement
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Which planet is approximately four times larger than the diameter of Venus on a scale model?(1 point)Responses Earth Earth Mars
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Which planet is most similar in size to Earth?(1 point) Responses Mars Mars Venus Venus Jupiter Jupiter Neptune Neptune Skip to
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A video shows the objects in the solar system orbiting the sun. Why do objects orbit the sun?(1 point)Responses The sun is
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23 of 6023 of 60 Items14:36 Question What are the main processes that contribute to the rock cycle, and how do they relate to
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Which of the following best describes the impact of the Sun on the Earth's seasons?Responses A The Earth's distance from the Sun
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The data shows the orbital period, orbital speed, distance from the Sun, and rotation period for each of the planets in our
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Determine if each of the following statements is always true, sometimestrue or never true. A. The sum of the measures of two
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can the side lengths of a triangle be 3, 6, and 9?
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(1 point)Responses 20 20 400 400 144 144 12 12 Skip to navigation
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Can the sides of a triangle have lengths 6, 14, 18. Remember to use the Triangle Inequality Theorem.
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A resort is building a scuba diving lagoon in the shape of an upside down pyramid. The top of the lagoon is a rectangle that is
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What is the volume of a rectangular pyramid with a length of 32 cm, a width of 25 cm, and an altitude of 41 cm?(1 point)Response
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Niko has an outdoor play tent in the form of a regular triangular pyramid, covered in fabric on all four sides. The surface area
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Lena is looking for a new tent to go camping. She wants one with a volume of at least 200 cubic feet. The tent she is
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What is the volume of a rectangular pyramid with a width of 9 cm, a length of 15 cm, and an altitude of 21 cm?(1 point)Responses
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A box is being constructed in the shape of a right rectangular prism. What is the volume of the box when the length is 25
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Andres needs to fill a swimming pool. The pool is in the shape of a rectangular prism. The pool has a width of 9 feet, a length
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