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Newest Chemical Reactions Questions

Use the chemical equation to complete the activity.2Cu+S→Cu2S Copper (Cu) reacts with sulfur (S) to form copper sulfide as
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Balance the following the chemical equation:_ Mg + _ F2 → _ MgF2 a 1:1:1 b 2:1:1 c 1:2:1 d 1:1:2
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The following equation represents the atomic masses of the reactants and products in achemical reaction. (24 + 16) + (12 + 16 +
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Which of the following describes what it means for a chemical equation to be balanced? A. it has the same type of atoms on both
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Suppose 20 atoms of hydrogen (H) react with chlorine (Cl) to produce 20 molecules of hydrochloric acid (HCl). According to the
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Use the chemical reaction to answer the question.2H2O2 -- 2H2O +O2 Which statement about the reaction is correct? A. the
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Is this statement true or false?Different elements can combine to form compounds. Responses true true false
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Which term describes the conversion of substances into different substances?(1 point)Responses photosynthesis photosynthesis
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A chemical change and chemical reaction are the same thing
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Burn in propane in water is physical or chemical change
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is the mixture of baking soda and vinegar a chemical change or a physical
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is magnesium plus hydrochloric acid a chemical change or a physical change
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is the mixture of silver nitrate and sodium chloride a chemical change or a physical change
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Which statement correctly compares synthesis and decomposition reactions?(1 point)Responses Synthesis and decomposition
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se the unbalanced chemical equation to answer the question.2NaHCO3 → Na2CO3 + CO2 Which of the following can be added to the
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Use the equation to answer the question.CH4+2O2→CO2+H2O Which statement describes why this chemical equation is not correct?
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Which statement accurately describes what happens in a reaction when reactants become products?(1 point)Atomic bonds break and
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Use the chemical equation to answer the question.2O + CH → ?H O + CO How many molecules of water are produced in the reaction?
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In a chemical reaction, two molecules are rearranged to produce two newmolecules. Reactant 1 has a mass of 12 g. Reactant 2 has
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Which parts must be balanced in a chemical equation? (1 point)energy on the reactant and product sides states of reactants and
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What symbol is used to separate the products from the reactants in a chemical reaction?Responses an arrow pointing to the right
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Use the experiment described to answer the question. You will conduct an experiment at home. Use the following materials: Clear
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In a chemical reaction, two molecules with a total mass of 76 amu react to form a single molecule. What is the mass of the
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Use the equation and the table to answer the question.FeCl3 + 3H2O → Fe(OH)3 + 3HClElement Mass of an Atom (amu)Fe 56Cl 35H 1O
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Which statement is true regarding a chemical reaction?(1 point)ResponsesEven if the total number of atoms does not change, mass
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Which element is most likely to replace hydrogen in a displacement reaction?(1 point) Responses oxygen (O) oxygen (O) bromine
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Use the reaction to answer the question.2KCl → 2K + Cl2 Which type of reaction is shown? (1 point) Responses combination
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Beryllium (Be) has four electrons. Fluorine (F) has nine electrons. Which chemical formula shows the correct subscripts for the
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Which statement best describes an oxidation-reduction reaction?(1 point)Responses a chemical reaction in which electrons are
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What was the functions of the sodium bicarbonate in this experiment?
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Iron chloride and water react according to the equation shown. The table shows the atomic masses of the elements involved in the
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Which statement is true regarding a chemical reaction?(1 point)Responses Even if the total number of atoms does not change, mass
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In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)Resp
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What are the reactants in a chemical formatA. The substance created by chemical change B. The Adams after the chemical reaction
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Ba(ClO3)2 → ____ + 3O2In or two sentences, explain the type of reaction that is occurring and identify the other product
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Ba(ClO3)2 → ____ + 3O2In or two sentences, explain the type of reaction that is occurring and identify the other product.
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Use the chemical reaction to answer the question.4Fe+3O2→2Fe2O3 What happens to atoms of Fe and O2 during the reaction?
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Use the chemical reaction to answer the question.CaCO3→CO2+CaO A scientist heats 30 grams of calcium carbonate (CaCO3 )
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Use the chemical reaction to answer the questionCaCO>CO2 + CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the
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Question 32Which of the following chemical equations is balanced correctly? a b c d
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A)Use the equation to answer the question. Which statement describes why this chemical equation is not correct? (1 point) CH4 +
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A) Which of the following equations shows a chemical change? (1 point)C3H8 + 5O2 → 3CO2 + 4H2O H2O(s) → H2O(g) C OH(l) →
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point)Responses it shows that all compounds
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rewrite as a 7th grader The scientist utilized the Law of Conservation of Mass to predict that the reaction would yield 15.9
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Use the equation and the table to answer the question.FeCl3 + 3H2O → Fe(OH)3 + 3HCl Element Mass of an Atom (amu) Fe 56 Cl 35
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rewrite The scientist used the Law of Conservation of Mass to guess that the reaction would create 15.9 grams of copper sulfide.
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that all
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that only
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All reactions are reversible.(1 point)True False
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A chemical reaction is in equilibrium when.... (1 point)forward and reverse reactions have ceased. a gas is being produced.
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What is always true according to the Law of Conservation of Matter?(1 point)Responses The total number of molecules before and
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32. Which of the following chemical equations is balanced correctly?A) C6H6 + O2 - 2CO2 + 3H2O B) Cs2 + 3CI2 - CCI4 + S2CI2 C)
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odel hypothesis will only fit into one category. Here is the graph again to help you. (4 points) Accept Hypothesis Reject look
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odel hypothesis will only fit into one category. Here is the graph again to help you. (4 points) Accept Hypothesis Reject
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odel hypothesis will only fit into one category. Here is the graph again to help you. (4 points) Accept Hypothesis Reject
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In an experiment, a student burns 115.6 grams of paper, he collects all the products, finding that it produced 10.2 grams of
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Two compounds are placed in a beaker, and they undergo a chemical reaction. An investigator finds that the total mass after the
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Magnesium hydroxide reacts with nitric acid to produce magnesium nitrate and water. Mg(OH)2+2HNO3→Mg(NO3)2+2H2O In one to two
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An example of chemical use is: A hickory tree being burned because it is ____? When it burns, energy is released.
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Use the equation to answer the question. CH4+2O2→CO2+H2O Which statement describes why this chemical equation is not correct?
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Use the equation to answer the question. CH4+2O2→CO2+H2O Which statement describes why this chemical equation is not correct?
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What occurs in a chemical reaction?Responses Products are formed without chemical bonds being broken. Products are formed
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Which statement accurately describes the products of a reaction?Responses new substances that are present at the end of a
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Which evidence is an indication that a chemical reaction has occurred?Responses freezing of a substance freezing of a substance
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which substance combines with iron
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that all
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that all
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Use the unbalanced chemical equation to answer the question. 2NaHCO3 → Na2CO3 + CO2 Which of the following can be added to the
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sodium reacts with chlorine to form the compound sodium chloride, or salt. The chemical formula below shows how the two elements
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Think of the burning of wood in a campfire. Why can't this reaction reach equilibrium?(1 point) Responses The reaction releases
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Use the chemical reaction to answer the question.4Fe+3O2→2Fe2O3 What happens to atoms of Fe and O2 during the reaction?
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Fill in the number of atoms please.Experiment Chemicals Formula Elements No of Atoms Observations 1(A) Magnesium metal,
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what is the formula for Steel wool and copper sulfate.
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A student has an unknown powder and wants to determine what it is. Based on appearance, the student believes it is baking soda.
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Which option shows a correctly balanced chemical equation?H₂O ⟶ H₂ + O₂ 2Fe₂O₃ + C ⟶ Fe + 3CO₂ FeS + 2HCl ⟶
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In any balanced chemical reaction, the quantities that stay the same are
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Which type of reaction is represented by this generic equation: A + B → AB
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In a chemical reaction, the number of atoms in reactants must equal the number of atoms in the products is known as the
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The substances that combine in the beginning of a reaction are called the
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Given the following chemical equation, how many coefficients need to bechanged to make this chemical equation balanced? In +
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In a chemical reaction, two molecules with a total mass of 76 amu react to form a single molecule. What is the mass of the
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Use the equation and the table to answer the question.FeCl3 + 3H2O -- Fe(OH)3 + 3HCl Element Fe Cl H O Mass of an Atom (amu)
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Is this statement true or false?If one or more substances change into new substances, a chemical change occurred. Responses true
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When vinegar and baking soda are mixed together, they experience a chemical change.What evidence given would lead a person to
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If two types of matter are combined and energy is given off, what type of change is likely to have occurred?Responses particle
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Which statement is true regarding a chemical reaction? A. even if the total number of atoms does not change, mass may not be
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In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products? Only one
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In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?A. CO2 + H2O
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Balance the following chemical equation. Drag the option from the list at the bottom to the correct spot. (4 points)(4 points)
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Use the following chemical equation. (3 points)H2 + 02 - 2H20 Using the drop down box selection to construct a statement that
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Use the following chemical equation. (3 points)H2 + 02 - 2H20 Using the drop down box selection to construct a statement that
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What is always true according to the law of conservation of matter? A. atoms created during a chemical reaction must have the
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When potassium salt (KCI) forms, which action occurs between the reacting elements? (1 point)O Chlorine donates an electron to
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Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (o) to form 10 molecules of carbon dioxide (CO2). According to the
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A chemical reaction produces a molecule in which all of the atoms have a stable configuration. Which molecule could be the
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Use the reaction to answer the question.Zn + 2HCI -> ZnCh + H2 Which type of reaction is this? (1 point) • single-replacement
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Use the equation to answer the question.CH. + 202 - COz + 2H20 If you change202 to a 302, what will be the change in the results
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Which element is most likely to replace hydrogen in a displacement reaction?A. lithium (Li) B. bromine (Br) C. helium (He) D.
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Use the reaction (2KCl to 2k + Cl2) to answer the questionWhich type of reaction is shown? A. decomposition B. displacement C.
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Which statement best describes an oxidation-reduction reaction?A. a chemical reaction in which there are fewer products than
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