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Chemical Reactions Questions

2 𝑁 𝑎 𝐻 𝐶 𝑂 3 − > 𝑁 𝑎 2 𝐶 𝑂 3 + 𝐶 𝑂 2 Which of the following can be added to the products to
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How does a balanced chemical equation demonstrate the Law of Conservation of Mass?A. it shows that only physical changes follow
1. 1 answer
2. asked by Here to Help
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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
1. 11 answers
2. asked by I Like Fighting Babies
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What are the reactants in a chemical formula?(1 point) Responses the atoms after the chemical reaction, found on the right side
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Which of the following equations shows a chemical change
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Use the unbalanced chemical equation to answer the question.2NaHCO3 −> Na2CO3 + CO2 2 𝑁 𝑎 𝐻 𝐶 𝑂 3 − > 𝑁
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One molecule of bromine (Br2)( 𝐵 𝑟 2 ) and two molecules of potassium chloride (KCl) combine in a reaction. How many atoms
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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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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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2. asked by Keke
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Which is the limiting reactant when 5.00 g of H2and 10.0 g of O2 react and form water?
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Are single and double displacement reaction types of redox reactions
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which statement is true regarding a chemical reaction?even if the total number of atoms does not change, mass may not be
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2. asked by me
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When hydrogen peroxide bubbles, it is undergoing a chemical change. Which statement best describes what is happening?The atoms
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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?ch4 + o2 ->
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2. asked by me
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Which best explains why making a pancake from batter is an example of a chemical change?The pancake that forms is a different
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Jenna took an open bowl of leftover mashed potatoes from the refrigerator and noticed a difference in smell. She determined that
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Which event always involves a chemical change?boiling melting conducting burning
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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?ch4 + o2 ->
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2. asked by me
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In a science demonstration, a teacher mixed zinc (Zn) with hydrogen chloride (HCl) in a flask and quickly attached a balloon
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Which option best describes hydrolysis?(1 point)Responses oxygen in water combining chemically with substances in rock oxygen in
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2. asked by Alto Saxaphone
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Which substance combines with iron in the presence of water to form rust?(1 point)Responses nitrogen nitrogen oxygen oxygen
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2. asked by Alto Saxaphone
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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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When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a
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Which statement is true?(1 point)Responses Atoms always remain intact during chemical reactions. Atoms always remain intact
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Sodium hydroxide (NaOH) and hydrochloric acid (HCl) combine to make table salt (NaCl) and water (H2O). Which equation is
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Balanced Reactions Quick Check1 of 51 of 5 Items Question Which statement best represents the law of conservation of matter with
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Hydrogen and iodine gases react to produce hydroiodic acid according to the reaction. H2+I2→2HI How much total bond energy in
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What are different examples of chemical changes that occur in the world around us?
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2. asked by MR.BOTGPT
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What is the written name of the product for Expt. #1 - silver (I) nitrate and sodium carbonate? If there was no reaction
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For Expt. #9 - cobalt (II) chloride and sodium phosphate, if a reaction occurred here, what is the integer coefficient of the
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rewrite this but as a 9th grader chemical reaction, reactants must collide with enough energy for a reaction to occur. If the
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What types of Chemical Reactions are there?? and make sure to tell the ones that 8th graders should know.
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2. asked by I Like Fighting Babies
3. 7 views
Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda ( NaHCO3 ) and
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2. asked by I Like Fighting Babies
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In the chemical reaction below, calcium metal and water react to form calcium hydroxide and hydrogen gas.calcium metal + water
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Twenty-four grams of magnesium metal reacts with sixteen grams of oxygen gas to form magnesium oxide. According to the law of
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Iron reacts with sulfur to form iron sulfide. If 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how
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The reaction takes place in a closed system. What is true about the carbon atoms in the reaction?A. The total mass of the carbon
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Which of the following best describes the number of atoms for each element in the chemical reaction?A. There are 6 carbon atoms,
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When iron reacts with oxygen, it forms iron oxide, or rust.iron + oxygen iron oxide If 112 g of iron combines with 24 g of
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Henry puts 2.0 grams of baking soda into a 1.0 gram plastic bag. He then pours 5.0 grams of vinegar into the bag and immediately
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In a chemical reaction, the total mass of the reactants is 10.0 grams. After the reaction, the total mass of the products must
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In the chemical reaction below, sodium metal and chlorine gas combine to form sodium chloride.sodium metal + chlorine gas →
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Which of the following is true about the mass of the reactants in a chemical reaction?A. The total mass of the reactants in a
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In a chemical reaction, the elements magnesium and chlorine combined to form magnesium chloride (MgCl2). Which statement
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According to the law of conservation of matter, the number of _______ is not changed by a chemical reaction.A. atoms B. bonds C.
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When limestone (calcium carbonate) is strongly heated, it breaks down into calcium oxide and carbon dioxide.If 88 grams of
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In a chemical reaction, atoms are rearranged to form new molecules. However, atoms are neither created nor destroyed.What
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Which of the following equations demonstrates the Law of Conservation of Mass? (1 point)• CH4 + 02 → CO2 + HO • CH4 + 02
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2 grams of potassium (K) reacts with 5 grams of Oxygen (0). According to the Law of Conservation of Mass, how many grams of
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78 g of potassium (K) react with 71 g of chlorine (CI) to produce potassium chloride. According to the Law of Conservation of
1. 1 answer
2. 4 views

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