Consider the unbalanced chemical equation. H2O(l)−→−−−−−−−−electrical currentH2(g)+O2(g)H2O(l)→electrical currentH2(g)+O2(g) A chemistry student tries to balance the equation by placing the subscript 2 after the oxygen atom in H2OH2O.   Placing the subscript 2 after H2OH2O would change the _______of molecules, not the ______ of molecules. It results in H2O2, which is ______. To balance chemical reactions, one must add ______, not subscripts.

Q: One day in lab, while washing some glassware, your friend Elsa (an expert chemist) says this: "Metal…

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Q: Consider the reaction, N204(g) = 2 NO2(g) where the value for Ke is 1.7 x 10-6. The initial…

A: Given Reaction:-  N2O4(g)  <------> 2NO2(g)  Kc =  1.7 × 10-6

Q: 4. Enter the chemical equation 2H+(aq)+S2−(aq)→H2S(g)2H+(aq)+S2−(aq)→H2S(g)?

A: Given:-we have to  enter the chemical equation.2H+aq+S2-aq →           H2Sg

Q: Macroscopic evidence that shows a chemical change did not take place. Ag (s)+HCl (aq) —-> no…

A: This question is based on reactivity of elements.

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Q: A typical antacid tablet contains 0.50g of calcium carbonate. The chemical equation for the…

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Q: When aqueous solutions of potassium chromate and barium chloride mix, a yellow solid forms. Write a…

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Q: Choose an example of a displacement reaction. O 2H;(9) + O;(9) → 2H;O(!) O Sn(s) + 2HCI(ag) → SnCla…

A: The reactions given are,

Q: In the following balanced chemical equation, which chemical species is the OXIDIZING AGENT?…

A: Given the balanced chemical equation : 3Fe(NO3)3(aq)  +  2Al(s)  →  3Fe(s)  +  2Al(NO3)3(aq) The…

Q: Potassium metal reacts with water according to the following balanced equation. 2 K(s) + 2 H₂O(1) →→…

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Q: 3) The chemical equation given below is not balanced. Which is the correct coefficient for K when…

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Q: Question 5. You are very familiar with the various clock reactions that make iodine in some form or…

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Q: 13. Complete the table below. :8 hes Equation 1: Equation 2: 1 H₂(g) + 02(g) Mg(s) + 2HCl(aq) SUL…

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Q: What evidence of a chemical reaction might you see when the chemical reaction below is run in a…

A: The given reaction is: Na2S (aq)  +  CuSO4 (aq)  ⟶  Na2SO4 (aq)  + CuS(s) Here, by the double…

Q: Select the compound that is the strongest acid. O Formic acid K, 1.8 x 104 O Hypochlorous acid K,-…

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Q: Balance the acid-base neutralization reaction.  Start by writing the names of the two products…

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Q: Over sushi and sake at dinner one day, your friend Diane (an expert chemist) says this: "Metal…

A: Hydrogen sulfide (H2S) is a colorless gas with a strong odor of rotten eggs. When we are exposed to…

Q: Decide whether each chemical reaction in the table below is an oxidation-reduction ("redox")…

A: Please have a look on the solution :

Q: CHEMWORK When the following solutions are mixed together, what precipitate (if any) will form? Note:…

A: To solve this problem we have to complete the given chemical equation .

Q: Which of the following reactions is an example of a single replacement reaction? Options:…

A: A single-replacement reaction is a chemical reaction in which one element is substituted for another…

Q: Which of the following reactions is a combination reaction?     Mg (s) + CuSO4 (aq) → MgSO4 (aq) +…

A: A combination reaction is a reaction in which two reactants of a reaction combine to form a single…

Q: When the following molecular equation is balanced using the smallest possible integer coefficients,…

A: A balanced chemical equation is the one that consists of equal number of every atom of an element at…

Q: Find the necessary amount of Ag;CO3 in grams in order to obtain 79.7 g of silver. Ag,CO3 → Ag(s) +…

A: The given unbalanced reaction is : Ag2CO3  →∆  Ag(s)  +  CO2  +  O2 The mass of silver to be…

Q: For each reaction in the table below, write the chemical formulae of any reactants that will be…

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Q: Classify each chemical reaction: reaction 2 Na(s) + Cl₂(g) → 2NaCl(s) HCl(aq) + NaOH(aq) → NaCl(aq)…

A: There are various types of reactions such as combination reaction, displacement reaction,…

Q: balance equations Mg(NO3)2 (aq) + CaCl2 (aq) → MgCl2 (aq) + Ca(NO3)2 (aq) BaCl2 (aq) + Na2SO4 (aq)…

A: If the atoms of each element in the reactant side is equal to the atoms of element in the product…

Q: Please balance the following chemical reactions. Include the state of the matter.  1. CaCl2 (aq) +…

A: A reaction is said to be balanced if all the atoms present in the reactants are equal to the atoms…

Q: What is the correct description for the chemical equation 4Fe(s) + 30,(g) 2Fe,0,(s)? a. Solid iron…

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Q: Given the reaction below, complete the line notation. Au3+(aq) + Co(s) → Co2+(aq) + Au(s) 1 || VI…

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Q: Classify each of the following as a strong acid or a weak acid. Indicate how each should be written…

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Q: You add solid nickel metal to a solution of manganese chloride. The expected reaction is Co (s) +…

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Q: From the chemical equation below, what is the oxidizing agent? 2Cr^3+(aq) + 6Cl^1-(aq) --> 2Cr(S) +…

A: Redox reaction: Redox reaction is a type of chemical reaction in which the oxidation states of atoms…

Q: 1. A sample of 23.4 grams of sodium hydroxide is mixed with 18.7 grams of lithium sulfide, producing…

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Q: A 12.49 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition…

A: Average atomic mass of the element = Mass of one isotope of the element x % natural abundance + Mass…

Q: a Choose an example of a displacement reaction. Ni(s) + HgCl₂ (aq) → Hg(1) + NiCl₂ (aq) Cu(NO3)2…

A: The general chemical reaction is given below.In this reaction C should be more reactive than D, then…

Q: 3. When sodium chloride dissolves in water, the ions dissociate or break apart in solution. NaCl (s)…

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Q: BALANCE ALL THE EQUATIONS!!!!

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: or each chemical reaction listed in the table below, decide whether the highlighted atom is being…

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Q: Enter the expression ¹4N+a, where a is the lowercase Greek letter alpha. Express your answer as a…

A: Answer:When a particle is bombarded on an atom and its nucleus changes by releasing and absorbing…

Q: All of the following reactions can be described as displacement reactions except 3CuCl2(aq) + 2Al(s)…

A: A displacement reaction:is the one in which a more reactive metal displaces a less reactive metal…

Q: The solubility product constant for a certain metal sulfide, M2S is Ksp = 2.9 × 10−23. Its molar…

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Q: One way in which the useful metal copper is produced is by dissolving the mineral azurite, which…

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Q: Balance the chemical reaction.

A: According to the law of mass conservation, the atoms are neither created nor destroyed during the…

Q: The solubility product constant for a certain metal phosphate, M3(PO4)2 is Ksp = 2.1 × 10−27. Its…

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Q: In the reaction: Al(s) + O₂(g) → Al₂O₂ (s), how many electrons does an atom of oxygen lose or gain?…

A: In a redox reaction, A loss of e- corresponds to an increase in oxidation number, whilea gain of e-…

Q: Determine if the following reaction is a redox reaction. Use evidence from the equation to explain…

A: In a redox reaction, oxidation and reduction occur simultaneously.

Q: [References] Use the References to access important values if needed for this question. When the…

A: To solve this problem we have to balance the given equation .