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Ch.4 - Chemical Reactions and Chemical Quantities
Chapter 4, Problem 65

Write the balanced equation for the reaction of hydrogen gas with bromine gas.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Chemical Reactions

A chemical reaction involves the transformation of reactants into products through the breaking and forming of chemical bonds. In this case, hydrogen gas (H₂) and bromine gas (Br₂) react to form hydrogen bromide (HBr). Understanding the nature of reactants and products is essential for writing balanced equations.
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Balancing Chemical Equations

Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides of the equation, adhering to the law of conservation of mass. This process often involves adjusting coefficients in front of the chemical formulas to achieve balance, which is crucial for accurately representing the reaction.
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Diatomic Molecules

Certain elements, including hydrogen and bromine, naturally exist as diatomic molecules, meaning they form pairs of atoms (H₂ and Br₂) in their elemental state. Recognizing these diatomic molecules is important when writing chemical equations, as it affects the stoichiometry and the coefficients used in the balanced equation.
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Related Practice
Textbook Question

Write the balanced chemical equation for the reaction of solid strontium with iodine gas.

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Textbook Question

Write the balanced chemical equation for the reaction of solid lithium with liquid water.

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Write the balanced chemical equation for the reaction of solid potassium with liquid water.

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Textbook Question

The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate the mass (in kg) of carbon dioxide that is added to the atmosphere per 10.0 kg of octane burned. (Hint: Begin by writing a balanced equation for the combustion reaction.)

Textbook Question

Many home barbeques are fueled with propane gas (C3H8). What mass of carbon dioxide (in kg) is produced upon the complete combustion of 37.8 L of propane (approximate contents of one 5-gallon tank)? Assume that the density of the liquid propane in the tank is 0.621 g/mL. (Hint: Begin by writing a balanced equation for the combustion reaction.)

Textbook Question

Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3) with salicylic acid (C7H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2). The balanced equation is: C4H6O3 + C7H6O3 → C9H8O4 + C2H4O2 In a laboratory synthesis, a student begins with 6.00 mL of acetic anhydride (density= 1.08 g/ mL) and 2.50 g of salicylic acid. Once the reaction is complete, the student collects 1.82 g of aspirin. Determine the limiting reactant, theoretical yield of aspirin, and percent yield forthe reaction.