For each of the following reactions, calculate the grams of...

For each of the following reactions, calculate the grams of indicated product when $25.0 \mathrm{~g}$ of the first reactant and $40.0 \mathrm{~g}$ of the second reactant are used: a. $2 \mathrm{SO}_{2}(g)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{SO}_{3}(g) \quad\left(\mathrm{SO}_{3}\right)$ b. $3 \mathrm{Fe}(s)+4 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(s)+4 \mathrm{H}_{2}(g) \quad\left(\mathrm{Fe}_{3} \mathrm{O}_{4}\right)$ c. $\mathrm{C}_{7} \mathrm{H}_{16}(l)+11 \mathrm{O}_{2}(g) \stackrel{\Delta}{\longrightarrow} 7 \mathrm{CO}_{2}(g)+8 \mathrm{H}_{2} \mathrm{O}(g) \quad\left(\mathrm{CO}_{2}\right)$

For each of the following reactions, calculate the grams of indicated product when $25.0 \mathrm{~g}$ of the first reactant and $40.0 \mathrm{~g}$ of the second reactant are used:
a. $2 \mathrm{SO}_{2}(g)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{SO}_{3}(g) \quad\left(\mathrm{SO}_{3}\right)$
b. $3 \mathrm{Fe}(s)+4 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(s)+4 \mathrm{H}_{2}(g) \quad\left(\mathrm{Fe}_{3} \mathrm{O}_{4}\right)$
c. $\mathrm{C}_{7} \mathrm{H}_{16}(l)+11 \mathrm{O}_{2}(g) \stackrel{\Delta}{\longrightarrow} 7 \mathrm{CO}_{2}(g)+8 \mathrm{H}_{2} \mathrm{O}(g) \quad\left(\mathrm{CO}_{2}\right)$

Key Concepts

Stoichiometric Calculations

Stoichiometric calculations involve determining the quantitative relationships between reactants and products in a chemical reaction. By using the mole ratios from the balanced equation, it is possible to compute how much of a reactant is needed or how much product will be formed.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole. This concept is crucial for converting between the mass of a substance and the number of moles, facilitating accurate stoichiometric calculations.

Limiting Reactant

The limiting reactant is the substance in a chemical reaction that is entirely consumed first, limiting the extent of the reaction and determining the maximum amount of product that can be produced. Identifying the limiting reactant is key to predicting yields in chemical reactions.

Balanced Chemical Equations

Balanced chemical equations express the conservation of mass by showing the precise mole ratios in which reactants combine and products form. They provide the necessary proportional relationships used to relate the quantities of substances involved in a reaction.

Mole Concept

The mole is a fundamental unit in chemistry that quantifies a specific number of particles (Avogadro's number) and serves as a bridge between the microscopic world and measurable quantities. Using moles allows chemists to accurately relate masses to the number of atoms or molecules.

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