Nitric acid, HNO3, is manufactured by the Ostwald process,...

Nitric acid, $\mathrm{HNO}_{3}$, is manufactured by the Ostwald process, in which nitrogen dioxide, $\mathrm{NO}_{2}$, reacts with water. $$ 3 \mathrm{NO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow 2 \mathrm{HNO}_{3}(a q)+\mathrm{NO}(g) $$ How many grams of nitrogen dioxide are required in this reaction to produce $7.50 \mathrm{~g} \mathrm{HNO}_{3} ?$

Nitric acid, $\mathrm{HNO}_{3}$, is manufactured by the Ostwald process, in which nitrogen dioxide, $\mathrm{NO}_{2}$, reacts with water.
$$
3 \mathrm{NO}_{2}(g)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow 2 \mathrm{HNO}_{3}(a q)+\mathrm{NO}(g)
$$
How many grams of nitrogen dioxide are required in this reaction to produce $7.50 \mathrm{~g} \mathrm{HNO}_{3} ?$

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Key Concepts

Stoichiometric Calculations

Stoichiometric calculations apply the mole ratios from the balanced chemical equation to determine the amounts of reactants or products. This process is key in determining how much of one substance is needed to produce a given amount of another.

Balanced Chemical Equation

A balanced chemical equation shows the stoichiometric relationship between reactants and products by using coefficients that denote the number of moles involved. This is essential for establishing the ratios needed to convert between substances in a reaction.

Mole Concept

The mole is a fundamental unit in chemistry that relates a substance's mass to the number of its constituent particles, using Avogadro's number. It allows for the bridging of microscopic particle counts and measurable macroscopic quantities.

Molar Mass

Molar mass, expressed in grams per mole, is the mass of one mole of a substance. It is used to convert between the mass of a substance and the number of moles, which is crucial in quantitative chemical calculations.

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