Sodium reacts with oxygen to produce sodium oxide. 4 Na(s)+O2(g) ⟶2 Na2 O(s) a. How many grams o

step 1 Okay, so firstly, we need to find the moles of Na given the mass, 57 .5 g. The molar mass of Na

Sodium reacts with oxygen to produce sodium oxide. 4...

Sodium reacts with oxygen to produce sodium oxide. $$4 \mathrm{Na}(s)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{Na}_{2} \mathrm{O}(s)$$ a. How many grams of $\mathrm{Na}_{2} \mathrm{O}$ are produced when $57.5 \mathrm{~g}$ of $\mathrm{Na}$ reacts? b. If you have $18.0 \mathrm{~g}$ of $\mathrm{Na}$, how many grams of $\mathrm{O}_{2}$ are needed for the reaction? c. How many grams of $\mathrm{O}_{2}$ are needed in a reaction that produces $75.0 \mathrm{~g}$ of $\mathrm{Na}_{2} \mathrm{O} ?$

Sodium reacts with oxygen to produce sodium oxide.
$$4 \mathrm{Na}(s)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{Na}_{2} \mathrm{O}(s)$$
a. How many grams of $\mathrm{Na}_{2} \mathrm{O}$ are produced when $57.5 \mathrm{~g}$ of $\mathrm{Na}$ reacts?
b. If you have $18.0 \mathrm{~g}$ of $\mathrm{Na}$, how many grams of $\mathrm{O}_{2}$ are needed for the reaction?
c. How many grams of $\mathrm{O}_{2}$ are needed in a reaction that produces $75.0 \mathrm{~g}$ of $\mathrm{Na}_{2} \mathrm{O} ?$

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Key Concepts

Balanced Chemical Equation

A balanced chemical equation shows the conservation of mass by having the same number of atoms for each element on both sides of the reaction. It provides the stoichiometric coefficients that indicate the ratio in which reactants combine and products form, which is essential for any quantitative chemical calculation.

Mole Concept

The mole is a fundamental unit in chemistry used to quantify the amount of substance. It links the microscopic scale of atoms and molecules to macroscopic amounts in grams by utilizing Avogadro's number, allowing chemists to convert between the number of particles and the mass of material.

Molar Mass

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It serves as a conversion factor between the mass of a substance and the number of moles, enabling calculations that connect measured masses to the amounts specified in chemical equations.

Stoichiometry

Stoichiometry involves using the balanced chemical equation to relate the amounts of reactants and products. By using the mole ratios from the balanced equation, one can calculate how much of one substance is produced or required given a certain quantity of another substance, ensuring that the law of conservation of mass is upheld.

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