Given the mass in grams of a substance in a reaction,...

Given the mass in grams of a substance in a reaction, calculate the mass in grams of another substance in the reaction. Calcium cyanamide reacts with water to form calcium carbonate and ammonia. $$ \mathrm{CaCN}_{2}(s)+3 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{CaCO}_{3}(s)+2 \mathrm{NH}_{3}(g) $$ a. How many grams of $\mathrm{H}_{2} \mathrm{O}$ are needed to react with $75.0 \mathrm{g}$ of $\mathrm{CaCN}_{2} ?$ b. How many grams of $\mathrm{NH}_{3}$ are produced from $5.24 \mathrm{g}$ of $\mathrm{CaCN}_{2} ?$ c. How many grams of $\mathrm{CaCO}_{3}$ form if $155 \mathrm{g}$ of $\mathrm{H}_{2} \mathrm{O}$ reacts?

Given the mass in grams of a substance in a reaction, calculate the mass in grams of another substance in the reaction.
Calcium cyanamide reacts with water to form calcium carbonate and ammonia.
$$
\mathrm{CaCN}_{2}(s)+3 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{CaCO}_{3}(s)+2 \mathrm{NH}_{3}(g)
$$
a. How many grams of $\mathrm{H}_{2} \mathrm{O}$ are needed to react with $75.0 \mathrm{g}$ of $\mathrm{CaCN}_{2} ?$
b. How many grams of $\mathrm{NH}_{3}$ are produced from $5.24 \mathrm{g}$ of $\mathrm{CaCN}_{2} ?$
c. How many grams of $\mathrm{CaCO}_{3}$ form if $155 \mathrm{g}$ of $\mathrm{H}_{2} \mathrm{O}$ reacts?

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Key Concepts

Balanced Chemical Equation

A balanced chemical equation represents all reactants and products with equal numbers of each type of atom on both sides of the reaction. This balance provides the stoichiometric coefficients that indicate the mole ratios used to convert from one substance’s amount to another during calculations.

Molar Mass

The molar mass is the mass of one mole of a substance, usually expressed in grams per mole. It is a crucial conversion factor that allows us to convert between the mass of a substance and the number of moles, enabling stoichiometric calculations.

Mole Concept

The mole is a key unit in chemistry that quantifies the amount of substance by relating the number of particles to a given mass. Understanding the mole concept is essential for converting masses of reactants and products in a chemical reaction.

Stoichiometry

Stoichiometry involves the quantitative relationships between reactants and products in a chemical reaction. By using the balanced chemical equation, mole ratios, and molar masses, one can calculate how much of each substance is required or produced in the reaction.

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