Determine the mass of each of the following: (a) 2.345 mol...

Determine the mass of each of the following: (a) 2.345 mol LiCl (b) 0.0872 mol acetylene, $\mathrm{C}_{2} \mathrm{H}_{2}$ (c) $3.3 \times 10^{-2} \mathrm{mol} \mathrm{Na}_{2} \mathrm{CO}_{3}$ (d) $1.23 \times 10^{3}$ mol fructose, $C_{6} \mathrm{H}_{12} \mathrm{O}_{6}$ (e) 0.5758 mol $\mathrm{FeSO}_{4}\left(\mathrm{H}_{2} \mathrm{O}\right)_{7}$

Determine the mass of each of the following:
(a) 2.345 mol LiCl
(b) 0.0872 mol acetylene, $\mathrm{C}_{2} \mathrm{H}_{2}$
(c) $3.3 \times 10^{-2} \mathrm{mol} \mathrm{Na}_{2} \mathrm{CO}_{3}$
(d) $1.23 \times 10^{3}$ mol fructose, $C_{6} \mathrm{H}_{12} \mathrm{O}_{6}$
(e) 0.5758 mol $\mathrm{FeSO}_{4}\left(\mathrm{H}_{2} \mathrm{O}\right)_{7}$

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Key Concepts

Mole Concept

The mole is a fundamental chemical unit that represents a specific number of entities, typically atoms, molecules, or ions, equivalent to Avogadro’s number (approximately 6.022 x 10^23). It is a bridge between the atomic scale and grams measurable in the laboratory, allowing chemists to count particles by weighing them.

Molar Mass

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a compound, providing a crucial conversion factor to convert between the amount of substance (in moles) and its mass.

Dimensional Analysis

Dimensional analysis is the process of converting one unit of measurement to another using conversion factors. In the context of these problems, it involves using the molar mass as a conversion factor to change a quantity in moles to a mass in grams, ensuring that units cancel appropriately.

Scientific Notation

Scientific notation is a method of expressing very large or very small numbers in the form of a base number multiplied by a power of ten. This notation is particularly useful in chemistry for handling quantities like moles and atomic masses, which can span many orders of magnitude.

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