What is the mass in grams of each of the following samples? (a) 0.0015 mol of sodium

Verified step by step guidance

1. Identify the molar mass of sodium (Na) from the periodic table. Sodium has a molar mass of approximately 22.99 g/mol.
2. Use the formula: \( \text{mass} = \text{moles} \times \text{molar mass} \).
3. Substitute the given number of moles (0.0015 mol) and the molar mass of sodium (22.99 g/mol) into the formula.
4. Calculate the product of the moles and the molar mass to find the mass in grams.
5. Ensure the units are consistent and the final answer is in grams.

Key Concepts

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For sodium (Na), the molar mass is approximately 22.99 g/mol. This value is essential for converting between moles and grams, allowing us to determine the mass of a given number of moles of a substance.

Conversion from Moles to Grams

To find the mass of a substance in grams from its amount in moles, the formula used is: mass (g) = moles × molar mass (g/mol). This straightforward calculation is fundamental in stoichiometry, enabling chemists to relate the amount of a substance to its mass in practical applications.

Stoichiometry

Stoichiometry is the area of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It involves using balanced chemical equations to calculate the amounts of substances involved, which is crucial for solving problems related to mass and moles in chemical reactions.