What is the mass in grams of 5.40 moles of lithium (Li)?

• A. 15.6 g
• B. 46.8 g
• C. 29.2 g
• D. 37.4 g

Answer: (D)

Verified step by step guidance

1. Identify the given quantity and what is asked: You have 5.40 moles of lithium (Li) and need to find the mass in grams.
2. Recall the molar mass of lithium (Li) from the periodic table. The molar mass is the mass of one mole of lithium atoms, typically expressed in grams per mole (g/mol).
3. Use the formula relating moles, molar mass, and mass: \(\\text{mass (g)} = \\text{moles} \\times \\text{molar mass (g/mol)}\).
4. Substitute the given number of moles (5.40 moles) and the molar mass of lithium into the formula.
5. Multiply the values to find the mass in grams, which will give you the mass of 5.40 moles of lithium.