Given that the molar mass of RbF is 104.5 g/mol, how many moles of RbF are present in 57.0 grams of RbF?

• A. 1.83 mol
• B. 0.546 mol
• C. 0.546 g
• D. 1.83 g

Answer: (B)

Verified step by step guidance

1. Identify the given information: the mass of RbF is 57.0 grams and the molar mass of RbF is 104.5 g/mol.
2. Recall the formula to calculate moles from mass and molar mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
3. Substitute the given values into the formula: \(\text{moles} = \frac{57.0}{104.5}\).
4. Perform the division to find the number of moles of RbF present in 57.0 grams.
5. Interpret the result as the amount of substance in moles corresponding to the given mass of RbF.