How many moles are present in 55 g of NaCl?

• A. 1.5 moles
• B. 0.94 moles
• C. 0.47 moles
• D. 2.1 moles

Answer: (B)

Verified step by step guidance

1. Identify the given quantity and what is asked: You have 55 grams of NaCl and need to find the number of moles.
2. Recall the formula to convert grams to moles: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
3. Calculate the molar mass of NaCl by adding the atomic masses of sodium (Na) and chlorine (Cl): \(\text{Molar mass of NaCl} = 22.99 + 35.45\) g/mol.
4. Substitute the values into the formula: \(\text{moles} = \frac{55}{\text{molar mass of NaCl}}\).
5. Perform the division to find the number of moles present in 55 g of NaCl.