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  1. How many grames are in 0.25 moles of NaCl ?
    A. 5.85 g
    B. 14.6 g
    C. 29.25 g
    D. 88.5 g

Ask by Daniel Lane. in the United States
Jan 24,2025

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The mass of 0.25 moles of NaCl is 14.6 grams.

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To find the grams in 0.25 moles of NaCl, you first need to determine the molar mass of NaCl. Sodium (Na) has a molar mass of about 22.99 g/mol, and Chlorine (Cl) has a molar mass of about 35.45 g/mol. When you add those together, NaCl has a molar mass of roughly 58.44 g/mol. So, you multiply 0.25 moles by 58.44 g/mol, which gives you approximately 14.6 grams. Thus, the correct answer is B.
Using the formula for moles (moles = grams/molar mass), it’s easy to see where mistakes might occur. A common error is forgetting to sum the molar masses correctly or not using the proper units. Always double-check your calculations, and don’t forget to ensure you’re using the correct number of significant figures in your final answer!

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