Question detail
What is the mass of 3 moles of sodium chloride (NaCl)? The relative formula mass (Mr) of sodium chloride is 58.5 g/mol.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
What is the mass of 3 moles of sodium chloride (NaCl)? The relative formula mass (Mr) of sodium chloride is 58.5 g/mol.
Answer
175.5 g
Explanation
This question assesses the understanding of how to calculate mass from moles using the relative formula mass. It demonstrates the application of the formula in a practical context.
Common mistake
Confusing Mass and Moles
Students often confuse mass (in grams) with the number of moles when calculating the amount of substance.
Always remember to use the formula: moles = mass / relative formula mass, ensuring you convert mass to the correct unit before calculation.
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