Question detail

What mass of sodium chloride (NaCl) is needed to have 0.5 moles? The relative formula mass (Mr) of NaCl is 58.5 g/mol.

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Use of amount of substance in relation to masses of pure substances

Question

29.25 g

The mass is calculated using the formula mass = moles x Mr. Here, mass = 0.5 mol x 58.5 g/mol = 29.25 g.

Decimal Misinterpretation

Students often misinterpret decimal values in mole calculations, treating them as whole numbers.

To fix this, practice converting decimal values into fractions or ensure proper decimal placement when calculating moles.

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