Question detail

How many grams of sodium chloride (NaCl) are needed to make 0.5 moles of the compound?

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 g

The relative formula mass of sodium chloride (NaCl) is 58 g/mol. Using the formula mass = moles x Mr, we find that 0.5 mol x 58 g/mol = 29 g.

Using Incorrect Ratios

Students often confuse the ratios of reactants and products in a balanced equation, applying mass ratios instead of mole ratios.

Always refer to the coefficients in the balanced equation to determine mole ratios, and remember that these ratios are not the same as mass ratios.

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