Convert the mass of your limiting reactant to a number of moles.

Answer 1

To convert the mass of any substance to moles, use the given mass and its molar mass as shown in the example below.

Example:

The limiting reactant in a chemical reaction is determined to be #"NaCl"#. The mass of the #"NaCl"# is #"4.50 g"#. The molar mass of #"NaCl"# is #"58.44 g/mol"#. Convert the mass into moles.

#"4.50 g NaCl"# x #"1 mol NaCl"/"58.44g NaCl"# = #"0.0770 mol NaCl"#

Here is a video which discusses how to determine limiting reactants.

video from: Noel Pauller

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Answer 2

Owen Ambrose

To convert the mass of the limiting reactant to moles, use the formula: moles = mass / molar mass of the substance.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.