Why do we need to convert mass to moles in stoichiometry problems?

Answer 1

Because we need to establish equivalence. Reacting molecules have specific masses.

We depict the fundamental chemical reaction of molecules, that is to say:

#H_2(g) + 1/2O_2(g) rarr H_2O(l)#

But we perform a chemical reaction on the basis of grams and litres. Here #2*g# of dihydrogen gas reacts with #16.0*g# dioxygen gas to give #18.0*g# water. Moles to mass and mass to moles conversions are thus vital to ideas of equivalence.

The chemical equation remains the starting point, but the masses of the reactants and products are distinct and quantifiable.

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Answer 2

Jeremiah Adams

Converting mass to moles in stoichiometry allows for consistent comparison of reactants and products based on their molar quantities.

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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.