Home › WAEC WASSCE › Chemistry › Stoichiometry of Chemical Reactions › What does the stoichiometry of a reaction descri…
What does the stoichiometry of a reaction describe?
AThe speed at which the reaction happens
BThe heat given out during the reaction
CThe states of matter of the substances
DThe relations between amounts of substances
Answer & Solution
Correct answer: D. The relations between amounts of substances
1. Stoichiometry comes from Greek words meaning element and measure.
2. It covers the quantitative relations between the amounts of reactants and products.
3. Those relations come from the coefficients of the balanced equation.
4. Reaction speed and heat output are separate properties and are not what stoichiometry means.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 4 "Stoichiometry of Chemical Reactions", section 4.3 Reaction Stoichiometry_
Related questions
In the reaction between sodium and chlorine, sodium is oxidised, which means chlorine:Ordering the three ways of writing a reaction from most to least detail about ions gives:When one element appears in more than one formula on the same side of an equation, you musWhen balancing a combustion equation, an odd number of oxygen atoms on the product side isCompounds that produce hydroxide ions by chemically reacting with water, rather than by diA double arrow is used in an acid equation to indicate that the acid is:A neutralisation reaction has an acid and a base as reactants and typically produces:Sodium hydroxide is classified as a strong base because in water it: