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

Hard

An investigator studied the reaction of heated aluminium foil with oxygen gas in a crucible.

The word equation for the reaction is: $oxide\text{aluminium} + \text{oxygen} \rightarrow \text{aluminium oxide}$

The measurements recorded during the experiment are as follows:

	Mass in $g\text{g}$
Crucible	$18.50$
Crucible and aluminium foil	$21.20$
Crucible and aluminium oxide	$23.60$

Calculate the simplest whole number ratio of: $atoms\text{moles of aluminium atoms} : \text{moles of oxygen atoms}$

Determine the balanced chemical equation for this reaction.

Relative atomic masses ( $A_r$ ): $O=16\text{O} = 16$ , $Al=27\text{Al} = 27$

[6]

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