👉 In the context of chemistry, a foilable substance is one that can be formed by reacting with other substances to form a single compound. This means that the reaction must involve the formation of water (H2O) as a limiting reagent. For example, if you have a mixture of hydrogen and oxygen gas, and you want to combine them to form a solid hydrogen oxide (H2O), then one possible way to do this is by forming a water molecule (H2O) from
