They should observe the production of bubbles effervescence and also that magnesium reacts more strongly producing more heat and more bubbles with acid than iron does although less acid is used We explain to our students that the gas produced is hydrogen

Could you correct the punctuation please?
They should observe the production of bubbles (effervescence) and also that magnesium reacts more strongly (producing more heat and more bubbles) with acid than iron does although less acid is used. We explain to our students that the gas produced is hydrogen.