QUESTION: Fix punctuation: 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
ANS: 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.

QUESTION: Fix punctuation: The featured China GuangDong ledwallwasher lww272p manufacturers and listed here are sourced by the karnar lighting
ANS: The featured China GuangDong led-wall-washer lww-2-72p manufacturers and listed here are sourced by the karnar lighting.

QUESTION: Fix punctuation: This area is also where most bars discos and shops are located on the sunset strip along the coast
ANS: This area is also where most bars, discos and shops are located - on the sunset strip along the coast.

QUESTION: Fix punctuation: The 8th session of the ACPEU Joint Parliamentary Assembly is held in The Hague
ANS:
The 8th session of the ACP-EU Joint Parliamentary Assembly is held in The Hague.