Some iron wire weighing 5.6-g is placed in a beaker and covered with 15.0-g dilute hydrochloric acid. The acid reacts with the metal and gives off hydrogen gas, which escapes into the surrounding air. After the reaction, the contents of the beaker weigh 2.4-g. What is the mass of hydrogen gas produced by the reaction? Fe + HCI 5.6g 15.0g → H2 ? Your answer