Some iron wire with a mass of 5.6 g is placed in a beaker and covered with 15.0 g of dilute hydrochloric acid. The acid reacts with the metal to produce Ferric chloride and gives off hydrogen gas, which escapes into the surrounding air. After reaction, the ferric chloride in the beaker has a mass of 20.4 g. What is the mass of hydrogen gas produced by the reaction?

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.