For number two, the equation is balanced. Na in the reactant side has one atom and also in the product side. O has only one atom in the product and in the reactant. There are 2H’s in the reactant and in the product side (present in H2O, the 2 in H stands for 2 atoms of H). One atom of Cl is present in the reactant and product side.
For number three, the reactants are NaOH-sodium hydroxide and HCl-hydrogen chloride(hydrochloric acid). The products are NaCl-sodium chloride and H2O-water.
Answer:
Exothermic
Explanation:
An exothermic reaction is defined as a reaction where heat/energy is released. In the formation of rust, iron reacts with oxygen gas to form ferric oxide and energy. Energy in the products side indicates a release of energy, thus making this reaction exothermic.
The yellow element that stinks when burned is sulfur.
Sulfur is a chemical element with the symbol S and atomic number 16. It is a non-metal that is a member of the chalcogen group in the periodic table. Sulfur is a yellow solid at room temperature. It is insoluble in water but soluble in carbon disulfide. When sulfur is burned, it produces a foul-smelling gas called sulfur dioxide.
Sulfur dioxide is a colorless gas with a pungent, irritating odor. It is a major air pollutant and can cause respiratory problems. Sulfur is used in a variety of applications, including the production of sulfuric acid, gunpowder, and rubber. It is also used in the vulcanization of rubber. Sulfur dioxide is a highly reactive gas. Sulfur dioxide has a low boiling point. Sulfur dioxide is heavier than air.
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