Answer:
Common examples include hydrochloric acid, sulfuric acid, citric acid and ethanoic acid. Bases are a group of substances that neutralise acids. Soluble bases are called alkalis.
Explanation:
Hope this helps.
Alkene is the group of hydrocarbon molecules that contains at least one double bond. So, A, C and D would be named ending with -ene.
Answer: B. Elements are represented by chemical formulas.
Elements are pure substances, which means that they cannot be broken down into simpler substances. The element is the most basic substance that exists, breaking it down further means breaking it down into protons, neutrons, and electrons, which is no longer a substance.
Elements have chemical properties that allow them to form different types of bonds with other elements.
However, elements *alone* are not represented by their chemical formulas. Only chemical bonds or ions are represented by a chemical formula.
<span>The balance format is
4NH3+ 5O2 -------> 4NO + 6H2O </span>
Energy is absorbed to break bonds, and released when bonds are formed.
