A good contract bookkeeper is able to: 1  Set up accounting systems and software properly. 2  Enter transactions. 3  Perform checks, reconciliations and end of year processes.  Ensure they are up to speed with legislative requirements and management 1  reports. Undertake payroll duties and compliance.
An active metal is a metal that displaces hydrogen from an acid. Examples of active metals include magnesium, zinc and iron. This type of reaction is also called a single displacement reaction where the active metal 'displaces' the hydrogen from the acid. Examples of reactions involving acids and active metals. 1  Hydrochloric acid + Magnesium â Magnesium chloride + Hydrogen.
When magnesium is ignited, it is readily oxidized by oxygen in the air producing an incredibly bright light and intense heat. 2Mg (s) + O2 (g) â 2MgO (s) Chemical Change / Color Change / Energy Transformations / Exothermic Reactions / Lesson Plans / Light / Synthesis Reactions.