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===About Relative Formula Mass===
: The '''relative formula mass''' is used to find the [[mass]] of a [[molecule]] needed to perform a complete [[Chemical Reaction|reaction]] with another [[chemical]].
===Calculating Relative Formula Mass===
: '''Relative formula mass''' can be calculated from the [[Chemical Formula|chemical formula]] of the [[molecule]] and the [[Relative Atomic Mass|relative atomic mass]] of the [[element]]s.
{| class="wikitable"|-| style="height:20px; width: The 200px; text-align:center;" |Find the '''relative formula mass''' is used to find of O<sub>2</sub>.| style="height:20px; width:200px; text-align:center;" |Find the '''relative formula mass''' of CO<sub>2</sub>| style="height:20px; width:200px; text-align:center;" |Find the '''relative formula mass''' of C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>|-| style="height:20px; width:200px; text-align:left;" |[[massRelative Atomic Mass]] of a [[moleculeOxygen]] = 16g No. [[Oxygen]] [[atom]]s = 2 [[Relative Formula Mass]] needed to perform a complete of O<sub>2</sub> = 16x2 [[Chemical ReactionRelative Formula Mass]] of O<sub>2</sub> = 32g | style="height:20px; width:200px; text-align:left;" |reaction[[Relative Atomic Mass]] of [[Carbon]] = 12g [[Relative Atomic Mass]] with another of [[chemicalOxygen]]= 16g No.[[Carbon]] [[atom]]s = 1 No. [[Oxygen]] [[atom]]s = 2 [[Relative Formula Mass]] of CO<sub>2</sub> = 12x1 + 16x2 [[Relative Formula Mass]] of CO<sub>2</sub> = 44g | style="height:20px; width:200px; text-align:left;" |[[Relative Atomic Mass]] of [[Carbon]] = 12g [[Relative Atomic Mass]] of [[Hydrogen]] = 1g [[Relative Atomic Mass]] of [[Oxygen]] = 16g No. [[Carbon]] [[atom]]s = 6 No. [[Carbon]] [[atom]]s = 12 No. [[Oxygen]] [[atom]]s = 6 [[Relative Formula Mass]] of C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> = 12x6 + 1x12 + 16x6 [[Relative Formula Mass]] of C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> = 180g|}