Difference between revisions of "Relative Formula Mass"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | The '''relative formula mass''' ('''M<sub>r</sub>''') of a [[molecule]] is the [[mass]] of one [[mole]] ([[Avagadro Constant|6.02x10<sup>23</sup>]]) of the [[molecule]]. | + | The '''relative formula mass''' ('''M<sub>r</sub>''') of a [[molecule]] is the [[mass]] of one [[mole]] ([[Avagadro Constant|6.02x10<sup>23</sup>]] [[atom]]s) of the [[molecule]]. |
===About Relative Formula Mass=== | ===About 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. | : '''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. | ||
: The '''relative formula mass''' is used to find the [[mass]] of a [[molecule]] needed to perform a complete [[Chemical Reaction|reaction]] with another [[chemical]]. | : The '''relative formula mass''' is used to find the [[mass]] of a [[molecule]] needed to perform a complete [[Chemical Reaction|reaction]] with another [[chemical]]. | ||
Revision as of 19:07, 2 January 2019
Key Stage 4
Meaning
The relative formula mass (Mr) of a molecule is the mass of one mole (6.02x1023 atoms) of the molecule.
About Relative Formula Mass
- Relative formula mass can be calculated from the chemical formula of the molecule and the relative atomic mass of the elements.
- The relative formula mass is used to find the mass of a molecule needed to perform a complete reaction with another chemical.