A mass spectrometer

• Resources Structure
• Key Stage 4
• Chemistry
• VI. Quantitative aspects of chemical reactions
• 31. The mole

• Exam Specifications
• Key Stage 4
• AQA GCSE Science A (4461) Chemistry
• III. Additional materials
• 1. Additional materials
• Additional materials
• AQA GCSE Additional Science (4463) Chemistry
• I. Chemistry 2
• 3. How much can we make and how much do we need to use?
• to calculate chemical quantities involving empirical formulae reacting masses and percentage yield
• The relative atomic mass of an element (Ar) compares the mass of atoms of the element with the 12C isotope. It is an average value for the isotopes of the element.
• The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula.
• The relative formula mass of a substance, in grams, is known as one mole of that substance.
• AQA GCSE Chemistry (4421)
• II. Chemistry 2
• 18. How much can we make and how much do we need to use?
• to calculate chemical quantities involving empirical formulae, reacting masses and percentage yield
• The relative atomic mass of an element (Ar) compares the mass of atoms of the element with the 12C isotope. It is an average value for the isotopes of the element.
• The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula.
• The relative formula mass of a substance, in grams, is known as one mole of that substance.

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