All Quantitative chemistry and stoichiometry articles – Page 8
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ResourceOn This Day – Jul 13 : Cannizzaro was born
He was the first chemist to see the full significance of Avogadro’s law. In the 1850s, Cannizzaro suggested comparing everything to the mass of a hydrogen (H) atom. This helped chemists establish chemical formulae and make reliable chemical calculations.
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ResourceOn This Day – Jul 09 : Amedeo Avogadro died
His hypothesis – now known as Avogadro’s Law – states that equal volumes of gases at a given temperature and pressure contain the same number of molecules. This is now widely accepted, and the number of molecules in a mole is referred to as Avogadro’s number, 6.023 x 1023.
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ResourceOn This Day - Jun 13 : James Maxwell was born
Maxwell helped to formulate electromagnetic theory, which links magnetism, electricity and light. He also investigated the kinetic theory of gases and developed part of the Maxwell-Boltzmann distribution, which helps scientists to understand the effects of temperature on reaction rates.
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ResourceSchools’ Analyst past papers 2012
Investigate the amount of active ingredient in aspirin tablets, paracetamol tablets and cold and flu remedies.
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Resource28 o bosau cemeg i fyfyrwyr 14–16 oed
Defnyddiwch y posau hyn, sydd wedi’u hysbrydoli gan sudoku, ynghyd â’r taflenni gwaith a’r atebion y gallwch eu hargraffu, i helpu pobl ifanc 14–16 oed i gyfnerthu eu dealltwriaeth o gysyniadau cemegol allweddol.
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Resource28 chemistry puzzles for 14-16 years
Use these sudoku-inspired puzzles with printable worksheets and answers to help 14–16 year olds consolidate their understanding of key chemical concepts.
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Exhibition chemistryFloating Gas Bubbles
Demonstrations designed to capture the student's imagination
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FeatureCatalysts for a green industry
Chemists are working to develop new, longer-lasting catalysts to ensure industrial processes are cleaner, greener and more efficient
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Lesson planHow does burning magnesium affect its mass? | 11-14 years
Investigate what happens to the mass of magnesium when it burns and reacts with oxygen using this lesson plan and practical activity for 11–14 year olds.
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Exhibition chemistryA spectacular reversible reaction
A demonstration with a dramatic colour change