Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
10th September 2024
- 1Chemical Bonding: Ionic, Covalent and Metallic
Why can metals conduct electricity when solid?
- 2Structures, Properties and Nanoparticles
Why do polymers have higher melting points than small molecules such as methane?
- 3Quantitative Chemistry
A sealed flask containing 12.0 g of reactants is shaken and a reaction occurs. What is the total mass afterwards?
- 4Moles, Formulae and Equations
Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)
- 5Concentration, Yield and Atom Economy
State two reasons why a percentage yield is less than 100 percent.
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