Daily Practice · GCSE Science

Daily Practice - GCSE Science

27th March 1999

5 questions · GCSE · 584 questions in this band

1
Bonding, Structure and Properties of Matter
Explain why sodium chloride conducts electricity when molten but not when solid.
2
Chemical Bonding: Ionic, Covalent and Metallic
Why can metals conduct electricity when solid?
3
Structures, Properties and Nanoparticles
Why do polymers have higher melting points than small molecules such as methane?
4
Quantitative Chemistry
A sealed flask containing 12.0 g of reactants is shaken and a reaction occurs. What is the total mass afterwards?
5
Moles, Formulae and Equations
Calculate the number of moles in 88 g of carbon dioxide. (Mr = 44)

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