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Chemistry
GCSE

Compare and contrast the structure and bonding of diamond and graphite.

1 mark each for each of these points:similarities:only contain carbon atomsatoms covalently bonded to each otherlattice structuredifferences:diamond has four covalent bonds and graphite has threediamond h...

Answered by Annabel C. Chemistry tutor
3524 Views

During a chemical reaction, a student uses a catalyst. What is meant by the term "catalyst"?

A catalyst is something that increases the rate of a reaction without being used up itself. At the end of the reaction, the catalyst remains unchanged.

Answered by Georgie R. Chemistry tutor
1425 Views

Why does Sodium Chloride have high melting point?

Sodium Chloride has a high melting point, as it has a giant ionic lattice hence has strong electrostatic forces of attraction between oppositely charged ions, which requires lots of energy to overcome the...

Answered by Vithullan S. Chemistry tutor
2297 Views

Define an isotope.

Compounds with the same molecular formula but have different structural formulas.

Answered by Shivani S. Chemistry tutor
1902 Views

What is the relative molecular mass of ammonia?

Ammonia is NH3.
Nitrogen has a relative atomic mass of 14.
Hydrogen has a relative atomic mass of 1.
14 + (3 x 1) = 17
Ammonia has a relative molecular mass of 17.

Answered by Adam C. Chemistry tutor
32129 Views

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