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Chemistry

A Level

What is the electron arrangement for a Co atom?

Look up Co on the periodic table. Proton number is 27. Therefore, the number of electrons is 27.

1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁷, 4s

Answered by Emma P. • Chemistry tutor

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What are buffers and how do they work?

Buffers are solutions of acid and base which work to minimise changes in pH following the addition of small amounts of acid or base. Ideal buffers are made of a weak acid (i.e. one which does not fully di...

Answered by Samuel J. • Chemistry tutor

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Which compound has a higher boiling point and why: water (H2O) or methane (CH4)?

Water has a higher boiling point because the hydrogen bonds that form among water molecules are stronger than the Van der Waals interactions among methane molecules, thus more energy must be provided in o...

Answered by Maria D. • Chemistry tutor

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In terms of the structure and boiling point of graphite, explain why the melting point is high

Each carbon atom in graphite is bonded to three other carbon atoms. These carbon atoms are linked by covalent bonds - which are very strong. Graphite is arranged in sheet like structures and between each ...

Answered by Tinashe M. • Chemistry tutor

45141 Views