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Why is SiO2 a solid whereas CO2 is a gas at room temeperature?

The main factor influencing a given compound's state is the strength of intermolecular forces - those need to be larger than the thermal energy for a compound to be solid/liquid. For CO2 the only type of int...
WG
8190 Views

Find the cross product between two unit vectors a and b.

First write out the unit vectors in I, j, and k form. Then put these values into a matrix. Then find the determinant of the matrix. Then you will have reached your answer. I couldn't figure out how to show t...
NL
Answered by Nicholas L. • Maths tutor
1919 Views

How should I approach primary source material?

It is important to analyse the author of the source first of all. Each person has varying socio-economic backgrounds or political agendas and these are very important in how you should approach the source as...
NB
Answered by Nick B. • History tutor
2467 Views

How do I analyse a source in the exam?

The biggest thing to remember about source questions is that its all in the analysis . You don't need that much specific knowledge to answer a source question, and can even get away with just knowing the bro...
AH
Answered by Abigail H. • History tutor
3708 Views

Explain the bonding in benzene, and hence its greater stability

Benzene consists of six carbon atoms in a hexagonal ring, all of which are sp^2 hybridised. This allows the perpendicularly oriented 'p' orbital of each carbon to overlap laterally all around the ring. The d...
EP
Answered by Ethan P. • Chemistry tutor
3404 Views