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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 ...

WG
6281 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 sho...

NL
Answered by Nicholas L. Maths tutor
1346 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...

NB
Answered by Nick B. History tutor
1868 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 j...

AH
Answered by Abigail H. History tutor
2326 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. Th...

EP
Answered by Ethan P. Chemistry tutor
2619 Views

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