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State the crystal structures of SiO2 and CO2 and why one has a higher melting point than the other.

SiO2 forms a giant covalent structure while CO2 has a simple molecular structure.In the giant covalent structure of SiO2, strong covalent bonds hold the atoms together in...

FT
Answered by Fabian T. Chemistry tutor
32661 Views

I do 400J of work compressing a gas, but I maintain the same temperature. What is the delta U, Q and W in this case?

U = 0Q = -400W = -400

HC
Answered by Helen C. Physics tutor
2349 Views

Outline the problem of evil and one possible response to it.

The problem of evil is one that is often thought to come in two forms - the logical and the evidential - both of which arrived at due to the Christian devotion to the idea of a God of all perfections (i.e...

TH
4443 Views

What is the male role in Federico Garcia Lorca's play, 'La Casa de Bernarda Alba'?

Possible answers: The fact that male characters never appear on stage is perhaps reflective of the social context whereby despite their absence, they maintain a certain superiority and power over the fema...

CB
Answered by Claire B. Spanish tutor
11811 Views

What is the difference between the 'passé composé' and 'imparfait' tenses?

While both tenses are used to talk about actions that have taken place in the past. The passé composé and imparfait tenses are distinct. The best way to distinguish them is to consider w...

KC
Answered by Kaeshelle C. French tutor
1951 Views

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