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Why is graphene able to conduct electricity.

Graphene is a giant covalent compound made purely of carbon atoms. Within graphene each carbon atom is covalently bound to just 3 other carbon atoms. A carbon atom usually makes 4 covalent bonds. This means ...
SW
Answered by Stella W. • Chemistry tutor
8998 Views

Describe the differences in properties between diamond and graphite.

Diamond – The electrons are tightly bound between the atoms. Bonds are difficult to break as they are held firmly together hence diamond has a hard structure. Diamond does not have free electrons to carry th...
JG
Answered by Jasmine G. • Chemistry tutor
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How can I work out which gas is released when ethanoic acid is reacted with sodium?

Ethanoic acid is CH 3 COOH. Acids can ionise, producing H + ions and in this case, CH 3 COO (ethanoate) ions. The sodium exists as Na + ions in solution, which then create neutral ion complexes with the etha...
SR
Answered by Sara R. • Chemistry tutor
3114 Views

Calculate the amount of sodium chloride, NaCl, in 55.0cm3 solution with a concentration og 0.5mol/dm3

The amount in moles of a solute in a solution in a given volume of solution can be calculated if the concentration of the solution is also known. The equation for concentration is: Concentration in mol/dm 3 ...
OM
7660 Views

You are given 120g of Calcium. How many moles have you been given? (Ar =40)

Use the equationNumber of moles = Mass / Relative Atomic Mass. Look at what I draw on the whiteboard. It is a formula triangle. This will help you when you have different parts of the equation to get to the ...
SN
Answered by Saba N. • Chemistry tutor
11397 Views