Answer:
C. It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.
Explanation:
- Diamond is composed solely by carbon atoms. As the difference of electronegativity between atoms is 0, diamond is a <em>fully covalent compound</em>.
- The lack of electrical conductivity stems from a<em> lack of available electrons</em>, this means that there are no delocalised electrons.
The information in the first point discards options A and D, while the second point discards option B. Thus the answer is option C.
Answer:
True
Explanation:
Hardness is defined as the ability of a substance to resist being scratched. It can be described using Moh's scale
From the given, we can note that the material with hardness 8 has more resistance to being scratched that a material with hardness 7.
This means that if these two substances came in contact, the more hard substance will scratch the less hard substance.
Hope this helps :)
Answer:
no
Explanation:
that is a molecular formula
Answer: 1.5 moles O2
Explanation:
The number of moles of each reactant and product is the number in front to the molecule when the equation is balanced.
You know that 1 mole of O2 gives you 2 moles of H2O
So you can set up a proportion using that.
1 mole O2. X moles O2
-------------- = -------------------
2 moles H2O. 3 moles H2O
Then cross multiply
2x=3
X=3/2 Or 1.5
So you need 1.5 moles O2 to get 3 moles of H2O.