Natural gas is a NONRENEWABLE source of energy. All the other ones are renewable.
-Seth
Since Lithium has one valence electron that means it needs to lose it to form a stable structure. That means it's valence is equal to one. Oxygen has six atoms, in order to form a stable octet structure it needs to accept 2 electrons, therefore it's valence is 2.
Therefore two Lithium atoms bond with one oxygen atom to form Li2O
Transport
The protein is working to transport substances across the membrane.
I am not sure but I believe it is B. Precipitation because the definition is: <span>the action or process of precipitating a substance from a solution ^-^ Hope this helps</span>
It must be able to store water for long periods of time