Answer:
Bicarbonate buffer system
Explanation:
The human body uses a bicarbonate buffer system to maintain blood pH at a reasonable level. Without it, we'd be dead.
Answer:

Explanation:
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In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:

Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:

Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:

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Answer:
Transition metals can have multiple oxidation states because of their electrons. The transition metals have several electrons with similar energies, so one or all of them can be removed, depending the circumstances. This results in different oxidation states. please mark me as brainellist