Answer:
o increase the rate of chemical reaction
Explanation:
Enzymes are chemical catalysts that speed up chemical reactions by lowering their activation energy. Enzymes have an active site with a unique chemical environment that fits particular chemical reactants for that enzyme, called substrates. Enzymes and substrates are thought to bind according to an induced-fit model.
Answer:
Explanation:
Since we are not given the mole fraction of ethanol and water; we will solve this theoretically.
Using Raoult's Law:
For water:

where
of water = 12.5 mmHg
Then, the vapor pressure of water:

For ethanol:

and the
of ethanol = 32.1 mmHg
Then, the vapor pressure of ethanol:

The total vapor pressure 
The total vapor pressure = 
It has a definite volume but not a definite shape
Answer:
Electronegativities generally increase from left to right across a period
Therefore the answer is B.