BF3 acts as a Lewis acid when it accepts the lone pair of electrons that NH3 donates.
Answer:
c) It describes the affinity an atom has for an electron.
Explanation:
C quite literally describes what electronegativity is, you can rule out most others by looking at periodic trends as attached below.
It would typically be around 5000 seconds(83.33) minutes for the water to freeze.
For the very last question you would first divide 8,900 by 12 and the number you get will be the answer. You should get 741.66