B. It would have a net force of 200N to the left. Meaning the the forces are unbalanced and the net force would cause it to accelerate (speed up) in the direction of the net force.
The answer is that “chlorine has a greater electron affinity
than sodium does”. Sodium has a lesser electron affinity than Chlorine, which
is why it is deliberated that Chlorine is much more suitable to be existent as
an anion than sodium, due to the lack of its electron affinity.
Not 100% sure, but I'd have to say this:
When rounding for sig figs, you look at the other numbers in your calculation and see which one has the least amount of sig figs. This number is 2.70. (3 sig figs). So, you round to 3 significant figures in your calculation.
Hope this helped!
I think for A and B you got the correct answer but for C I got a difference answer.
