Mass =?
moles of N2 = 4.25 x 103 mol
molar mass of N2 = (14)x2 = 28
I believe the answer would be C, unbalanced.
Since the forces are in opposite directions, and aren't the same size, the answer would be unbalanced.
Answer:
I'm pretty sure its solid
When you add heat to a solid the particles gain energy and start to vibrate faster and faster.
When you add heat to a liquid the particles are given more energy and move faster and faster expanding the liquid.