B. positive because y increases as x does. It it were negative y would decrease as x increases and it would be 0 if y stayed the same as x increases.
Pretty sure it's b but not an definitely
Answer: There are
atoms in 24 moles of Fe.
Explanation:
According to the mole concept, 1 mole of a substance contains
atoms.
Therefore, atoms present in 24 moles of Fe are calculated as follows.

Thus, we can conclude that there are
atoms in 24 moles of Fe.
Answer:
C. The thermal energy of a substance.
Explanation:
Hope it helps.