Answer:
A.
Explanation:
In the case of a seesaw, the object at the top is the effort and the object at the bottom is the load.
Answer:

Explanation:
Hello there!
In this case, according to the reaction:

Thus, since there is a 4:2 mole ratio of P to P2Cl5 and the molar mass of the later is 239.2125 g/mol, we obtain the following mass as the produced one:

Regards!
Just use q=mCDeltaT
q=energy
m=mass
c=specific heat
Delta T= Change in temperature
I think the answer would be A ! Hope this helps