Idon't seem to understand how to solve this one question, can anyone pease me out?

the answer is A. 25.0m³

you had 50.0 cubic meters at a temperature of 600k

then  its lowered to 300k which is half the number of 600k

so all you have to do is divide 50 by 2 which is 25

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.