1. Which set of diagrams shows a balanced chemical equation? А
Reactants
Products
H
o
s
S
H
н
O
o
S
s s
B
Reactants
Products
H
H
н
Н
o
s
S s
H
H
H
H
o
o
s
С
Reactants
Products
H
H
H
H
o
S
S
HH
H
H
o
o
S
S
S
D
Reactants
Products
H
H
O O
O A. Diagram A
O B. Diagram B
O C. Diagram
O D. Diagram D

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.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

i think its 100.

hope this !