How many moles of KCl will be produced from the decomposition of 5.0 grams of KClO3.

Answer

Decomposition of KClO  

3

​  

 takes place as:

2KClO  

3

​  

(s)→2KCl(s)+3O  

2

​  

(g)

2 mole of KClO  

3

​  

=3 mole of O  

2

​  

∵ 3 mole O  

2

​  

 formed by 2 mole KClO  

3

​  

∴2.4 mole of O  

2

​  

 will be formed by:

(  

3

2

​  

×2.4) mol KClO  

3

​  

= 1.6 mole of KClO  

3

​  

.  

Mass of KClO  

3

​  

 = Number of moles ×  Molar mass  

=1.6×122.5=196g

h let me think

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.