Density of liquid= 
.
so, density of liquid= 
= 1.2 gm/cm³.
The statement that correctly describes the reaction is: Tungsten (W) changes oxidation numbers from +6 to zero, so it undergoes reduction.
<h3>WHAT IS
OXIDATION AND REDUCTION:</h3>
- Oxidation is the process whereby electrons are lost in a reaction while reduction involves the gain of electrons.
- According to this question, the following reaction is given: WO3(s) + 3H2(g) → W(s) + 3H2O(g)
- Tungsten has an oxidation number of +6 in WO3 and it is changed to 0 in W, hence, there is a gain of electrons by tungsten (W).
Therefore, the statement that correctly describes the reaction is: Tungsten (W) changes oxidation numbers from +6 to zero, so it undergoes reduction.
Learn more about oxidation-reduction reaction at: brainly.com/question/3867774
Spring a has more potential energy then spring b
Explanation:
For the given values of 
we will have the values of 
as follows.
As, 
Therefore,
= 2.15, 
= 7.20
= 12.38
Now, at pH 6.50
; 
At pH = 2.15; 
; 
At pH 7.20; 
; 
Hence, we can conclude that most abundant species is 
and the second most abundant species is 
.
