Answer:
Decreases
Explanation:
An element's oxidation number decreases because it gained electrons.
Answer:
pH = 13.1
Explanation:
Hello there!
In this case, according to the given information, we can set up the following equation:

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

And the resulting concentration of KOH and OH ions as this is a strong base:
![[KOH]=[OH^-]=\frac{0.00576mol}{0.012L+0.032L}=0.131M](https://tex.z-dn.net/?f=%5BKOH%5D%3D%5BOH%5E-%5D%3D%5Cfrac%7B0.00576mol%7D%7B0.012L%2B0.032L%7D%3D0.131M)
And the resulting pH is:

Regards!
The amount of coal burnt each year to produce 8.53 × 10¹⁶ Joule of energy is 2.3 x 10¹² gram.
<h3>
What is Combustion?</h3>
Burning of coal in the presence of air is called combustion.
As according to the given question,
A coal-burning power plant generates 8.53 × 10¹⁶ Joule of energy in a year.
1 gram of coal yields generates 36 kilo joule (36000 Joule) energy.
Hence, to generate 8.53 × 10¹⁶ Joule of energy in a year, the weight of carbon burnt will be ;
= 1/36000 x 8.53 × 10¹⁶
= 2.3 x 10¹² gram
Learn more abut combustion here ;
brainly.com/question/15117038
#SPJ1
Answer: three
Explanation: Al has only three elections available for bonding