Make note of it and learn from her mistakes :)
Professor of Physics Carlo Rubbia
Avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units.
these units could be atoms, molecules or formula units.
therefore 1 mol of Calcium iodide is made of 6.022 x 10²³ formula units
so if 6.022 x 10²³ formula units make up 1 mol
then 1.20 x 10²⁵ formula units - make
= 19.9 mol
there are 19.9 mol of CaI₂ present
Answer:
its sunspots :)
Explanation:
can i pleasee have the brainiest tyty
for my rank
Answer:
and 
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
For the given chemical equation:

Here,
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms
which is a conjugate base.
And,
is gaining a proton, thus it is considered as a base and after gaining a proton, it forms
which is a conjugate acid.
Hence, the correct answer is D.