Boron is represented by just "B"
So, option C is your answer.
Hope this helps!
A) because one was in the dark and one was not.
Answer:
<em>Making observation</em>
Explanation:
Answer: d. Cyolite
Explanation:
a.bauxite - Aluminum ore ✅
b.haematite - Iron ore ✅
c.calamine - an ore of zinc ✅
d.cyolite - ❌ the ore is cryolite
✅ - is an ore
❌ - not an ore
The ions formed are NH4(+) and S(2-)
The dissolution reaction of (NH4) 2S in water is as follows:
(NH4) 2S ==> 2 NH4 (+) + S (2-).
Ammonium sulfide is the ammonium salt of hydrogen sulfide. It has the formula (NH4) 2S and belongs to the sulfide family.
It is a relatively unstable compound (crystals decomposing at -18 ° C, but exists and is more stable in aqueous solution.) With a pKa exceeding 15, the hydrosulfide ion cannot be significantly deprotonated by ammonia. Thus, such solutions consist mainly of a mixture of ammonia and hydrosulphide of ammonium, it has a smell, close to that of hydrogen sulfide, and its aqueous solutions can be precisely by emitting H2S.