Question

Which element is present in all three of these substances?
a) Iron
b) Oxygen
c) Sulphur
d) Hydrogen​

Answer 1

Ans:- Oxygen

Explanation:

aannssswweerr

Answer 2

Answer:

Compound Chemical Formula Elements present

Quick lime CaO Calcium, Oxygen

Hydrogen bromide HBr Hydrogen, Bromine

Baking powder NaHCO

3

Sodium, Hydrogen, Carbon, Oxygen

Potassium sulphate K

2

SO

Potassium, Sulphur, Oxygen