Answer:
2. +7
Step-by-step explanation:
The oxidation state of Cl in `HClO_(4)` is +7.Apr 17, 2022
3ans. CrS+2No3 --) 2No+So4+cr^3+
Cr=1 Cr=1
S=1 S=1
N=1=2 N=1=2
O=3=6 o=5=6
now that is how it look and it is not balanced in oxygen so add 2 in the front of No3.
it will look something like this 2NO3. even if u add 2 in the fornt it is not balance so add again 2 in the No in second and it will look like this 2NO.
so now it is blance.