2 and 3 i need help with. look at the attatched picture

2. +7

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.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.