Question

A water sample is nigh fe2so4.h2o as a cogualnt at the rare of 278 ppm gave analysis calculate the lime & soda require for soften 250000l of water

Answer 1

$\rm\huge\underline{Answer}$

the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.