calculate how many g NaCl and how many g H2O are needed to prepare 250g of NaCl sodium chloride solutionwith mass ratio 0.9%

an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).

3

explanation:

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.