Which statement is true about sodium chloride (NaCl)? A) It is a salt because it decreases the concentration of metallic ions.
B) It is an acid because it is formed by the reaction of a salt and an acid.
C) It is a salt because it is formed by the reaction of an acid and a base.
D) It is an acid because it increases the concentration of nonmetallic ions.

C

Explanation:

ChEmIsTrY

if you mean hydrogen and oxygen then water is the product

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml