Susan needed to make a 9.72M solution. She was given 29.5 grams of sodium hydroxide NaOH. What volume would she need to use to make this solution? What is the molar mass or gfm of sodium hydroxide?

Solve for moles, take the grams of sodium hydroxide and divide by the gfm. So the moles of NaOH

Solve for Volume take moles and divide it by the molarity of the solution. So the volume of hydroxide is?

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

the ratio of the conjugate base to the acid required to attain the desired ph.

1 is the answer to this problem

a is the correct answer