Question

A solution of 1.00 M NaCl is available. How many milliliter are needed to make 100.0 mL of 0.750 M

Answer 1

 The  number of Ml  that are needed to make  100.0 ml of 0.750 m .if 1.00M   NaCl is available  is calculated as below
M1V1=M2V2

M1=1.00 m
V1=?
M2=0.75m
V2 = 100.0 ml

V1 is therefore = M2V2/M1

=(0.75m  x 100.0 ml)/ 1.00m = 75 ml  of  NaCl  is needed