Answer:
26.68%
Step-by-step explanation:
100 mL vial of 25% solution :
In gram:
(100 *100) / 100 = 100g
25% * 100 = 0.25 * 100 = 25g
(25 * 250)g / 100
6250g / 100
= 62.50g
Total :
62.50g + 6g added
= 68.50g
Adding 6g to 5the 250mL solution
To gram:
(250 * 100) / 100 = 250g
[68.50 / (250+6)] * 100%
(68.50 / 256) * 100%
0.267578125 * 100%
26.675%
= 26.68%