Meseret

The molarity of an aqueous solution of potassium hydroxide, KOH, is determined by titration against a 0.197 M HI solution. If 28.4 mL of the base are required to neutralize 18.6 mL of HI, what is the molarity of the KOH solution?

Balloon rising 4m/s, wind blow horizontal at speed of 4.5m/s find the velocity of balloon relative to the ground?

Vector P is 6m in the x-direction .vector Q is 10m in the y-direction . A,use the parallelogram method to work out p+q. B,use Pythagoras theorem and trigonometry to work out p-q.