A manufacture has 600 litres of a `12%` solution of acid .How many litres of a `30%` acid solution must be added to it so that acid content in the resulting mixture will be more than `15%` but less than `18%` ?

How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?

How many times must a man toss a fair coin so that the probability of having at least one head is more than 90%?

How many times must a man toss a fair coin so that the probability of getting at least one head is more than 90%?

How many times must a man toss a fair coin so that the probability of getting at least one head is more than 90%?

How many times must a fair coin be tossed so that the probability of getting at least one head is more than 80%?

A solution of 8% boric acid is to be diluted by adding a 2% boric acid solution to it. The resulting mixture is to be more than 4% but less than 6% boric acid. If we have 640 litres of the 8% solution, how many litres of the 2% solution will have to be added?

A solution is 25% water, 25% ethanol and 50% acetic acid by mass. Calculate the mole farction of each component.

Is CH_3COOH strong or weak acid? Will its 0.1 M solution have pH more or less than HCl of same concentration?

Find the molarity and molality of a 67% solution of HNO_(3) by weight . The density of the solution is 1.50 4 g/ cc and the molecular mass of nitric acid is 63