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A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?
A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl.  Assume adding salt doesn’t change its volume and find the ratio of x and y. 
If pH of solution of NaOH is 12.0 the pH of H2SO4 solution of same molarity will be ____________
1000 mL 1 N H2SO4   এর দ্রবণ তৈরি করতে 98% H2SO4   এর কত মিলিলিটারের প্রয়োজন হবে? [H2SO4   এর ঘণত্ব = 1.8 g /cc]
What is the molarity of the mixture of two solution, first solution 4 M and 10 liter and second solution 2 M and 40 liter?
A student has two solution of a substance. Solution-1: 25M, 400mL and Solution-2: 30M, 300M. What is the molarity of the final solutions if these two solutions are mixed?
A solution is prepared by dissolving 30.0 grams of Ni(NO3)2 in enough water to make 250 mL of solution. What is the molarity of this solution?
What is the molarity of 20% (w/v) H2SO4 solution?
What is the molarity of 5.30 g of Na2CO3 dissolved in 400.0 mL solution?
0.98 g H2SO4 ব্যবহার করে 1.0 L জলীয় দ্রবণ তৈরি করা হোল। দ্রবণটির ঘনমাত্রা কত? (1.0 L aqueous solution is prepared using 0.98 g of H2SO4 What is the concentration of the solution?)