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5% Na2CO3 দ্রবণ দ্বারা বোঝায়-1.5g Na2CO3 আছে 100 mL Na2CO3 দ্রবণেii. 5g Na2CO3 আছে 100 g Na2CO3 দ্রবণেiii. 5g Na2CO3 আছে 100 mL পানিতেনিচের কোনটি সঠিক ?
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. 
১ লিটার ডেসিমোলার Na2CO3 দ্রবণে কত গ্রাম Na2CO3 Na2CO3 খাকব?
  125 cm3 Na2CO3   এর একটি দ্রবণ   5.3 g Na2CO3 ধারণ করে। দ্রবণটির ঘনমাত্রা মোলারিটিতে কত হবে?    (Na2CO3 এর আনবিক ভর 106 .0)
The given table shows the total number of students studying courses P, Q, R, S and T in eight institutes A, B, C, D, E, F, G and H.  courses  Institute    A B C D E F G H P 520 410 550 450 570 210 750 450 Q 410 540 610 580 380 550 570 310 R 430 210 390 530 730 510 530 480 S 350 280 570 320 410 480 610 460 T 370 480 380 250 180 370 590 660 The number of students studying course Q in institute B is what percent of the number of students in institute C?
The table represents the total number of students studying courses P, Q, R, S and T across eight institutes, i.e. A, B, C, D, E, F, G and H. Courses Institutes    A B C D E F G H P 520 410 550 450 570 210 750 450 Q 410 540 610 580 380 550 570 310 R 430 210 390 530 730 510 530 480 S 350 280 570 320 410 480 610 460 T 370 480 380 250 180 370 590 660 What is the ratio of the total number of students studying in Institute A to the total number of students studying in Institute H?
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?