06. A and B react in ratio of 3:5 by mass. Mass of A required to react completely with 30g of B

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06. A and B react in ratio of 3:5 by mass. Mass of A required to react completely with 30g of B is ___

Answer: 18g

Step-by-step explanation: let the masses of a,b be 3x and 5x respectively

given 5x = 30

x = 6

mass of a = 6*3 = 18