Question

9. In a chemical reaction 45 g of a reactant AB decompose into 25g of product A and unknown
amount of product B. What is the mass of product B according to law of conservation of mass?
AB-----> A+B *
Options are:
20g
70g
25g
5g

Answer 1

Answer:

20g

According to law of conservation of mass

B=45g-25g

therefore,B=20g