Respuesta :
The mass of A needed in a mixture : 15.625 g
Further explanation
Given
A mixture of A and B
Ratio A : B = 1 : 8
mass b = 125 g
Required
The mass of A
Solution
Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a constant composition of elements
Mass of A (from the mass of B):
= 1/8 x 125 g
= 15.625 g
The mass of A needed for 125 g of B would be 15.64 g
The mass ratio of A to B in the mixture is 1:8
If B is 125 g, then the mass of A would be:
125 x 1/8
= 15.64 g
Thus, the mass of A needed for 125 g of B is 15.64 g.
More on mass ratio can be found here: https://brainly.com/question/14577772?referrer=searchResults