Burgundy Mixture is a formulation used to kill fungi on grapevines. It is made by mixing two compounds, A and B.
The ratio by mass of A : B in the mixture is 1 : 8
(a) Calculate the mass of A needed in a mixture containing 125 g of B.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.