How is an exothermic reaction indicated in an equation? A. Heat is written above the arrow in the equation. B. Heat is included as one of the reactants. C. Heat is included as one of the products. D. Heat is added to both sides of the equation.​

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.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.