What is an acid? a. a substance that increases the concentration of h+ ions when dissolved b. a substance that increases the concentration of oh– ions in solution c. a substance that increases the concentration of oxygen in solution d. a substance that produces hydrogen gas when dissolved

A. A substance that increases the concentration of H+ when dissolved.

Explanation:

(APEX)

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.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.