For the reaction: 2H20(1) - 137 kcal - 2H2(g) + O2(3), how many kcal are needed to form 2.00 moles O2(g)?
A) 685 kcal
B) 190. kcal C) 137 kcal
D) 548 kcal
E) 274 kcal

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.

2b2t

explanation:

2b2t

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.