Which factor is included in the ideal gas law that isn't present in the others?

Number of moles

Explanation:

From the general formula of ideal gas equation it is seen that number of moles is present and absent in other gas equations

your answer would be a. 12.5 kg

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.