Select all the apply to the indicator phenolphthalein
-is pink in acid solution
- it provides a visual signal that a solution has changed from acid to a base
- is pink in base solution
-is colorless in acid solution
-is colorless in base solution

What? i don’t understand

Sorry i dont understand the question can you rephase it?

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.

Answer trigonal pyramidal;