Why can't all mixtures be classified as solutions?
a. not all mixtures are homogeneous.
b. not all mixtures have solutes and solvents.
c. mixtures are made of only one substance.
d. not all mixtures are heterogeneous.

D. Not all mixtures are heterogeneous

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)