Which one is the right answer? A) I'm the right answer
B) I'm to wrong answer
C) I'm super right, and I don't lie
D) I'm super wrong, and I don't lie. But C) definitely lied.

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

How much energy is made when a pice of wood burns. how do you know

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.