3. Calculate the number of particles for each of the following: a) 8.81 mol HCI
b) 2,76 mol NaOH
c) 1.5 mol Al, S,

The grooves or folds of the brain are called

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.

State one important difference between a physical change and a chemical change?