Classify the following reactions as synthesis, decomposition, single replacement or double replacement. Type your answer in the box to the right of each equation.

5) Mg + 2HCl → H2 + MgCl2
6) 2H2O2 + 2H2O + O2
7) HCl + AgNO2 → AgCl + HNO2
8) 2Na + Cl2 + 2NaCl

Compare and contrast physical changes with chemical changes.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Which description best characterizes the motion of particles in a solid?