a model of the molecular structure of liquid water with hydrogen atoms (white) and oxygen atoms (red)Are all the molecules in the picture the same? Explain.

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature

Classify this reaction: 2al+n2-> aln.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?