HEL 7th GRADE SCIENCE PROBLEM ABOUT KINETIC ENERGY OF ATOMS TEMPERATURE Think about what you've learned about how particle motion is related to temperature.

Select all of the statements that are true.

1. The total kinetic energy of the particles in a substance determines the substancels temperature.

2. How hot or cold a substance is depends on how fast its particles are moving.

3. All the particles in a substance are moving at the same speed, and that speed determines the substancels temperature.

4. If the particles in two pure substances have the same average speed, the substances must have the same temperature.

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.