Would the following errors increase, decrease, or have no effect on the calculated moles of gas collected in the experiment? explain your answers in complete sentences.

a) the measured mass of the magnesium was smaller than the true mass.
b) the actual temperature of the hydrogen gas is less than room temperature.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat