The half-life of I-124 is 4.2 days. How long will it take for the mass of I-124 to drop from 10.0 mg to 3.50 mg? a) 6.4 days
b) 0.25 days
c) 11 days
d) 2.8 days

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

An observation that requires measurement is called quantitative observable or qualitative

What methods could you use to solubilize calcium carbonate