Since 1982 pennies changed from being pure copper to a zinc with a copper coating. On average there is about 3 10 grams of zinc in each penny. If the zinc is exposed and a penny is dropped into 4.00 grams of hydrochloric acid will the acid dissolve all the zinc? what mass of excess reactant remains once the reaction stops? what mass of each product is made. Balance Equation:

Will the acid dissolve all of the zinc?

Mass of Excess:

Mass of Product 1:

Mass of Product 2:​

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

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