Answer Happy

15. Which of the following best illustrates the law of conservation of mass? a. The chemical formula CH4 + 202 → CO2 + 2H20 maintaining the same number of atoms of each element from reactants to products. b. A pencil being held aloft holding potential energy; it then loses potential energy and gains kinetic energy as it is dropped and heads to the ground. C. Gas being lit and continuing to burn so long as more gas is getting added to keep the reaction going and releasing energy. d. A hot dog being kept in the freezer to keep it cool and prevent it from gaining much kinetic energy F. Which of the following statements is correct? a. NaCl is a weak electrolyte because it completely breaks apart when placed in water b. HgCl2 is a nonelectrolyte because it only partially breaks apart when placed in water C. NH4OH is a weak electrolyte because it only partially breaks apart when placed in water d. glucose is a strong electrolyte because it doesn't break apart when placed in water а