When a solid is dissolved in water. The outside of the beaker becomes cold to touch. What does this tell you about the process?
a. The enthalpy of the process is negative.
b. The dissolution process is exothermic.
c. The dissolution process is endothermic.
d. both a & b

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

Label a-f based on the table using c for concentrated and d for dilute