A piece of copper is in some snow at -8.0°C. It is picked up by someone and warmed to body temperature of 37°C. If the mass of the copper is 3.1g, how much heat is absorbed? ​

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?