The heat of fusion of palmitic acid (a saturated fatty acid found in meats, etc.) is 39.18 cal/gram at its melting point. the chemical formula for palmitic acid is c16h3202. its molecular weight is 256. how many calories of heat energy are needed to convert 0.5 mole of palmitic acid from a solid to a liquid at its melting point?

Which statement about the stamps is correct?

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.