How much heat is released by lowering the temperature of 825 grams of molten (liquid) lead at 800K to solid lead at 295K? Lead melts at 600.61K.

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.