For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy δsrxn. if it's not possible to decide with the information given, check the "not enough information" button in the last column. note for advanced students: assume the temperature remains constant. assume all gases and solutions are ideal. reaction sign of reaction entropy not enough information. an0 nacl (s) → na+ (aq) + cl-(aq) not enough information. 4pci 3(g) → p4(g) + 6cl2(g) not enough information.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Draw metallic bonding if two copper

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action