Aballoon is filled with air at room temperature. it is then dipped into liquid nitrogen at 77k. why does the balloon collapse? a) the molecules inside the balloon slow down < maybe this one? b) the material becomes sticky < i doubt it's this answer c) all the air inside the balloon condenses to form ice d) it develops a hole due to the decreased temperature

Afamily is one another name for a group on the table of elements.

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

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?