Rubber is manufactured from latex that is produced from rubber trees. which statement about rubber is true?
it is made from the polymerization of a long chain of aromatic molecules.
it is made from the polymerization of a short chain of chloroprene molecules.
it is made from the polymerization of a long chain of alkene molecules.
it is made from the polymerization of a short chain of styrene molecules.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

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 the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false