Write the condense structural formula of the following compounds. 1. The alkene 2,7 Undecadiene with the molecular formula C11H20 (Note the number of double/triple bonds present)

2. 8 Nonene with the molecular formula C9H18

3. Write the condense structural formula of 5 Decyne with the molecular formula C10H18

Which statement about the stamps is correct?

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

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?