An idealized object that does not reflect or scatter any radiation that hits it, but simply absorbs every bit of radiation that falls on it is called:

An astronomer observes two ordinary stars. The first one turns out to be twice as hot as the second. This means that the first one radiates:

A star is 230 light years away. The light we see tonight from that star left it

A compound with a molecular formula C5H11NO has the 1H NMR spectrum given. The IR spectrum shows an absorption at around 3400 cm-1. Which of the structures given is consistent with this spectrum? The number by each peak is the proton count for that peak.

A compound with a molecular formula C9H12 has the 1H NMR spectrum below.  Which structures given is consistent with this spectrum?  

Which of the compounds shown has an odd m/z value for the molecular ion?

Which one of the given compounds is consistent with the IR spectrum shown?

1.1.3 A factor that is affected in an experiment that you want to measure.  A Fixed variable  B Dependent variable  C Independent variable  D Control experiment  (2)

Functions to open the eyes.  

Identify the reagents, in correct order, expected to accomplish the following transformation.