A photon has a wavelength of 41.2 nm. Calculate the energy of the photon.

Below are the line spectra for Elements A-D and an unknown sample. What is the unknown sample composed of?

 Which of the following experiments identifies a physical rather than a chemical property of a substance?

What is the answer of the following problem with correct number of significant figures?  =0.0083 x 4.2 

Determine if the following statements about the relationship between energy, wavelength, and frequency of light are True or False.  As the wavelength of light increases, the energy of the light increases. As the frequency of light increases, the energy of light increases. A light with a frequency of 2.45 x 1014 Hz has a longer wavelength than a light with a frequency of 8.20 x 1014 Hz.

Which of the following transitions is most likely to result from absorption of a photon with the lowest energy?

Using the conversion factors below, how many sim would 23.3 haha have?   2 bot  =  3 vid  9 vid  =  1 sim  4 bot  =  6 haha 

Which of the following statements is/are correct regarding tin and  selenium  An individual selenium atom weighs more than an individual tin atom. A mole of tin weighs more than a mole of selenium  A mole of tin contains more atoms than a mole of selenium   

A researcher looking for new elements found one that she plans to name cinnamonium (Ci).  The element information to be added to the periodic table is provided below, using this information how many atoms of Ci would 141.1 g contain?

How many significant figures would the solution to the following problem have?