You should check PBAU email how often?                                                                                        

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

Determine if the following statements are True or False based on the species shown below    Species Y and Z are isotopes of each other [1] Species A has 128 electrons present  [2] Species A and Z are the same element [3]  

Determine if the following are True or False.   The elemental symbol for mercury is Hg [1] The elemental symbol for arsenic is Ar [2] The elemental symbol for silver is Si [3]

How many photons would be needed to produce 437 mJ of energy, if the photons have a frequency of 1.10 x 1029 s-1?

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 decreases. [1] As the frequency of light decreases, the energy of light increases. [2] A light with a frequency of 5.45 x 1014 Hz has a longer wavelength than a light with a frequency of 8.20 x 1014 Hz. [3]

How many nanometers are in 256 cm?

What is the frequency of a light with a wavelength of 550 nm?

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 

How many cubic millimeters of silver have a mass of 0.0020 kg if the density of silver is 10.54 g mL-1? (1cm3 = 1mL)