Question 5 4 pts 5) What is the wavelength of light emitted when the electron in a hydrogen atom undergoes a transition from level n = 8 to level n = 2 (emission)? |DeltaE] = RH [1/n12 - 1/n221, where c = 3.00 x 108 m/s, h = 6.63 x 10-34 Jos, RH = 2.179 x 10-18J). Delta E = hc/Lamda, 0 537 nm O 197 nm O 389 nm 393 nm 423 nm

imma come back to you hold on

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"