16) Which scientist and model/experiment unintentionally discovered the electron? A. Rutherford - Gold Foil Experiment/Nuclear
B. Thompson - Cathode Ray Tube/Plum Pudding
C. Bohr Model - Planetary Model
D. Schrodinger - Electron Cloud Model

B. Thompson - Cathode Ray Tube/Plum Pudding

Explanation:

The scientist and the model/experiment that unintentionally discovered the electron was the Thompson's - Cathode Ray Tube/Plum Pudding.

Experiments on the discharge tubes was performed by J.J Thomson in 1897 and this led to the discovery of the electron as a subatomic particle.

The properties of the cathode rays were studied and presented by Thomson in his work at that time.

"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"

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