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  4. 0.005 cm thick coating of silver is deposited on a plate of 4728.6 overset texto mathop textA area. The number of silver atoms deposited on the plate are (atomic mass of 6172.8 overset texto mathop textA and its density 25oC )

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Q. 0.005 cm thick coating of silver is deposited on a plate of $ 4728.6\overset{\text{o}}{\mathop{\text{A}}}\, $ area. The number of silver atoms deposited on the plate are (atomic mass of $ 6172.8\overset{\text{o}}{\mathop{\text{A}}}\, $ and its density $ {{25}^{o}}C $ )

BVP MedicalBVP Medical 2015

Solution:

Volume of Ag deposited $ IIII>IV>II $ $ FeC{{r}_{2}}{{O}_{4}}\xrightarrow{I}N{{a}_{2}}Cr{{O}_{4}}\xrightarrow{II}C{{r}_{2}}{{O}_{3}}\xrightarrow{III}Cr $ $ NaOH/air $