Question

guys urgent please help me...and iam new to this app please tell how to use this app in pm
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Answer 1

Explanation:

λ1=R[n121−n221]

λ1=109677.6 cm−1×[221−521]

λ1=23032.3 cm−1

λ=4.34×10−5 cm

Convert unit from cm to nm

1 cm =107 nm

λ=4.34×10−5 cm×1 cm107 nm

λ=434 nm