hi my name is yash please give me the ans of question no 7
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Using eqn, mvr is equal to nh/2*pi.
Substituting given values,(take n is equal to 1 because of the first bohr hydrogen atom) we get 6.62*10 power -34/6.28(2*pi)*9.1*10 power -31*0.529*10 power-10.then we get 0.045*10power7 that is equal to 4*10 power9
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