A first order reaction has specific reaction rate 10-2s-1. How much time it will take for 20g of reactant to reduce to 5g? (a) 138.6 s (b) 346.5 s (c) 693.0 s (d) 238.6 s

A first order reaction has specific reaction rate 10-2s-1. How much ti

1.	A first order reaction has specific reaction rate 10-2s-1. How much time it will take for 20g of reactant to reduce to 5g? (a) 138.6 s (b) 346.5 s (c) 693.0 s (d) 238.6 s
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