# The rate constant for this first–order reaction is 0.0800 s−1 at 400∘C . A⟶products A⟶products After how many seconds will 20.3%of the reactant remain?

Question

The rate constant for this first–order reaction is 0.0800 s−1 at 400∘C .

Aproducts A⟶products

After how many seconds will 20.3%of the reactant remain?