## Chemistry and Chemical Reactivity (9th Edition)

λ = $\frac{h}{mv}$ h = $6.626\times10^{-34}Js$ m = $9.11\times10^{-31}kg$ v = $2.5\times10^{8} cm/s$ = $2.5\times10^{6}ms^{-1}$ λ = $\frac{6.626\times10^{-34}Js}{9.11\times10^{-31}kg\times2.5\times10^{6}ms^{-1}}$ = $2.9\times10^{-10}$ = 0.29 nm