Chemistry

Problem

{}_{84}\text{Po}^{210}

decays with

\alpha

-particle to

{}_{82}\text{Pb}^{206}

with a half-life of 138.4 day. If 1.0g of

{}_{84}\text{Po}^{210}

is placed in a sealed tube, a. how much helium will accumulate in 69.2 day? Express the answer in

\text{cm}^3

at STP. b. Also report the volume of He formed if 1 g of

\text{Po}^{210}\text{O}_2

is used.