C-06-Q196mediumsingle_mcqAt STP, 5 L CH4\mathrm{CH_4}CH4 contains H atoms approximately—a5.38×10235.38 \times 10^{23}5.38×1023b6.023×10236.023 \times 10^{23}6.023×1023c1.34×10241.34 \times 10^{24}1.34×1024d5.38×10225.38 \times 10^{22}5.38×1022