17 mg of a hydrocarbon (M.F. C_10 H_16 ) takes up 8.40 mL of the H_2 gas measured at 0^° C and 760 mm of Hg. Ozonolysis of the same hydrocarbon…

$\displaystyle 17$ mg of a hydrocarbon (M.F. $\displaystyle \mathrm{C}_{10} \mathrm{H}_{16}$ ) takes up $\displaystyle 8.40$ mL of the $\displaystyle \mathrm{H}_2$ gas measured at $\displaystyle 0^{\circ} \mathrm{C}$ and $\displaystyle 760$ mm of Hg . Ozonolysis of the same hydrocarbon yields The number of double bond/s present in the hydrocarbon is $\displaystyle \_\_\_\_$.