Uranium is isolated from its ore by dissolving it as `UO_(2)(NO_(3))_(2)` and separating it as solid `UO_(2)(C_(2)O_(4)).xH_(2)O " "A 1.0 g` sample of ore on treatment with nitric acid yielded `1.48 g UO_(2)(NO_(3))_(2)` which on further treatment with `0.4 g Na_(2)C_(2)O_(4)` yielded `1.23 g " "UO_(2)" "(C_(2)O_(4)).xH_(2)O`. Determine weight percentage of uranium in the original sample and `x` :