You place a sample of plutonium, initially at 74 .C into a container filled with 0.5 kg of water at 29 .C. The resulting mixture reaches a final temperature of 43 .C. What was the mass of the plutonium sample? (Include units in your answer. Round your answer to four significant digits!) Substance Melting Point Boiling Point Specific Latent Heat of Fusion Specific Latent Heat of Vaporization (C) (.C) Specific Heat Capacity (KJ/kg) (kJ/kg) aluminum 360 (kJ/kg.C) 2519 397 10900 0.897 ammonia -77.74 33.34 332.17 1369 4.7 argon -189 -186 29.5 161 bismuth 0.5203 271 1564 54 723 0.123 bromine -7 59 132 375 0.473 carbon -78 dioxide -57 184 574 0.839 chlorine -102 -34 181 576 0.48 copper 1084 2562 209 4730 0.385 ethyl alcohol -114 78.3 108 355 2.44 gold 1064 2856 63.7 1645 0.129 hydrogen -259 -253 59.5 445 14.267 iron 1538 2861 247 6090 0.412 krypton -157 -153 16.3 108 0.248 lead 327 1749 23 866 0.129 lithium 181 1342 432 21200 3.58 mercury -39 357 11.4 295 0.1395 neon -249 -246 16.8 84.8 1.0301 nickel 1455 2913 298 6430 0.44 nitrogen -210 -196 25.3 199 1.04 oxygen -219 -183 13.7 213 0.918 plutonium 640 3228 11.6 1370 0.13 silicon 1414 3265 1790 12800 0.71 silver 962 2162 105 2390 0.233