The half-lifIf you start with a 256–g sample of Hassium-265, then after 8 seconds grams of Hassium-265 will be left.

the answer is d   for sure : )

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

5.6⋅10−^19  j

do you need the explaination?