g My made-up element doodium (Do) has three isotopes: Do-40, Do-41, and Do-42 with relative abundances of 15%, 47%, and 38%, respectively. Estimate the molar mass ( in g/mol to three significant figures) of doodium.

i'm assuming that the correct answer is indeed the first one/ "a"..

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.