How many moles are in 7.777x 1024 molecules of Mg2. Watch your significant figures 12.91 moles Mg2

12.9 moles Mg2

12 atoms Mg2

12.9 atoms Mg2

i believe the answer is 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.