Please help!

and could you please explain in simple terms how you reached your answer? ​

the answer is 75.0%.

you need to have a picture of the atom that way we can answer it

answersilicon (si); oxygen (o);

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.