A coil of wire wrapped around an iron core will make the core
A. enerigized
B. neutralize
C. electrified
D. magnetic

yes the answer is total mass in unchanged   : )

im doing test rn im going with 2 but ill give answer if itss wrong,   : )

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.