Answer:
The mass stays the same only volume changes, the volume decreases
Explanation:
The ice shrinks (decreases volume) and becomes more dense. The weight will not (and cannot) change.
Covalent example ch4 where carbon is covalently bonded with all 4 hydrogens
289.4 F is the right one man
Yup go this website for more information http://dwb.unl.edu/calculators/activities/BalEqn.html