Hy2u - ag +
s8 + → __ s03
_c02 + __h2o → ch12o6 + __02
k+ — mgbr → _kbr + mg
_ hel + _caco3 → __cacl2 + _h20+2 002
ihno3 + 1 nahco3 + | nano3 + __ h2o + __co2
h2o +_102→ _h2o2
nabr +_ caf2 → _ naf + - cabra
- h2so4 + _nano3 → — hno2 + na2so4
21)
_ ag2o _ag+ _o2

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o