Element z reacts with bromine to form an ionic compound zbr2
a) state with reasons i) the physical properties of zbr2 at room temperature ii) whether z is a metal or non metal.
b)what is the formula of the oxide formed when z reacts with oxygen?

Lewis structure and molecular geometry for nh2cl

In 2002, the rare earth elements mine in mountain pass, california was closed because

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.