Trong phân tử nào chỉ có sự che phủ của hai orbital p

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?