đốt cháy hoàn toàn m(gam) photpho trong không khí thu được hợp chất điphotpho pentao oxit*(P2O5).Tính khối lượng của Photpho cần dùng dể phản ứng đủ với 3,36lít khí O2(dktc)

Why are the trends and exceptions to the trends in ionization energy observed?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

One does not belong why? ice, gold ,wood ,diamond and table salt