Bài 1. Hoàn thành phương trình ion sau và viết phương trình phân tử của các phản ứng có phương trình ion rút gọn sau: a. HS- → H2S b. Pb2+ → PbS c. H+ → H2O.
d. HCO3- → CO32-. e. 2H+ → Cu2+. f. Al(OH)3 → AlO2-.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

How many lone pairs of electrons are on the central atom of no3- and what is the molecular shape? one, trigonal planar zero, trigonal pyramidal zero, trigonal planar one, tetrahedral one, trigonal pyramidal