Hòa tan 19,35 gam hỗn hợp Zn và Mg bằng b (ml) dung dịch HCl nồng độ 2,5M thu được 12,32 lít khí H2 (đktc) 1, Viết PTHH của các phản ứng xảy ra
2, Tính phần trăm khối lượng mỗi kim loại trong hỗn hợp đầu
3, Xác định giá trị của b

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

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.