If I (tell) before, i would have come to your wedding

Viết các PT điều chế trực tiếp

a) Cu--->CuCl2(3 cách)

1. I came home, it began to rain

<=>Barely..............................

1.He had clean been listening to our conversation and I (wonder) how much he (hear). When I (ask) him what he (do), he (say) that he (drop) a 50 piece outside the door and (look) for it.

Nếu cho 100g dd muối Na2SO3 12,6% PƯ hoàn toàn vs dd axit H2SO4 rồi dẫn toàn bộ lượng khí SO2 sinh ra vào 100ml dd Ca(OH)2 1,5M. Tính khối lượng muối tạo thành?