Cho m gam hỗn hợp Cu và Fe tác dụng vừa đủ với 1,456lít khí Cl2 (đktc), thu được 7,575g hỗn hợp muối a) tính m gam

b) tính thành phần phần trăm theo khối lượng mỗi kim loại trong hỗn hợp

c) cho hỗn hợp trên tác dụng với dd HCl 0,5M (D= 1,22 g/ml). Tính khối lượng dd HCl cần dùng cho phản ứng

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom