Balance the following chemical equat LCM method)
o
H,+Cu, 0-> Cu +H2O
b KCIO, KCI+
C Fe+O, Fe₂O
Mg + HCl → MgCl2 + H,
State the law of conservation of mass
3
d​

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.