What is the effect of increasing the pressure on the following equilibria? i. N204 ⇄ 2 NO2
ii. 4NH3 + 3O2 ⇄ 2N2 + 6H2O
iii. N2 + O2 ⇄ 2NO
iv. 2HF ⇄ F2 + H2
v. 2NOCl ⇄ 2NO + Cl2
vi. H2 + I2⇄ 2HI

the answer is minerals.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.