(Multiple Choice, 30 pts)

Which reaction is a single replacement reaction?
A. 2H2 + O2 → 2H2O
B. 2H2O2 → 2H2O + O2
C. KOH + HCl → KCl + H2O
D. Cu + 2AgNO3 → 2Ag + Cu(NO3)2

1.from liquid state to gaseous state is evaporation 3.solid to liquid is melting 5. solid to gaseous state is sublimation 6. gas to solid state is decomposition 7. a change of state is known as the states of matters

Variables,control,conclusion and finally scientific theory

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

Seems cool i guess ttyl