Which of the following reactions are considered single replacement reactions? (2 points) pls help me [Select ALL that apply]

2 Mg + O2 → 2MgO

CaO + H2O → Ca(OH)2

Fe + CuCl2 → FeCl2 + Cu

Au2S3 + 3 H2 → 2 Au + 3 H2S

NaNO3 + KC2H3O2 → NaC2H3O2 + KNO3

2 MgNH4PO4 → Mg2P2O7 + 2 NH3 + H2O

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.