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

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate,m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98