The literal expression of red phosphorus sulfate and iron wire burning in oxygen

The literal expression of red phosphorus sulfate and iron wire burning in oxygen

The chemical equation of sulfur dioxide ignited by sulfur and oxygen: sulfur dioxide ignited by S + O2
Iron + oxygen ignites Fe3O4 3Fe + 2O2 ignites Fe3O4
Red phosphorus + oxygen ignites phosphorus pentoxide

Literal expression of sulfur, red phosphorus and iron wire burning in oxygen

Ignite
Sulfur + oxygen - → sulfur dioxide
light
Red phosphorus + oxygen - → phosphorus pentoxide
light
Iron + oxygen - → Fe3O4

Write the following equation and describe the reaction type: 1) electrolytic water; 2) combustion of fine wire in oxygen; 3) thermal decomposition of mercuric oxide; 4) potassium permanganate for laboratory use
Oxygen production

1.2h2o = electrified = 2h2 ↑ + O2 ↑ decomposition reaction
3Fe + 2O2 = ignition = Fe3O4 reaction
3.2hgo = △ = 2hg + O2 ↑ decomposition reaction
2 KMnO4 = = △ = k2mno4 + MnO2 + O2 ↑ decomposition reaction

The conversion formula of DM & sup3; and CM & sup3; and its specific meaning

1 cubic decimeter = 1000 cubic centimeter is the volume unit. 1 cubic decimeter means the volume of cube with length, width and height of 1 decimeter, that is, 1dm * 1dm * 1dm = 1dm ^ 31. Cubic centimeter means the volume of cube with length, width and height of 1 centimeter, that is, 1cm * 1cm * 1cm = 1cm ^ 3 and 1dm = 10cm (1dm = 10cm), then 1dm * 1dm * 1dm = 1

What is the volume formula for calculating the density of celestial bodies
ρ = m / V is the inner V for calculating the density of celestial bodies

ρ = m / V is v = 4 π R ^ 3 / 3 for calculating the density of celestial bodies