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