liquid oxygen is blue
Sulfur burns with a blue flame when it reacts with oxygen.
Oxygen when liquefied looks like water with a bit blue color (baby blue).
Oxygen itself does not have a color because it is a transparent gas. In its liquid and solid forms, oxygen can appear pale blue due to its light absorption properties.
Oxygen gas has no color. Liquid oxygen has a very slight blue color.
Veins are blue because the blood is poor in oxygen, arteries are red because the blood is rich in oxygen.
Blue. Your blood is always blue until it is exposed to oxygen, when it reacts and turns red. Since veins aren't exposed to air/oxygen, they remain blue :)
Liquid oxygen is pale blue, while solid oxygen is colorless.
No. Blood is bright red when it contains oxygen and dark red when there isn't a lot of oxygen. The blue you see in veins is the vein itself.
When oxygen is cooled, it condenses from a gas to a pale blue liquid. At extremely low temperatures, around -183 degrees Celsius, oxygen solidifies into a blue, crystalline solid.
Liquid oxygen is pale blue in color, due to its unique molecular structure that absorbs certain wavelengths of light and reflects others.
Same thing that "happens" now. Oxygen does have a color. It's a very, very pale blue (this is NOT why the sky is blue, though).