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Why an iron nail when heated in a Bunsen burner will only glow red whereas steel wool will burn away?
Since they are different substances, they will react differently in a combustion (burning) reaction.
Has hairspray changed ever since it was invented?
Hairspray has pretty much stayed the same since it was invented in the 1940s except chlorofluorocarbon compounds are no longer used since they discovered it can destroy the ozone. Hairspray is toxic and flammable.
What is a tirrill?
In the context of chemistry, this is likely to refer to a type of burner. The difference between a Bunsen burner and a Tirrill burner has to do with how the air flow is regulated ... a Bunsen burner usually has slits at the base of the barrel to admit air, while in a Tirrill burner the airflow is controlled by means of a needle valve. Burners in a real chemistry lab are actually more likely to be of the Tirrill type than the Bunsen type, since the needle valve allows better regulation of the air-gas mixture and therefore a steadier more reliable flame. There are some other modifications as well (the most common one being the Meker, which is the one with the "big head" that has a grid inside it, which spreads the heat more evenly). I've also seen a kind with horizontal slits where incoming air is regulated by screwing the entire barrel up and down (this is less common, as the barrel may become uncomfortably warm to touch, though it usually takes some time for this to happen and the adjustment of the air/gas mix usually happens immediately after the burner is ignited). I don't know if that type has an official name, or if so what it is.
What happens when you burn Iron?
The reaction will depend on the operating temperature. at very high temperature iron will form ferric oxide which is a main component in sulfuric acid production. if the temperature is not enough the reaction will not occur since, the enthalphy and entropy will produce a positive value
Is stitching fabric in garments a chemical or physical change?
It is a physical change since the chemical nature of the fabric has not changed.
Which flame should one use if he is leaving a Bunsen burner unattended?
Luminous since it is visible
What happens when the air hole is wide open in a Bunsen burner?
Flame is stronger since there is no way for the gas to escape but through the top.
What colour flame in the Bunsen burner is the noisiest?
Blue - since it draws air up the tube of the burner from the hole at the base. The noise is the sound of air being pulled into the tube by the heat of the flame above.
Where is the coldest part of the Bunsen burner?
The coldest part of the Bunsen Burner would be the gas inlet nozzle. Since expanding gasses absorb quite a bit of heat, the coldest portion would be where the gas first enters the burner. Now "whats the coldest part of a Buseb burners flame?", a completely different question. It' s the part closest to the ignition point.
How have bifocals changed since they were first invented?
The bifocals have changed alot since they were first invented. They have changed into different sizes, shapes and forms. They had also changed into sunglasses.:)
How has it changed since it was first invented?
no they have not
How has gymnastics changed since it was first invented?
Nothing's changed
How has the HD television changed since it was invented?
I have
How has a DVD changed since it was invented?
blue ray
Why an iron nail when heated in a Bunsen burner will only glow red whereas steel wool will burn away?
Since they are different substances, they will react differently in a combustion (burning) reaction.
How has softball changed since it has been invented?
well i have no idea
How have cars changed since the first car was invented?
bonjour
