|
|
| *SoulEyes Photography>>>Advertising Photographer |
Can anyone help me clarify my answers??? And please be honest to correct me if i'm wrong...Thanks! =D? |
1. Which gas would you expect to be used for the following purposes? (a) photographers' flash bulbs (b) freezing the contents of a pipeline so that repairs can be made (c) flushing out furnaces before flammable gases are introduced (d) producing iron from iron ore (e) ballooning over Central Australia (f) filling potato chip bags (g) an advertising light in a shop window (h) a foam fire extinguisher (i) filling red indicator lamps for instrument panels 2. Air is a mixture of several different gases. Identify the gas in air which: (a) turns limewater milky (b) is a noble gas which is lighter than neon (c) supports combustion (d) makes up almost 80% of air (e) condenses to form a colourless, odourless liquid at room temperature And here are my answers: 1. (a) xenon (b) nitrogen (c) carbon dioxide (d) carbon (e) helium (f) nitrogen (g) neon (h) carbon dioxide (i) neon 2. (a) carbon dioxide (b) helium (c) oxygen (d) nitrogen (e) water vapour umm..number 2 letter e.. =================== my point of view is this.. a normal room temperature is about 70 degrees Fahrenheit. while, water vapour will only condense onto another surface when that surface is cooler than the temperature of the water vapor.. so if you say water vapor always condensing at room temperature, then you would have urself made an improvised rain in your house.. i don't think also at room temperature, cause in our house, when we boil water, vapor only attaches only at the surface of the kettle, while there aren't wet linings of our walls here. Um, just wanna clarify that and that's my suggestion...maybe if there are other reasons, I would wholeheartedly accept my mistake. =) ------------------------------... I'm kinda pressured here, for most people answered water vapor. also take note of this: -Liquid air is air that has been liquified by compression and cooled to very low temperature -Helium exists in liquid form only at very low temperatures. -Water vapor will only condense unto another surface when that surface is cooler than the temperature of the water vapor, or when the water vapor equilibrium in air has been exceeded (we need a surface here that should be cooler so if in a simple room, only at the nearest surface where the water evaporated must have the wettings..;)) - Okay I'll give you an example situation (water vapor condenses if there's just an open space) A hot cup of chocolate, and an open space. here it goes! The molecules of the water vapor will most probably leave the hot cup, and go to a cooler part, just above the cup, then you could notice a sort smoke right? so, the water vapor condenses but ain't produces liquid, unless you would want it to precipitate (rain..)... and another situation. Heating kettle..and a surface.. --would you notice that if when you place it near a surface while heating you would notice that after several minutes you could see that the surfaces contains the wettings..(lol).some droplets right?..for that surface is much cooler than the water vapor..=) (normal room temperature ain't that low right? about '70-85 degrees fahrenheit' or '21-29.4 degrees celsius') ------------------------------... Source(s): swear other answers are right.. Sorry, for being late about 11 hours, because accidentally, I slept from 10:30 p.m. (last night) till 8 a.m.(our time now so, 'GOOD MORNING!!!' ;))... are u still awake? (hope u are) |
| Tags |
| Fashion Photographer Famous Photographers Family Photographer Child Photographer Bridal Photographer Advertising Photographer |
Photography Categories--Copyright/IP Policy--Contact Webmaster |