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Question:Plz answer me these questions, im really stuck!!!
1. Name a red colored metal, a non reactive metal and a very shiny metal.
2. What happens when u tap a metal, and hammer a non-metal.
3. what is ore and an alloy.
4. which 4 substances are put in blast furnace.
5. which 3 substances come out of blast furnace.
6. what are the different types of iron and steel.
7. which 2 gases make up most of the atmosphere.
8. what are the 3 allotropes of carbon.
9. what are the adventages of Frasch process over sulphur mining.
10. what is the main difference between metal oxide and non-metal oxide. If u know only 1 question plz answer it!!!
Answers:1a.No metal is red in color.
3a.A type of rock that contains minerals with important elements including metals
3b.A combination of different metals or carbon in metallic bonding
4.Hematite/iron(III) oxide(Fe2O3), coke (carbon), limestone/calcium carbonate/CaCO3, air
5.Iron(Fe), carbon dioxide (CO2), calcium oxide (CaO)
6.Steel, iron, stainless steel, wrought iron, pig iron, cast iron
8.Diamond, graphite, buckyball/buckminsterfullerene
Question:You are testing a pure substance that is a yellow solid. While heating the solid, a colourless gas is given off. A dull red liquid remains. Was this solid an element or a compound? Explain your answer. Please help and thanks in advance.
Answers:It's possible it was an element - sulphur can start as yellow but has a dull red liquid allotrope. The gas driven off might be sulphur vapour - the information is a bit thin. Sulphur boils at over 400 C - so it's not likely.
I suspect the question is expecting the answer no because the substance appears to separate into two, both with different properties to the original - something an element wouldn't usually do.
Allotrope of sulphur :When sulphur powder is heated a remarkable reaction occurs. The S8 ring breaks open and polymerises into long sulphur chains. This is a metastable rubber like substance which, given time, reverts back into the ring structure.
Copy of Structure And Allotropes Of Sulphur :Check us out at www.tutorvista.com There are a large number of allotropes of sulfur. In this respect, sulfur is second only to carbon. The most common form found in nature is yellow orthorhombic -sulfur, which contains puckered rings of S8. Chemistry students may have seen "plastic sulfur"; this is not an allotrope but a mixture of long chain polymeric sulfur forms, two of which have been identified as allotropes. In addition to these there are other solid forms that contain sulfur rings of 6, 7, 915, 18 and 20 atoms. There are also gases, S2, S3; some species only detected in the vapour phase, S4 and S5 and perhaps five or more high-pressure forms, two of which are metallic. The range of molecular allotropes possessed by sulfur can in part be ascribed to the wide range of bond lengths (180260 pm) and bond angles (90120 ) exhibited by the SS bond and its strength (the unrestrained SS single bond has a high bond energy of 265 kJ mol 1). Early workers identified some forms that have later proved to be allotropes, ie pure forms, whilst others have proved to be mixtures. Some forms have been named for their appearance, eg "mother of pearl sulfur", or alternatively named for a chemist who was pre-eminent in identifying them, eg "Muthmann's sulfur I" or "Engel's sulfur". A commonly used naming system uses Greek suffixes ( , , etc.); however, this system predates the discovery of the new forms that have been synthesised rather than prepared from ...