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Biology; Chemistry; Physics: Post your doubts here!

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how do we know if an element is going to melt or sublime?
n what is the conversion of gas directly into solid form called?
 
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???? o_O
Well what do u mean by the bold words above !
Metal oxides act as bases while non metals act as acids and only amphoteric oxides act as both so it wud be better !
dude i am answering his question""should they be an oxide of metal" however u r yte on the point that metal oxides are basic and non metal are acidic oxides
 
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how do we know if an element is going to melt or sublime?
n what is the conversion of gas directly into solid form called?
Actually there are some substance like iodine, ammonium chloride etc which can sublime while all others can only melt.Therefore u need to know the chemical substance is a sublimate or not.
To the second question the process which converts gas into solid directly is called solidification!!

Hope this help!! ;)
 
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Actually there are some substance like iodine, ammonium chloride etc which can sublime while all others can only melt.Therefore u need to know the chemical substance is a sublimate or not.
To the second question the process which converts gas into solid directly is called solidification!!

Hope this help!! ;)
it sure did. thnkuuu
 
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so wherever carbonates react with acid they form salt, water and CO2?
is this reaction correct? HCl + CaCO3 > H2CO3 + H2O + CO2

btw, thanku
 
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for calcium corbonate and Hcl

this would be correct reaction i think :

CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)
 
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thankuu

n wht about the CO2 thng? its released in every reaction tht has carbonate reacting??
 
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heyy,umm are we supposed to memorize the reactivity series?

yea. if u have problem with it, u can use this sentence. please send cats, monkeys and zebras in large high cages. make sure give pedlocks :p
its the sequence of positive ions.potassium, sodium, calcium, Mg, Al, Zn, Fe, Pb, H, Cu, Hg, Ag, Au, Pd/Pt
n for negative ions, so no crown bears inky horrors.
its sulphate, nitrate, chloride, bromide, iodie, and hydroxide
 
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