Elements, Compounds and Mixture

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  • #1
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Which 2 groups of substances below contain 1 element, 1 compound and 1 mixture? pick 2 groups.

A.) Gold, sodium chloride, steel
B.) oxygen, iodine, air
C.) methane, iron(III)chloride, sea-water
D.) Helium, carbon(IV) oxide, mixed dessert
E.) Bronze, stainless steel, nitrogen(IV)oxide

i pick B and D. can sombody correct me?
what is STEEL under? mixture? :confused:

thanks lotsa.:smile:
 

Answers and Replies

  • #2
Hootenanny
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topsyturvy said:
Which 2 groups of substances below contain 1 element, 1 compound and 1 mixture? pick 2 groups.

A.) Gold, sodium chloride, steel
B.) oxygen, iodine, air
C.) methane, iron(III)chloride, sea-water
D.) Helium, carbon(IV) oxide, mixed dessert
E.) Bronze, stainless steel, nitrogen(IV)oxide

i pick B and D. can sombody correct me?
what is STEEL under? mixture? :confused:

thanks lotsa.:smile:
You may want to think again, B has two elements and one mixture. D is correct.
 
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  • #3
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how about sodium chloride?

is sodium chloride a mixture?
bronze is also a compound right?

then my ans should be A and D. is that correct? :smile:
 
  • #4
Hootenanny
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topsyturvy said:
is sodium chloride a mixture?
:eek: :eek: :eek: Sodium chloride is an ionic.....
 
  • #5
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sodium chloride is an ionic compound.
stainless steel is alloy so it's a compound?
how about Bronze? nitrogen oxide is a compound.
 
  • #6
Hootenanny
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topsyturvy said:
sodium chloride is an ionic compound.
Yup.
stainless steel is alloy so it's a compound?
Yup
how about Bronze?
Bronze is an alloy, and thus is a compound.
nitrogen oxide is a compound.
Yup
 
  • #7
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ok. thanks. but to pick out 2 groups which contain 1 element, 1 compound and 1 mixture. so i should pick D and which one?
A.) gold, sodium chloride, steel. ( there's only one element. no mixture.)
B.) oxygen,iodine , air ( 2 elements. 1 mixture.)
C.) methane, iron(III)chloride, sea-water. (there's 2 mixture. 1 compound.)
E.) bronze, stainless steel, nitrogen(IV)oxide (3 compounds.)

???
 
  • #8
Hootenanny
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topsyturvy said:
ok. thanks. but to pick out 2 groups which contain 1 element, 1 compound and 1 mixture. so i should pick D and which one?
A.) gold, sodium chloride, steel. ( there's only one element. no mixture.)
B.) oxygen,iodine , air ( 2 elements. 1 mixture.)
C.) methane, iron(III)chloride, sea-water. (there's 2 mixture. 1 compound.)
E.) bronze, stainless steel, nitrogen(IV)oxide (3 compounds.)

???
One of them is a compound.
 
  • #9
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methane and sodium chloride both are compound.
 
  • #10
Hootenanny
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My apologies, after further research it appears that alloys are mixtures not compounds as they donot have a definite make up.
 
  • #11
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i see. okok. so steel, stainless steel and bronze are all mixtures?
so A and D is the answer.?
 
  • #12
Hootenanny
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topsyturvy said:
i see. okok. so steel, stainless steel and bronze are all mixtures?
so A and D is the answer.?
Yes, I would agree with you there, again apologies for the confusion, its a while since I have done anything like this :blushing:
 
  • #13
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it's okay. thanks lotsa. :biggrin:
 

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