Elements, Compounds and Mixture

[topsyturvy]

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?

thanks lotsa.

 

[Hootenanny]

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?

thanks lotsa.

You may want to think again, B has two elements and one mixture. D is correct.

 

[topsyturvy]

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?

 

[Hootenanny]

is sodium chloride a mixture?

Sodium chloride is an ionic...

 

[topsyturvy]

sodium chloride is an ionic compound.
stainless steel is alloy so it's a compound?
how about Bronze? nitrogen oxide is a compound.

 

[Hootenanny]

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

 

[topsyturvy]

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.)

?

 

[Hootenanny]

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.

 

[topsyturvy]

methane and sodium chloride both are compound.

 

[Hootenanny]

My apologies, after further research it appears that alloys are mixtures not compounds as they don't have a definite make up.

 

[topsyturvy]

i see. okok. so steel, stainless steel and bronze are all mixtures?
so A and D is the answer.?

 

[Hootenanny]

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

 

[topsyturvy]

it's okay. thanks lotsa.