posted by boooooooooooyyyyyyy .
Which of the following is a pure substance? Choose all that apply. Choose 2.
I think it is A and C
sorry. Neither one, if by "pure substance" you mean an element.
Nickel and saltwater.
Rust is made up of iron, copper, and trace amounts of gold. So it would be B and C.
Nickel is an element
Fruit juice = mixture
salt water = solution of NaCl and others in water
rust is a compound (oxide of iron) of iron and oxygen as they showed you Fe2O3 !
You have several really far out replies posted. Rusty Gold ????
Maybe I'm out of touch and need to go back to school.When I read this I consider rust (if Fe2O3) as a pure substance. Actually it isn't Fe2O3 either but a mixture of Fe2O3 and FeO. When I read nickel I read 5 cent piece and that isn't pure. I would chalk this up to a poorly worded question.