Your teacher gives you a black powder. When you dissolve the powder in water, you see red particles that float to the top, black particles that sink to the bottom, and a green liquid. Was the black powder a pure substance, mixture, element, or compound?

compound

element

pure substance

mixture
I think it is A

Question

Your teacher gives you a black powder. When you dissolve the powder in water, you see red particles that float to the top, black particles that sink to the bottom, and a green liquid. Was the black powder a pure substance, mixture, element, or compound?

 compound

        element

        pure substance

        mixture
I think it is A

micahm · Answer

@Katniss12345

anonymous · Answer

hang on a sec

mayankdevnani · Answer

@micahm  read the question carefully,the black powder separates into red and black particles.
So,this is ofcourse a MIXTURE,because mixture is easily separable

mayankdevnani · Answer

understood? @micahm

mayankdevnani · Answer

like mixture of SAND and pebbles,we can separate it easily by dissolving in water,you can see that pebbles settle down.
So this is somewhat example of your question

anonymous · Answer

i think it's a mixture because this variety of products in reacting a compound with water is seldom occur. am i right @mayankdevnani ?

mayankdevnani · Answer

correct :)

mayankdevnani · Answer

but it is not true for all cases.. @moradi312

anonymous · Answer

mixture

anonymous · Answer

why @mayankdevnani ?

micahm · Answer

ok so the sand is what changing it

anonymous · Answer

can you explain more @mayankdevnani ?

mayankdevnani · Answer

you can also use CHROMATOGRAPHY but not in this case. http://www.infoplease.com/dk/science/encyclopedia/separating-mixtures.html

mayankdevnani · Answer

http://www.answers.com/Q/Can_A_mixture_of_milk_and_water_can_be_separated_by_filteration @moradi312

micahm · Answer

here is my next q

  A molecule of ozone gas has three atoms of oxygen. Which of these describes ozone most specifically?

compound

        element

        pure substance

        mixture
I think it 's C

mayankdevnani · Answer

http://education-portal.com/academy/lesson/states-of-matter-and-methods-of-separating-mixtures.html#lesson http://amrita.olabs.co.in/?sub=73&brch=2&sim=96&cnt=1 http://www.800mainstreet.com/e3/e3.html for you.. @moradi312 hope you understand better :)

micahm · Answer

ok are those free

mayankdevnani · Answer

Ozone (O3) is a molecule comprised of three oxygen atoms. As such, it is a compound.

mayankdevnani · Answer

https://answers.yahoo.com/question/index?qid=20060924213458AAejrqX

anonymous · Answer

don't you think elements and compounds are pure substances? @micahm

micahm · Answer

compound most liky

micahm · Answer

thanks

anonymous · Answer

ozone is an element because it just made up by oxygen.