A student passes a magnet over 10 grams of a powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?

A mixture

Explanation:

The substance whose magnetic properties is tested is mixture of many compounds, elements or molecules.

A mixture has the following properties:

Since a part of the mixture responds differently to magnetism, we can say, the other part is made up of a different set of compound.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).