Question

A science teacher placed a magnesium wire in flame.the wire turned white where the flame touched it. which statement best explains the chemical change

A. a new substance formed

D. the magnesium wire changed shape

the subject is science

Answer 1

Explanation:A new substance formed. Promise.

Answer 2

A

Step-by-step explanation:

The correct answer would be that a new substance is formed.

When magnesium wire is burnt in the presence of oxygen, the wire reacts with oxygen and a new substance known as magnesium oxide is formed. The new substance is usually white in color and the equation of the reaction is as below:

`2 Mg (s) + O_2 (g) --> 2 MgO (s)` (white)

Hence, the correct option is A.