Question

when magnesium ribbon is exposed in moist air what is this white powder ?write it's formula.​

Answer 1

Answer:

The ribbon burns with a bright white light. Intense heat is also produced in this reaction. Here, when magnesium burns, it reacts with the oxygen found in air to form a powdery ash called magnesium oxide. Chemical equation: Magnesium plus Oxygen gives Magnesium.

Answer 2

Answer:

2Mg+ 02-------> 2Mg0.....{ balanced chemical equation}

here,

Mg= Magnesium Ribbon

and,

O2= oxygen

when magnesium ribbon is exposed in moist air, the white powder is magnesium oxide and it the product of the reactants Magnesium and Oxygen.

=> The above reaction is a combination reaction and also an oxidation reaction

hope this helps! ♥☺✌