Question

Magnesium is a highly flammable element which is easily combustible in the presence of oxygen: 2Mg + O2 --> ?? + heat How many atoms would you expect to find on the product side of this equation?

Answer 1

Answer: 2 atoms of MgO will be there on the product side.

Explanation: We are given an element Magnesium which is highly flammable and when reacted with oxygen will follow equation:

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)+heat$

By Stoichiometry,

2 moles of magnesium solid reacts with 1 mole of oxygen gas to produce 2 moles of magnesium oxide solid which is white in color with the release of heat.

At the product side, 2 atoms of magnesium oxide will be present.

Answer 2

The  number of atoms  would expect to find  on the product side of the reaction between Mg and O₂  is  4  atoms

Explanation

Mg  react  with O₂  to produce MgO  according   to  reaction below

2Mg  +O₂ →2 MgO   +heat

MgO is the product ,therefore  the  number of atoms  in product  side is

= 2 [ atoms  of Mg + atoms  of O]

= 2[ 1+1]  = 4 atoms