Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. ?

Question

Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen.  ?

Roger the Mole · Accepted Answer

2 Mg + O2 → 2 MgO

(4.99 g Mg) / (24.30506 g Mg/mol) = 0.20531 mol Mg
(8.79 g O2) / (31.99886 g O2/mol) = 0.27470 mol O2

0.20531 mole of Mg would react completely with 0.20531 x (1/2) = 0.102655 mole of O2, but there is more O2 present than that, so O2 is in excess and
Mg is the limiting reactant.

(0.20531 mol Mg) x (2 mol MgO / 2 mol Mg) x (40.3044 g MgO/mol) x (84.5 / 100) =
6.99 g MgO (product)

lenpol7 · Answer

Pure magnesium ribbon is NOT found.!!!! It is chemically manufactured.  In nature magnesium  exists as the ion Mg^"+ in a substance like MgCO3 (Magnesium carbonate).  It is too reactive a metal  to be found in nature.

? · Answer

Magnesium ribbon will burn in the open air if you put pure oxygen on magnesium ribbon it will burn like crazy

Anonymous · Answer

Well, magnesium ribbon does exist because it's manufactured, and it does burn very readily.

sunshine_mel · Answer

...is that a question or a statement?

Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. ?

5 Answers