The chemical equation below shows the burning of magnesium (mg) with oxygen (o2) to form magnesium oxide (mgo).

2mg + o2 mc009-1.jpg 2mgo

the molar mass of o2 is 32.0 g/mol. what mass, in grams, of o2 is required to react completely with 4.00 mol of mg?
2.00

64 grams of will be required to react completely with 4 moles of Mg.

Explanation: The chemical equation of burning of magnesium is given by:

By stoichiometry,

2 moles of Magnesium require 1 mole of oxygen to produce 2 moles of MgO.

Amount of required to form MgO can be calculated by:

Molecular mass of

                               = 64 grams

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

i think so it’s will be b yes i believe its