Consider the following chemical equation. how many moles of seo3 can be produced from 35
g of oxygen and excess selenium?
25e +302 - 25e03

35 g of Oxygen will give 59.7 g of SeO3

Explanation:

Atomic number of SeO3 = 34 + 3×16 =  82 g

In this reaction 3 moles of oxygen gives 2 moles of SeO3

therefore one mole of oxygen will give moles of SeO3

that is 32 g of oxygen will give g of SeO3

therefore 35 g of oxygen will give g of SeO3

=59.7 g of SeO3

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.