The balanced chemical equations are as follow:
4Na + O2 ------ 2Na2O
The mass of the product formed when 250.0g of sodium reacts with excess oxygen is 396.8g.
<h3>What is Balanced chemical equation? </h3>
A chemical equation is said to be balanced if the number of atoms or molecules of elements on reactant side is equal to the number of atoms or molecules of elements on product side.
This is based on the law of conservation of mass which says that the mass neither be created nor
be destroyed but it transferred from one form to another form.
From balanced chemical equation we concluded that 4 moles of sodium react with oxygen to produce 2 moles of product.
Or, 1 moles of sodium react with oxygen to produce 1/2 moles of product.
Moles = given mass/ molar mass
molar mass of sodium = 23 g
= 250 / 23 = 10.8 mol of Na
Thus, 10.8 mol of sodium react with oxygen to produce (1/2) × 10.8 moles of product.
10.8 mol of sodium react with oxygen to produce 5.4 moles of product.
In mass, 5.4 × molar mass of Na2O
5.4 × 62 = 396. 8 g
Thus, we concluded that the balanced chemical equations are as follow:
C2H4 + 3O2 ------- 2CO2 + 2H2O
The mass of the product formed when 250.0g of sodium reacts with excess oxygen is 396.8g.
learn more about balanced chemical equation:
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