Answer:
Element Symbol Mass percent
Magnesium. Mg. 20.192%
Oxygen. O. 53.168%
Sulfur. S. 26.639%
Explanation:
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Answer: Increasing the concentration of a reactant or decreasing the concentration of the product.
Explanation: For the equilibrium of the reaction to shift to the left, we must decrease the concentration of a reactant or increase the concentration of the product. This is based on Le Chatelier's principle which describes the effect on the equilibrium of changes in concentration or pressure of a product or a reactant. Adding more products in a system would disturb the equilibrium thus it would cause to reestablish it by shifting the reaction to the left producing the reactants. This would also be the same when you decrease the number of reactants in the system.
Answer:
Mole fraction H2: 0.625
Mole fraction O2: 0.375
Molecular weight: 13.25g/mol
Mass fraction H2: 0.094
Mass fraction O2: 0.906
Explanation:
Moles fraction is defined as the ratio between moles of a substance and total moles presents in a mixture:
<em>Mole fraction H2 = 5kmol / (5kmol + 3kmol) = </em><em>0.625</em>
<em>Mole fraction O2 = 3kmol / (5kmol + 3kmol) = </em><em>0.375</em>
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Molecular weight is defined as the mass per mole of substance:
Mass H2 = 5kmol * (2kg / kmol) = 10kg
Mass O2 = 3kmol * (32kg / kmol) = 96kg
<em>Molecular weight:</em>
106kg / 8kmol = 13.25g/mol
In the same way, mass fraction is the ratio between mass of a substance and total mass of the mixture:
<em>Mass fraction H2 = 10kg / (10kg + 96kg) = </em><em>0.094</em>
<em>Mass fraction O2 = 96kg / (10kg + 96kg) = </em><em>0.906</em>
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The process of influencing chemical bonds to lower the activation energy of a reaction is called catalysis.
A catalyst is a substance that increases the rate of reaction. A catalyst functions by lowering the activation energy of the reaction system.
Lowering the activation energy provides an alternative lower energy route for the desired reaction to occur.
Such an alternative route always has a lower maxima on the potential energy diagram of the reaction.
Hence, the process of influencing chemical bonds to lower the activation energy of a reaction is called catalysis.
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