Which of the following statements about conservation of mass is true?
2 answers:
Answer: Option (d) is the correct answer.
Explanation:
According to law of conservation of mass, mass can neither be created nor it can be destroyed as it can only be transferred from one form to another.
This means that in a chemical reaction the mass of reactants is equal to the mass of products.
For example,
Total mass of reactants is as follows.
g/mol
= 116 g/mol
Total mass of products is as follows.
2NaCl =
= (2 \times 58) g/mol
= 116 g/mol
Hence, we can conclude that mass is conserved in both physical and chemical changes.
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Answer:
(a)
(b)
Explanation:
Hello,
(a) In this case, for the given chemical reaction, the law of mass action becomes:
In such a way, as 1.20 g of benzyl alcohol are placed into a 2.00-L vessel, the initial concentration is:
Hence, by writing the law of mass action in terms of the change due to equilibrium:
Solving for by using a quadratic equation one obtains:
Thus, the equilibrium concentration of benzyl alcohol is computed:
With that concentration the partial pressure results:
(b) Now, the fraction of benzyl alcohol that is dissociated relates its equilibrium concentration with its initial concentration:
Best regards.
Answer: 60.7 g of will be formed.
Explanation:
To calculate the moles :
The balanced chemical reaction is
is the limiting reagent as it limits the formation of product and
is the excess reagent.
According to stoichiometry :
6 moles of produce = 4 moles of
Thus 2.68 moles of will produce=
of
Mass of
Thus 60.7 g of will be formed by reactiong 60 L of hydrogen gas with an excess of