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sammy [17]
3 years ago
11

An equimolar mixture of X (g) and Y (g) is placed inside a rigid container at constant temperature. The particle diagram above r

epresents the changes that occur over time. Based on the particle
diagram, which of the following best predicts whether or not the system has reached equilibrium by 300 s?
a. It is not possible to determine that the system has reached equilibrium by 300 s because the stoichiometry of the reaction is not known.

b. it is not possible to determine that the system has reached equilibrium by 300 s because the amounts of X, Y, and XY have continued to change

c. The system has reached equilibrium by 300 s because the rate of formation of XY is constant
d. The system has reached equilibrium by 300 s because the rates of consumption of X and Y are equal

Chemistry
1 answer:
iris [78.8K]3 years ago
6 0

Answer:

B

Explanation:

t= 300s has more XY than t=200s, which means that it continues to change

*i think

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A. Atoms of chlorine (Cl)

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How many formula units are in 239.2g of <br> Br2<br> MgCl2<br> H2O<br> Fe
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The formula units in the substances are as follows:

  • Br2 = 8.99 × 10^23 formula units
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  • H2O = 2.57 × 10^24 formula units
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<h3>How many moles are in 239.2 g of the given substances?</h3>

The moles of the substances are determined from their molar mass.

Molar mass of the substances is given as follows:

  • Br2 = 160 g/mol
  • MgCl2 = 95 g/mol
  • H2O = 18 g/mol
  • Fe = 56 g/mol

Formula units = mass/molar mass × 6.02 × 10^23

The formula units in the substances are as follows:

  • Br2 = 239.2/160 × 6.02 × 10^23 = 8.99 × 10^23 formula units
  • MgCl2 = 239.2/95 × 6.02 × 10^23 = 1.51 × 10^24 formula units
  • H2O = 239.2/18 × 6.02 × 10^23 = 2.57 × 10^24 formula units
  • Fe = 239.2/56 × 6.02 × 10^23 = 2.57 × 10^24 formula units

In conclusion, the number of formula units is derived from the moles and Avogadro number.

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