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monitta
3 years ago
8

Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at

300°C and fuel oil at around 370°C.”
What topic is the teacher most likely talking about?
Chemistry
1 answer:
asambeis [7]3 years ago
6 0

Explanation:

The teacher is most likely talking about the fractional distillation process.

Fractional distillation: It is a separation technique used to separate different components of the given mixture on the basis of their difference in boiling points of the different components. The component with lowest boiling point will get separate out first from the mixture and the vapors formed from boiling are condensed in a separate container.

So, when the fractional distillation of mixture of oils and fuels is carried out  gasoline will separate out first due to lower boiling temperature and then kerosene followed by diesel and others (fuels and oils).

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3 years ago
Please help thank you
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Answer:

K=1.7x10^{-3}

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by firstly setting up the equilibrium expression for the given reaction, in agreement to the law of mass action:

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Next, we plug in the given concentrations on the data table to obtain:

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How many moles are in 0.0073 kg of tantalum?
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Tantalum is the 73rd element in the periodic table with an atomic mass equal to 180.95 g/mol. To determine the number of moles present in the given mass of tantalum above, we simply divide the mass by the atomic mass. 
                   number of moles = (0.0073 kg)(1000 g/ 1kg) ÷ (180.95 g/mol)
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Therefore, there is approximately 0.0403 moles of tantalum in 0.0073 kg. 
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