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pav-90 [236]
2 years ago
10

Bicyle tyres become flat when the weather is clod. Explain​

Chemistry
1 answer:
Andreas93 [3]2 years ago
6 0

Answer:

Explained below

Explanation:

When cold weather is approaching, a lot of motorists usually experience a warning light that indicates low-pressure on the dash board or they simply notice that the tires now look a little less full than they should have prior to that time.

The primary reason for that low pressure indication is the drop in temperatures, which now causes the air to get denser and in return, consequently lower the tire pressure.

In essence the tires will lose air pressure because they contract in the cold season.

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A solution of sodium chloride in water has a vapor pressure of 19.6 torr at 25°C. What is the mole fraction of NaCl in this solu
Debora [2.8K]

Answer:

Mole fraction of Nacl is 0.173

Explanation:

we know that

P_{sol}=\chi_{solvent}P^0_{solvent}

where,

P sol  - the vapor pressure of the solution

χ  solvent - the mole fraction of the solvent

P ∘ solvent  - the vapor pressure of the pure solvent

This means that in order to be able to calculate the mole fraction of sodium chloride, you need to know what the vapor pressure of pure water is at  

25 ° C  You can use an online calculator to find that the vapor pressure of pure water at  25 C  is equal to about  23.8 torr .

\chi_{water}= \frac{P{sol}}{P^0{water}}

\chi_{water}= \frac{19.6}{23.8}

=0.827

Also we know that

\chi_{water}+\chi_{Nacl}= 1

This means that the mole fraction of sodium chloride is

χ_{Nacl}= 1-Χ_{water}

= 1-0.827 =0.173

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How many moles of H3PO4 would produce 12 moles of water in this reaction? ЗKOH + H3PO4 K3PO4 + 3H20
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Answer:

4 moles of H₃PO₄

Explanation:

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Number of moles of H₃PO₄ = ?

Solution:

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So;    12 moles of water would be produced from \frac{12}{3} = 4 moles of H₃PO₄

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Answer:

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