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Alex787 [66]
3 years ago
12

Will mark as Brainliest.

Chemistry
1 answer:
sertanlavr [38]3 years ago
8 0
<span>Atomic radius generally increases as we move 
</span><span>down a group and from right to left across a period.</span>
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a compound with the empirical formula CH2 has a molar mass of 112 g/mol. What is the molecular formula for this compound?
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Water that is heated by the sun evaporates.
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At 2°C, the vapor pressure of pure water is 23.76 mmHg and that of a certain seawater sample is 23.09 mmHg. Assuming that seawat
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Answer:

0.808  M

Explanation:

Using Raoult's Law

\frac{P_s}{Pi}= x_i

where:

P_s = vapor pressure of sea water( solution) = 23.09 mmHg

P_i = vapor pressure of pure water (solute) = 23.76 mmHg

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x_2 = 1- 0.9718

x_2 = 0.0282

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x_2 = \frac{n_2}{n_i+n_2}  ------ equation (2)

where; (n_2) = number of moles of sea water

(n_i) = number of moles of pure water

equating above equation 1 and 2; we have :

\frac{n_2}{n_i}= \frac{0.0282}{0.9178}

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NOW, Molarity =  \frac{moles of sea water}{mass of pure water }*1000

= \frac{0.02901}{18}*1000

= 0.001616*1000

= 1.616 M

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