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3 years ago

I need another help pls

Chemistry

2 answers:

Hitman42 [59]3 years ago

5 0

where ur question at???

Misha Larkins [42]3 years ago

4 0

Where's the question sisturrrr

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Is A B C or D I need help

Citrus2011 [14]

Your answer would be D!;)

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3 years ago

The normal freezing point of a certain liquid

stepladder [879]

Answer : The molal freezing point depression constant of X is $4.12^oC/m$

Explanation : Given,

Mass of urea (solute) = 5.90 g

Mass of X liquid (solvent) = 450.0 g

Molar mass of urea = 60 g/mole

Formula used :

$\Delta T_f=i\times K_f\times m\\\\T^o-T_s=i\times K_f\times\frac{\text{Mass of urea}\times 1000}{\text{Molar mass of urea}\times \text{Mass of X liquid}}$

where,

$\Delta T_f$ = change in freezing point

$\Delta T_s$ = freezing point of solution = $-0.5^oC$

$\Delta T^o$ = freezing point of liquid X= $0.4^oC$

i = Van't Hoff factor = 1 (for non-electrolyte)

$K_f$ = molal freezing point depression constant of X = ?

m = molality

Now put all the given values in this formula, we get

$[0.4-(-0.5)]^oC=1\times k_f\times \frac{5.90g\times 1000}{60g/mol\times 450.0g}$

$k_f=4.12^oC/m$

Therefore, the molal freezing point depression constant of X is $4.12^oC/m$

4 0

3 years ago

Which of these elements is the most reactive?<br> potassium<br> calcium<br> titanium<br> scandium

vladimir1956 [14]

Answer:

Scandium is the most reactive

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3 years ago

Scientific notation.

stiv31 [10]

Answer:

1.85 x 10^ -5

Explanation:

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3 years ago

Describe briefly how to obtain the radial probability of an electron

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Explanation:

The radial distribution function gives the probability density for an electron to be found anywhere on the surface of a sphere located a distance r from the proton. Since the area of a spherical surface is 4πr2, the radial distribution function is given by 4πr2R(r)∗R(r).

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2 years ago