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2 years ago

An accepted and universally true explanation of observed facts is a

Chemistry

1 answer:

Mekhanik [1.2K]2 years ago

5 0

An accepted and universally true explanation of observed facts is a law.

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When 61.6 g of alanine (C3H7NO2) are dissolved in 1150. g of a certain mystery liquid X, the freezing point of the solution is 2

MrRissso [65]

Answer:

Explanation:

From the given information:

TO start with the molarity of the solution:

$= \dfrac{61.6 \ g \times \dfrac{1 \ mol \ C_3H_7 NO_3}{89.1 \ g} }{1150 \ g \times \dfrac{1 \ kg}{1000 \g }}$

= 0.601 mol/kg

= 0.601 m

At the freezing point, the depression of the solution is $\Delta \ T_f = T_{solvent}- T_{solution}$

$\Delta \ T_f = 2.9 ^0 \ C$

Using the depression in freezing point, the molar depression constant of the solvent $K_f = \dfrac{\Delta T_f}{m}$

$K_f = \dfrac{2.9 ^0 \ C}{0.601 \ m}$

$K_f = 4.82 ^0 C / m}$

The freezing point of the solution $\Delta T_f = T_{solvent} - T_{solution}$

$\Delta T_f = 7.3^ 0 \ C$

The molality of the solution is:

$= \dfrac{61.6 \ g \times \dfrac{1 \ mol \ NH_4Cl}{53.5 \ g} }{1150 \ g \times \dfrac{1 \ kg}{1000 \g }}$

Molar depression constant of solvent X, $K_f = 4.82 ^0 \ C/m$

Hence, using the elevation in boiling point;

the Vant'Hoff factor $i = \dfrac{\Delta T_f}{k_f \times m}$

$i = \dfrac{7.3 \ ^0 \ C}{4.82 ^0 \ C/m \times 1.00 \ m}$

$\mathbf {i = 1.51 }$

3 0

2 years ago

Im sooooooooooooooooooooooooo cufused on science

Elena-2011 [213]

Answer:

What do you need please to understand?

6 0

2 years ago

What is the approximate pressure of a storage cylinder of recovered R-404A that does not contain any non-condensable impurities

gregori [183]

Answer:

288 psig

Explanation:

4 0

3 years ago

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Convert 44 centimeters to meters.<br> A. 4 m<br> B. 4.4 m<br> C. 0.44 m<br> D. 0.044 m

Hoochie [10]

The answer is C. 0.44 m

8 0

3 years ago

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Which would be the biggest long-term benefit of building a city recycling center? A. building the new recycling building

igor_vitrenko [27]

C. reducing the amount of garbage

Explanation:

The biggest long-term benefit of building a city's recycling building is that it helps to reduce that amount of garbage.

Recycling is simply the collection and processing of waste materials into new products that can be used again.

Waste recycling helps to reduce that actual proportion and percentage of materials to be considered waste.
The overall long term goal of any recycling procedure is to reduce the amount of garbage in the environment.

learn more:

Untreated wastes brainly.com/question/4080706

#learnwithBrainly

7 0

3 years ago