How would an increase in gradient affect the speed of water

Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should

atroni [7]

Answer:

$(NH_4)_3PO_4$ 0.075 m solution has the lowest freezing point.

Explanation:

Depression in freezing point is given by:

$\Delta T_f=T-T_f$

$\Delta T_f=K_f\times m$

$\Delta T_f=iK_f\times \frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent in Kg}}$

where,

$\Delta T_f$ =Depression in freezing point

$K_f$ = Freezing point constant of solvent

1 - van't Hoff factor

m = molality

According question, molality of all the solutions are same and are in prepared with same solvent. So, values of molality and $K_f$ will remain the same and will not effect the freezing point of the solution.

The lowering in freezing point will now depend upon van't Hoff factors of the solutions. Higher the value of van'Hoff factor more will be the lowering in freezing point of the solution.

The van't Hoff factor of $KNO_2$ solution = $i_1=2$

The van't Hoff factor of $LiCN$ solution = $i_2=2$

The van't Hoff factor of $(NH_4)_3PO_4$ solution = $i_3=4$

The van't Hoff factor of $NaI$ solution = $i_4=2$

The van't Hoff factor of $NaBrO_3$ solution = $i_5=2$

The solution of ammonium phosphate has the highest values of van't Hoff factor which will result in maximum lowering of the freezing point of the solution.

Hence, $(NH_4)_3PO_4$ 0.075 m solution has the lowest freezing point.

4 0

3 years ago

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The hydrogen bonding in water creates ________, a cohesive force that enables one to slightly overfill a glass with water or all

ziro4ka [17]

Answer: -

Surface Tension

Explanation: -

Surface tension is cohesive force created as a result of hydrogen bonding, that enables a liquid drop to have a minimum surface area.

Due to it being cohesive, the water top surface is concave in nature, allowing us to hence slightly overfill a glass with water.

Due to surface tension, the surface of water behaves like a stretched membrane, allowing dense objects like a length wise steel needle to float on water.

Thus, the hydrogen bonding in water creates __surface tension__, a cohesive force that enables one to slightly overfill a glass with water or allows denser objects, such as a lengthwise steel needle, to float on water

8 0

4 years ago

The human body excretes nitrogen in the form of urea, NH₂CONH₂. The key step in its biochemical formation is the reaction of wat

Misha Larkins [42]

Mass perventage of nitrogen in urea, arginine, ornithine is 46.67%, 32.2%,21% respectively.

What is Mass perventage ?

Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100.

Molecular mass of urea (NH2CONH2) is= 2× (Atomic mass of N ) + 4 × (Atomic mass of H) + (Atomic mass of C) (Atomic mass of O) = 60

Mass percentage of N = $Total mass of N atoms in the compoundMass of compound×100=2860×100=46.67%$

chemical formula for arginine is C6H14N4O2

molar mass of C6H14N4O2=174g/mol

moles of N atoms in C6H14N4O2=4

mass of N atoms=14*4=56g

mass percent of N in C6H14N4O2=(56/174)*100=32.2%

the chemical formula for ornithine is C5H12N2O2

molar mass of C5H12N2O2=132g/mol

moles of N atoms in C5H12N2O2=2

mass of N atoms in C5H12N2O2=2*14=28

mass percent of N in C5H12N2O2=(28/132)*100=21%

To learn more about urea click on the link below:

brainly.com/question/17812875

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7 0

1 year ago

A group of students conducted an experiment to determine the effect of heat on the germination(sprouting) of sunflower seeds. Wh

pentagon [3]

what grade is this because apparently i like to know what grade it is before i solve it

3 0

3 years ago

What contains elements with similar properties in the periodic table?

Nataly [62]

A) a column

example: earth alkaline metals

6 0

3 years ago

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