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2 years ago

What are 5 difference between simple distillation and fractional distillation??

Chemistry

1 answer:

FrozenT [24]2 years ago

3 0

Answer:

simple distillation

1)It is used to seprate mixture of two miscible liquids having different boiling points.

fractional distillation

1)It is used to separate the mixtore of two or more liquids of close boiling range.

simple

2)In simple distillation, there is no fractional column.

fractional

2)In fractional distillation, a fractional column is used.

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25.2 mL of water are placed in a graduated cylinder. A 22.6 g stone is dropped in, and the water level rises to 32.4 mL. Find th

VMariaS [17]

<span>Displaced volume :

final volume - initial volume

32.4 mL - 25.2 mL => 7.2 mL

Density = mass / volume

D = 22.6 g / 7.2 mL

D = 3.1388 g/mL

hope this helps!</span>

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3 years ago

Consider the following elementary reaction:

Marat540 [252]

Answer:

$[NO]=\frac{k_{-1}}{k_1} [N_2O_2]$

Explanation:

Hello!

In this case, since the reaction may be assumed in chemical equilibrium, we can write up the rate law as shown below:

$r=-k_1[NO]+k_{-1}[N_2O_2]$

However, since the rate of reaction at equilibrium is zero, due to the fact that the concentrations remains the same, we can write:

$0=-k_1[NO]+k_{-1}[N_2O_2]$

Which can be also written as:

$k_1[NO]=k_{-1}[N_2O_2]$

Then, we solve for the concentration of NO to obtain:

$[NO]=\frac{k_{-1}}{k_1} [N_2O_2]$

Best regards!

8 0

3 years ago

You open a can of soda at room temperature and hear a hiss. What factor has changed inside container

klio [65]

The soda has been exposed to oxygen. Therefore, a chemical reaction is taking place.

6 0

3 years ago

Read 2 more answers

The solubility of oxygen gas in water at 40 ∘c is 1.0 mmol/l of solution. What is this concentration in units of mole fraction?

juin [17]

The formula for mole fraction is:

$mole fraction of solute = \frac{number of moles of solute}{total number of moles of solution}$ -(1)

The solubility of oxygen gas = 1.0 mmol/L (given)

1.0 mmol/L means 1.0 mmol are present in 1 L.

Converting mmol to mol:

$1.00 mmol\times \frac{1 mol}{1000 mmol} = 0.001 mol$

So, moles of oxygen = 0.001 mol

For moles of water:

1 L of water = 1000 mL of water

Since, the density of water is 1.0 g/mL.

$Density = \frac{mass}{volume}$

$Mass = 1.0 g/ml\times 1000 mL = 1000 g$

So, the mass of water is 1000 g.

Molar mass of water = 18 g/mol.

Number of moles of water = $\frac{1000 g}{18 g/mol} = 55.55 mol$

Substituting the values in formula (1):

$mole fraction = \frac{0.001}{55.55+0.001}$

$mole fraction = 1.8\times 10^{-5}$

Hence, the mole fraction is $1.8\times 10^{-5}$ .

7 0

3 years ago

Which statement best describes the movement of atoms in a solid? They are able to slide past each other. They spread apart as fa

ANTONII [103]

The answer is: They have no freedom to move.
However is not completely true, as even in a solid atoms still a move a bit (vibrations).

If atoms were able to slide past each other, then we would have a liquid not a solid. Liquids "flow" but never really "break apart" this is because atoms are sliding between them, think of these as a bucket of marbles rolling down a slope.

If they are free to move in all directions, then you have a gas; that's why someone uses perfume in a room, eventually everyone smells it.

4 0

4 years ago

Read 2 more answers