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3 years ago

A mixture is -

Chemistry

1 answer:

Studentka2010 [4]3 years ago

4 0

B. a physical combination of two or more different materials.

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Aluminum–lithium (Al–Li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of

brilliants [131]

Answer:

6.54% is the required concentration of lithium in an alloy (Al–Li).

Explanation:

Suppose 100 grams of an alloy of aluminium and lithium.

Density of an alloy = d $2.14 g/cm^3$

Volume of an alloy = V

$V=\frac{100 g}{2.14 g/cm^3}=46.73 cm^3$

Volume of aluminum = $v_1$

Mass of aluminum = x

Density of aluminum = $d_1=2.71 g/cm^3$

$v_1=\frac{x}{d_1}$

Volume of lithium = $v_2$

Mass of lithium = y

Density of lithium= $d_2=0.534 g/cm^3$

$v_2=\frac{y}{d_2}$

$x+y=100$ ..[1]

$v_1+v_2=V$

$\frac{x}{d_1}+\frac{y}{d_2}=46.73 cm^3$

$\frac{x}{2.71}+\frac{y}{0.534}=46.73$ ..[2]

Solving [1] and [2] :

we get :

x = 93.46 g

y = 6.54 g

Concentration of Li (in wt%) that is required:

$Li\%=\frac{6.54 g}{100 g}\times 100=6.54\%$

5 0

3 years ago

Whats a process that keeps food safe and clean

Ray Of Light [21]

If its vegtables u clean it and keep it cool or if its any other kind of food keep it cool

8 0

3 years ago

Read 2 more answers

Compound Y has a distribution coefficient of 4.0 when extracted from water with chloroform, with Y being more soluble in chlorof

Aleks04 [339]

Answer:

There are needed 3 extractions to extract at least 95%

Explanation:

The distribution coefficient of a compound is defined as the ratio in concentration of the compound in the organic solvent and the concentration in the aqueous solution:

K = Concentration organic solvent / Concentration in water

Assuming as initial amount of the organic solvent: 100% and X as the amount of Y that is extracted

<em>First extraction:</em>

4 = X / 10mL / (100-X) / 50mL

4 = 50X / 1000-X

4000 - 4X = 50X

4000 = 54X

X = 74.1%

In the first extraction, 74.1% of Y is extracted

And will remain: 100 - 74.1 = 25.9%

<em>Second extraction:</em>

4 = X / 10mL / (25.9-X) / 50mL

4 = 50X / 259-X

1036 - 4X = 50X

1036 = 54X

X = 19.2%

In the second extraction, 19.2% of Y is extracted

And will remain: 25.9 - 19.2 = 6.7%

<em>Third extraction</em>

4 = X / 10mL / (6.7-X) / 50mL

4 = 50X / 67-X

268 - 4X = 50X

268 = 54X

X = 5.0%

In the first extraction, 5.0% of Y is extracted

And are extracted:

74.1% + 19.2% + 5.0% = 98.3%

That means there are needed 3 extractions to extract at least 95%

4 0

2 years ago

What are 4 energy transfer

Klio2033 [76]

What kind of energy transfer

5 0

3 years ago

Pls help

Simora [160]

Heat required to raise the temperature = 159.505 J

<h3>Further explanation</h3>

Given

c = specific heat of Beryllium = 1.825 J/g C

m = mass = 2.3 g

Δt = Temperature difference : 60 - 22 = 38 °C

Required

Heat required

Solution

Heat can be formulated

Q = m.c.Δt

Input the value :

Q = 2.3 x 1.825 x 38

Q = 159.505 J

8 0

2 years ago