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3 years ago

Formal units are formed by?

Chemistry

1 answer:

cupoosta [38]3 years ago

4 0

Answer:

However, when formal units are used to measure length, the measurement can usually be read from a scale on a ruler or tape, which shows units of a particular size. Unit iteration involves knowledge of repeatedly placing identical tightly packing units so that there are no overlaps or gaps.

Explanation:

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Two humid streams are adiabatically mixed at 1 atm pressure to form a third stream. The first stream has a temperature of 40C, a

MaRussiya [10]

Answer: Third stream’s temperature is $33.2^{o}C$ and its relative humidity is 50%.

Explanation:

According to the Psychrometric chart.

For the first stream, we have the following.

$T_{1} = 40^{o}C
$ , R.H = 40%

V = 3L/s , W = 19 gm of moisture/kg of dry air

$h_{1}$ = 89 kj/kg , $v_{1} = 0.913 m^{3}/kg$

For the second stream, we have the following.

$T_{2} = 15^{o}C$

R.H = 80%

V = 1 L/s

W = 8.5 gm of moisture/kg of dry air

$h_{2}$ = 36.5 kj/kg

$v_{2} = 0.828 m^{3}/kg$

Now,

$ma_{1} = \frac{V}{v_{1}}$

= $\frac{3}{0.913}$

= 3.286 kg/s

$ma_{2} = \frac{V}{v_{2}}$

= $\frac{1}{0.828}$

= 1.2077 kg/s

We will calculate the value of $ma_{3}$ as follows.

$ma_{3} = ma_{1} + ma_{2}$

= 3.286 kg/s + 1.2077 kg/s

= 4.5 kg/s

Now, heat balance will be as follows.

$ma_{1}h_{1} + ma_{2}h_{2} = ma_{3}h_{3}$

$h_{3}$ = 74.7855 kj/kg

Hence, the moisture balance will be calculated as follows.

$ma_{1}W_{1} + ma_{2}W_{2} = ma_{3}W_{3}$

$W_{3}$ = 16.155

Now, again using the psychrometric chart we will find the value of temperature and relative humidity as follows.

Values of $T_{3}$ and $R.H_{3}$ against $W_{3}$ and $h_{3}$ are:

$T_{3} = 33.2^{o}C$

R.H = 50%

Thus, we can conclude that third stream’s temperature is $33.2^{o}C$ and its relative humidity is 50%.

5 0

3 years ago

When you reach the temperature of the ___________________ point, you become a liquid.

vovikov84 [41]

When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt. If you were salt, sugar, or rock, your melting point is higher than that of water.

3 0

4 years ago

Read 2 more answers

Two gases helium and x are released from one end of an evacuated long cylinder at the same time if it takes helium atoms 3 times

Gemiola [76]

Answer:

Hypoflorous acid, HOF

Explanation:

From the question, we're told that the helium atoms effuses 3 times than the said gas X.

We can determine the rate of effusion by using the formula

r is inversely proportional to 1/√M, where M is the molecular mass of the gas.

And also,

r is inversely proportional to 1/t, where t is the time taken for effusion.

From both formulas I listed, we can conclude that t is directly proportional to √M. And thus we proceed.

The molecular mass of Helium is 4.

tHe = tX/3, where tx is the time taken for the unknown gas X

As of yet, we don't know the molecular mass of X. Next, we say that

tX/tHe =√Mx/MHe

3 = √Mx/4

If we square both the sides, to remove the square root, we have

9 = Mx/4

Mx = 36

The molecular mass of the unknown gas X is 36.

4 0

3 years ago

In the chromatography of the reaction mixture, water absorbed on cellulose functioned as the stationary phase. What was the prin

kotegsom [21]

Answer:

HYDROGEN BONDING (determines rate of migration)

Explanation:

There are two forces acting on the sample:

Gravity/ Capillary action force: This can include gravity, pumping of fluid through the tube, or the capillary action of the liquid when moving up the sheet of paper.

Interactive force with the gel used: The another force is dependent on the fundamental properties of individual components with fluid. These can be polarity, charge, adhesive nature, etc.

The most type of the chromatography is exploiting polarity of the molecules. So in TLC, we have a sheet coated with silica gel usually (polar), and a liquid that contains a mixture of different compounds which is being pushed up paper through the capillary action.

Some liquid's polarity will be greater than the others, and that's why the liquids move at various speeds based on favorable/ unfavorable interactions between different compounds in the mixture.

In this way, one can separate a mixture into individual constituting parts.

Thus, the relative amount of hydrogen bonding to the stationary phase will determine the Relative Rate of Migration of the various components in the sample.

4 0

3 years ago

Please help me ASAP!!

muminat

Answer:

F,Cl,N,I,Se,H

Explanation:

polarity increases as electronegativity increases i guess so that is supposed to be the answer

6 0

3 years ago