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3 years ago

Which of the following contain nitrogen?

Chemistry

2 answers:

attashe74 [19]3 years ago

8 0

Answer:

Amino acids contain nitrogen

Explanation:

Monosaccharides and polysaccharides are carbohydrates that are composed of carbon (C), hydrogen (H) and oxygen (O)

Fatty acids are carboxylic acids with a long hydrocarbon chain terminating in a carboxylic acid group. These are again composed of C, H and O

Amino Acids are organic compounds containing both carboxylic acid (COOH) and amino group (NH2). Thus amino acids contain C,H, O and N

iragen [17]3 years ago

3 0

Monosaccharides contain nitrogen

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Malik formed a hypotheses that an increase in atmospheric oxygen levels by 10% would cause red-legged grasshoppers to grow large

sergejj [24]

Answer : Malik's experiment included to create artificial atmospheric oxygen; in order to perform experiment on red-legged grasshopper for growing it larger than normal, the part of recreating or mimicking the artificial oxygen for the experiment with additional 10% increase seems to be bit difficult and this may create a problem in defining the accuracy and precision for the experiment.

8 0

3 years ago

Read 2 more answers

A closed, frictionless piston-cylinder contains a gas mixture with the following composition on a mass basis: 40% carbon dioxide

Hitman42 [59]

Answer:

W=-37.6kJ, therefore, work is done on the system.

Explanation:

Hello,

In this case, the first step is to compute the moles of each gas present in the given mixture, by using the total mixture weight the mass compositions and their molar masses:

$n_{CO_2}=0.8kg*0.4*\frac{1kmolCO_2}{44kgCO_2}= 0.00727kmolCO_2\\\\n_{O_2}=0.8kg*0.25*\frac{1kmolO_2}{32kgO_2}=0.00625kmolO_2\\ \\n_{Ne}=0.8kg*0.35*\frac{1kmolNe}{20.2kgNe}=0.0139kmolNe$

Next, the total moles:

$n_T=0.00727kmol+0.00625kmol+0.0139kmol=0.02742kmol$

After that, since the process is isobaric, we can compute the work as:

$W=P(V_2-V_1)$

Therefore, we need to compute both the initial and final volumes which are at 260 °C and 95 °C respectively for the same moles and pressure (isobaric closed system)

$V_1=\frac{n_TRT_1}{P}= \frac{0.02742kmol*8.314\frac{kPa*m^3}{kmol\times K}*(260+273)K}{450kPa}=0.27m^3\\ \\V_2=\frac{n_TRT_2}{P}= \frac{0.02742kmol*8.314\frac{kPa*m^3}{kmol\times K}*(95+273)K}{450kPa}=0.19m^3$

Thereby, the magnitude and direction of work turn out:

$W=450kPa(0.19m^3-0.27m^3)\\\\W=-37.6kJ$

Thus, we conclude that since it is negative, work is done on the system (first law of thermodynamics).

Regards.

7 0

3 years ago

What is the relationship between an atom's atomic mass and one mole of that atom?

Lelu [443]

The atomic mass is measured in "atomic mass units" (amu). One mole of an element weighs the same atomic mass number, but in grams.
For example, carbon, C, has an atomic mass of 12.011 amu. One mole of carbon has a mass of 12.011 grams.

6 0

4 years ago

20 POINTS!!!!

borishaifa [10]

Answer 1 : The 'Cesium' element on the periodic table is the "best loser" of electrons.

Explanation :

The metals has the tendency to lose the electrons easily than the non-metals.

In all the metals, group 1 elements has more tendency to lose an electron easily than the group 2 elements.

As we know, the all elements in group 1 have one valence electron in their outermost shell. As we go down in a group, the number of shells increases and the valence electrons are away from the nucleus and less tightly bound the electrons to it.

Ionization energy : It is defined as the less amount of energy is required to remove the electron from their valence shell.

As we go down the group, the ionization energy decreases.

Hence, the 'Cesium' element on the periodic table is the "best loser" of electrons.

Answer 2 : The 'Fluorine' element on the periodic table is the "best gainer" of electrons.

Explanation :

The non-metals has the tendency to gain the electrons easily than the metals.

In all the non-metals, group 17 elements has more tendency to gain an electron easily than the group 15 and group 16 elements.

As we know, the all elements in group 17 have seven valence electrons in their outermost shell. As we go down in a group, the atomic size and nuclear charge increases which decreases the attraction of the incoming electron to the nucleus. Therefore, the electron gain enthalpy become less negative as we go down the group.

Hence, fluorine is the most electronegative element in the periodic table.

7 0

4 years ago

What is the total pressure in millimeters of mercury,

forsale [732]

Answer:

87059.50558 pa

Explanation:

Dalton's law of partial pressure states that Ptotal=P1 +P2+ P3

417mmHg + 150mmHg +86mmHg =653 mmHg

convert it to Pa, your answer is 87059.50558Pa.

I hope I'm of help to you

5 0

3 years ago