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Nikitich [7]
4 years ago
6

1.

Chemistry
2 answers:
mr Goodwill [35]4 years ago
5 0

Answer:

1. Hypertension can occur if too little water is reabsorbed by the nephrons.

Explanation:

Kidneys are special organs that expels out the unwanted harmful substance and excess water from our body. And nephrons are small tiny tubes in the kidneys.  

Drinking water is voluntary. Kidneys in order to preserve water has to keep the extra sodium to maintain the intramedullary hypertonicity. It is more possible that both high salt and low water intake will lead to increase in blood pressure resulting hypertension.

Usimov [2.4K]4 years ago
3 0
<span>In choosing which of following describes the correct relationship between kidney function and blood pressure. The answer, simply put, is letter b: </span><span>Hypertension can occur if too much water is reabsorbed by the nephrons. The last two choices are false, because if they were true, it would have a great impact to statistics of hypertension since only women have a uterus.</span><span>

</span>
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Silicon is an element that is found directly underneath carbon in the periodic table and thus has similar properties to carbon,
kirza4 [7]

Answer:

            Four electrons are present in the valence shell of Silicon.

Explanation:

                   Valence shell electrons are those electrons which are present in the outermost shell of an atom. These valence shell electrons are responsible for in the formation of bonds with other atoms.

                   Silicon having atomic number 14 has fourteen electrons in its neutral state and has the electronic configuration as follow;

                                              1s², 2s², 2p⁶, 3s², 3p²

In given configuration the valence shell (outermost shell) is 3 and the number of electrons present in it are four i.e. 3s² and 3p² (2 + 2 = 4) respectively.

7 0
4 years ago
What mass of nitrogen is needed to fill an 855 L tank at STP?
scoundrel [369]

Answer:

It takes 1,068.76 grams of nitrogen to fill an 855 L tank at STP.

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C or 273.15 °K are used and are reference values for gases.

On the other side, the pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas.

So, in this case:

  • P= 1 atm
  • V= 855 L
  • n= ?
  • R= 0.082 \frac{atm*L}{mol*K}
  • T= 273.15 K

Replacing:

1 atm* 855 L= n* 0.082 \frac{atm*L}{mol*K} * 273.15 K

Solving:

n=\frac{1 atm* 855 L}{0.082\frac{atm*L}{mol*K} *273.15 K }

n= 38.17 moles

Being the molar mass of nitrogen N2 equal to 28 g / mol, you can apply the following rule of three: if there are 28 grams in 1 mole, how much mass is there in 38.17 moles?

mass=\frac{38.17 moles*28 grams}{1 mole}

mass= 1,068.76 grams

<u><em> It takes 1,068.76 grams of nitrogen to fill an 855 L tank at STP.</em></u>

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balandron [24]

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