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Sergio [31]
3 years ago
15

Which of the following two cycles are the most closely related in their role in sustaining life?

Chemistry
2 answers:
EastWind [94]3 years ago
8 0
C because both are either used or is a waste product in all organisms
worty [1.4K]3 years ago
4 0

Answer: d. nitrogen and phosphorus

Nitrogen and phosphorus are important component of the genetic material present in the living organism, required for the expression of genes to perform a desire function in the living organisms. Both nitrogen and phosphorus are chief ingredients of the fertilizers required for the plant growth. Hence, nitrogen and phosphorous are two cycles that are most closely related in their role in sustaining life.

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A saturated solution was formed when 5.16×10−2 L of argon, at a pressure of 1.0 atm and temperature of 25 ∘C, was dissolved in 1
liraira [26]

Answer:

The Henry's law constant for argon is k=2.11*10^{-3}\frac{ M}{atm}

Explanation:

Henry's Law indicates that the solubility of a gas in a liquid at a certain temperature is proportional to the partial pressure of the gas on the liquid.

C = k*P

where C is the solubility, P the partial pressure and k is the Henry constant.

So, being the concentration C=\frac{ngas}{V}  

where ngas is the number of moles of gas and V is the volume of the solution, you must calculate the number of moles ngas. This is determined by 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 n=\frac{P*V}{R*T}

In this case:

  • P=PAr= 1 atm
  • V=VAr= 5.16*10⁻² L
  • R=0.082 \frac{atm*L}{mol*K}
  • T=25 °C=298 °K

Then:

n=\frac{1 atm*5.16*10^{-2} L}{0.082 \frac{atm*L}{mol*K} *298K}

Solving:

n= 2.11 *10⁻³ moles

So: C=\frac{ngas}{V}=\frac{2.11*10^{-3} moles}{1 L} =2.11*10^{-3} \frac{moles}{L}= 2.11*10^{-3} M

Using Henry's Law and being C=CAr and P =PAr:

2.11*10⁻³ M= k* 1 atm

Solving:

k=\frac{2.11*10^{-3} M}{1 atm}

You get:

k=2.11*10^{-3}\frac{ M}{atm}

<u><em>The Henry's law constant for argon is </em></u>k=2.11*10^{-3}\frac{ M}{atm}<u><em></em></u>

5 0
4 years ago
Which of these is a chemical property of iron?
denpristay [2]
Iron becomes rusted especially in damp air but never in a dry air,  this is one of the many unique characteristics of iron. Iron is also ductile and malleable. It is found in the seventh group of the periodic table. It has four different and unique crystalline forms and completely dissolves in dilute acids. The two chemical compounds that can be found or made from iron are the bivalent iron also known as ferrous and the trivalent iron or known as ferric compounds.
7 0
3 years ago
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Is the following item durable or nondurable? hamburger
joja [24]
This item is nondurable.
3 0
3 years ago
Increasing the temperature of gas in a container that cannot expand is a way to _______. decrease the volume of the gas decrease
alex41 [277]

Answer:

Increase the pressure of the gas

Explanation:

According to the Pressure law, for a fixed mass of gas, at a constant volume (V), the pressure (P) is directly proportional to the absolute temperature (T).

From the kinetic molecular theory, gases are composed of particles which are in constant motion, colliding with themselves as well as with the walls of their container.

When the temperature of these gas molecules is increased, the molecules acquire more kinetic energy and the rate of collisions increases. Since the container cannot expand, the increase in pressure is due to the increase in collisions between the molecules of the gas as well as with the walls of their container.

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3 years ago
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solmaris [256]
The shape of the H2O molecule is a Bent Triatomic.
It isn't symmetrical.
The H2O molecule is polar.
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