The equations describing these laws are special cases of the ideal gas law, PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of the gas, T is its kelvin temperature, and R is the ideal (universal) gas constant.
By rearranging the ideal gas law, P=n(RTV)=nconst, it can be demonstrated that the pressure of a sample of gas is directly proportional to the number of moles of gas present when volume and temperature are maintained constant. The common measurement of pressure is the pascal (Pa). The kilopascal is the most practical measure for measuring commonplace gas pressures since a pascal is a relatively tiny unit of pressure (kPa). There are 1000 pascals in a kilopascal. The atmosphere is yet another widely used pressure measurement unit (atm).
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if the temperature of a fixed amount of an ideal gas is increased, it necessarily follows that:______.
If the temperature of a fixed amount of an ideal gas is increased, it is necessary follow that pressure also increases.
For an ideal gas temperature is directly proportional to the pressure.
PV = nRT
so, When temperature increases, the particles will have a greater average kinetic energy and a greater average speed. Thus these particles collide with the walls of the container more frequently and forcefully. This leads to a greater pressure. This means that as the temperature decreases, the pressure also decreases, and as the temperature increases, the pressure increases. As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
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in order to study the structure of a crystalline solid, you want to illuminate it with em radiation whose wavelength is the same as the spacing of the atoms in the crystal (0.124 nm). what is the frequency of the em radiation?
The frequency of the electromagnetic radiation is 0.024 x 10^20 Hz
The wavelengths, frequencies, and energies at which each type of electromagnetic radiation is present are listed on the electromagnetic spectrum. Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays are the types of radiation that are listed on the electromagnetic spectrum.
Given wavelength λ = 0.124 nm = 0.124 x 10-9 m
frequency = c/λ = where c is speed of light = 3x10^8 m/s
f = 3x10^8 /0.124 x 10-9 = 0.024 x 10^20 Hz
Hence frequency of the em radiation is 0.024 x 10^20 Hz
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computational chemistry calculates physical and chemical properties of compounds based upon
Computational chemistry calculates physical and chemical properties of compounds based upon theory and observation.
Computational chemistry can be described as a modern branch of chemistry in which computer simulations are used to calculate and analyze the properties of a compound. Both the physical and chemical properties can be calculated by using computational chemistry.
Using computational chemistry, theories and observations are made about the properties of a compound. These theories and observations are checked for accuracy by calculating the physical and chemical properties under the branch of computational chemistry.
The question will correctly be written as:
Fill In the Blank
Computational chemistry calculates physical and chemical properties of compounds based upon ...........
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question 1 of 5 which two colors could you mix together to create a secondary color? a. red and green b. red and orange c. red and purple d. red and yellow
What is the name of the compound Os(NO3)2
Answer:
Beryllium nitrate
Explanation:
hope this helps
a sample of gas weighs 3.33 g and occupies a volume of 1.365 l at 95 °c and 790 torr. identify the gas sample.A. Cl₂ (molar mass-70.90 g/mol)B. NH (molar mass- 17.03 g/mol)C. N₂0 molar mass-44.02 g/mol)D. CHC, (molar mass-119.4 g/mol)E. SO₂ (molar mass - 64.07 g/mol)
The gas sample is Cl₂. Answer A.
The ideal gas equation formula PV = nRT
P = the gas pressure (atm)Calculating the number of moles of the gas sample.
PV = nRT
1.04 × 1.365 = n × 0.0821 × 368
1.4196 = n × 30.21
n = 1.4196 ÷ 30.21
n = 0.04699 mol
The formula for mass and number of moles m = n × Mr
m = the mass of the gas (grams)Calculating the molar gas from the sample
Mr = m ÷ n
Mr = 3.33 ÷ 0.04699
Mr = 70.9 g/mol
From the info given, gas Cl₂ has the same molar mass as the sample.
So, the gas sample is Cl₂, chlorine gas.
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The pressure of the top of a mountain is 98.9 kPa. What is this
pressure in atm?
The pressure of the top of a mountain is 0.976066847atm.
What is pressure?The force exerted on a surface per unit area. The units of pressure are as follows: bar, atm, Pascal, kilo Pascal, and torr. The Standard International unit of pressure is pascal ( Pa) which is equivalent to one newton per square meter (N/m² or kg m⁻¹s⁻²).
Pressure can be calculated using the formula:P = F/A
Where,
Pressure= P
F= Force
A = Area
Given in the question:P = 98.9 kPa
To calculate the pressure in atm, we have:1kPa = 0.00986923 atm
98.9 kPa = X atm
Cross multiplying we have:
X atm * 1kPa =98.9 kPa * 0.00986923 atm
making X atm subject of the formula:
X atm = 98.9 kPa * 0.00986923 atm
1kPa
X atm = 0.976066847atm.
Hence, The pressure of 98.9 kPa at the top of a mountain is 0.976066847atm.
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Select all the statements that correctly describe the arrangement of individual particles in the three physical states of matter. relate these particulate views to the observable properties of matter.
a. Gases occupy the entire volume of the container.
b. The particles in a gas move quite freely.
c. The particles in a solid occupy fixed positions.
d. Liquids take the shape of the container.
Gases occupy the entire volume of the container. The particles in a solid occupy fixed positions. Liquids take the shape of a container. The particles in a gas move quite freely.
Gases do occupy space even though their volume is very modest compared to the capacity of the container. This leaves the container's capacity totally open to the flow of gas molecules. A solid has a fixed shape and volume because the particles can only move very slightly. Despite their back-and-forth oscillations, the particles remain in their stable positions.
Liquids have a specific volume because the particles within them are still in close contact with one another. On the other hand, since its component particles are free to move around one another, a liquid lacks a set shape and adopts the shape of its container. In a gas, particles vibrate and move around freely.
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The complete question is:
select all the statements that correctly describe the arrangement of individual particles in the three physical states of matter. relate these particulate views to the observable properties of matter.
a. The particles in a solid occupy fixed positions.
b. Gases occupy the entire volume of the container.
c. The particles in a solid move quite freely.
d. Liquids have the same fixed arrangement of particles as observed in solids.
e. The particles in a gas move quite freely.
f. Liquids take the shape of a container.
show transcribed data consider two organic molecules, ethanol and benzene. one dissolves in water and the other does not. why? they have different molar masses. one is ionic, the other is not one is an electrolyte, the other is not. ethanol contains a polar o-h bond, and benzene does not.
Benzene lacks a polar O-H bond, but ethanol does. Benzene C6H6 with ethanol C2H6O.
Benzene fails the iodoform test, whereas ethanol does.
While ethanol burns with a non-luminous flame, benzene produces a sooty flame.
Iodoform testing shows that ethanol passes whereas benzene does not.
In contrast to benzene, which generates a sooty flame, ethanol burns with a non-luminous flame.
Water does not mix with benzene, but organic solvents do.
It is a colorless liquid with a pleasant scent.
Benzene has a high melting point and a moderate boiling point.
It burns with a sooty flame and is quite flammable.
A clear, colorless liquid, ethanol has a distinct flavor of burning with a nice aroma. It has high flammability. Ethanol combines easily with water and a variety of organic liquids and is used to dissolve other chemical compounds.
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complete the following sentence correctly. the membrane of a neuron contains many more __________ leak channels than __________ leak channels, and this causes the resting membrane potential to be somewhat near to the equilibrium potential for __________.
The cell possesses potassium and sodium leakage channels that allow the two cations to diffuse down their concentration gradient. However, the neurons have far more potassium leakage channels than sodium leakage channels.
What are leak channels in neurons?
Non-gated channels are ion channels that are always open. Another common name for these channels is “leak” channels, because they simply allow ions to pass through the channel without any impedance.
What are Na and K leak channels?
Sodium leak channels further enhancing the influx of sodium ions, while potassium leak channels allow potassium ions to diffuse out of the cell. It doesn't matter if the neuron is at the resting membrane potential, depolarizing, repolarizing, or hyperpolarizing; the leak channels are always open.
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Which best describes solubility?the speed at which a substance dissolvesthe ability of one substance to dissolve in anotherthe amount of surface area per a given massthe temperature at which subtances become a mixture.
The best describes solubility is the correct option is : the ability of one substance to dissolve in another substance.
The solubility of the substances is the ability of the substance to dissolves in the another substance. it can be defined as the maximum amount of the substance that can be dissolves in the given amount of the solvent at certain temperature. the factors that affect the solubility of the substance are given as follows :
polarityconcentration of solutetemperaturepressuremolecule sizeThus, the solubility of the substance is its maximum amount that can be dissolved in a specified amount of the solvent.
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Does bromine react with graphite?
what is the volume of an object that is put into a graduated cylinder that initially has 10.0ml of water and then goes up to 14.3ml of water when the object is put in the graduated cylinder.
The volume of an object that is put into a graduated cylinder that initially has 10.0ml of water and then goes up to 14.3ml of water when the object is put in the graduated cylinder is 4.3 mL.
What is the volume of the object?The volume of an object is the amount of space that object takes up.
The volume of the object placed in the graduated cylinder containing water is calculated as follows;
The volume of the object = Final volume of water in the cylinder - Initial volume of water in the cylinder
The volume of the object = 14.3 mL - 10.0 mL
Volume of the object = 4.3 mL
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The molar mass of hf is 20. 01 g/mol. How many moles of sn are required to react completely with 40 g of hf? 1 mole 2 moles 3 moles 4 moles.
The molar mass of HF is 20. 01 g/mol, (a) 1 mole of Sn is required to react completely with 40 g of HF.
Molar mass of HF = 20. 01 g/mol
Mass of HF = 40 g
Number of moles of Sn = ?
Write the balanced chemical equation
Sn + 2HF → SnF₂ + H₂
one mole of Sn is required to react with two moles of HF
Find number of moles of HF
number of moles = mass / molar mass
number of moles of HF = 40 g / 20. 01
number of moles of HF = 2.0 moles
As the molar ratio of Sn and HF 1 : 2
There are 2 moles of HF, and from the molar ratio, it is clear that the number of moles of Sn is half of HF.
So the number of moles of Sn = 2 × 1/2
number of moles of Sn = 1 mol
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how many grams of kno3 are needed to make 250. ml of a solution that is 0.135 m? question 11 options: a) 6.82 g b) 1.71 g c) 3.41 g d) 0.341 g
3.41 grams of KNO3 are needed to make 250. ml of solution.
Using the formula of molarity,
M= n/v
M = molar concentration
n = moles of solute
v = liters of solution
The mass of KNO3 is = 0.135 mol / 1L x 1L / 1000ml x 250 ml / 1L x 101.10 g / 1 mol
= 3.41
The mass of KNO3 is 3.41 grams
Molarity or molar concentration is the number of moles of solute per liter of solution.
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.
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Every second, the Sun converts about 600 million tons of hydrogen into 596 million tons of helium. The remaining 4 million tons of mass is _________.
converted to an amount of energy equal to 4 million tons times the speed of light squared
ejected into space in a solar wind
reabsorbed as molecular hydrogen
ejected into space by solar flares
Propelled into space as a solar wind with a total energy of 4 million tons times the speed of light squared.
The 4 million tons of mass are transformed into an energy equivalent to 4 million tons times the square of the speed of light. Solar winds help this energy from the sun move as it is taken up by the planets in the solar system. We can argue that the mass is turned into energy that moves in discrete packets as radiation because there is no propagation medium for this solar energy, which is why it appears to be moving as solar radiation
.Each second, it produces 596 million tons of helium by fusing roughly 600 million tons of hydrogen. The Sun shines because the remaining four million tons of hydrogen are transformed to energy.
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what mass of the isotope will remain after 5.7 days? (assume no excretion of the nuclide from the body.)
The mass of the isotope will remain after 5.7 days is 0.69 gm.
What is isotope?
Isotopes are atoms that have variable numbers of neutrons but the same number of protons. They differ in mass and hence in physical qualities, although having nearly identical chemical properties.
What is mass?
Grammes can be used to measure lower quantities instead of kilogrammes, which is the standard SI unit for mass (g). A balance would be used to quantify mass.
t1/2 = 4 days , k = 0.693/t1/2 = 0.693/4 = 0.17325
t = 5.7 days
t = ( 1/k) ln(a/a-x)
5.7 = (1/0.17325) ln ( 1.85/1.85-x)
2.684582 ( 1.85-x) = 1.85
x = 1.161
amount left or remained = a-x = 1.85-1.161 = 0.689 gm = 0.69 gm
Therefore, the mass of the isotope will remain after 5.7 days is 0.69 gm.
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a liter of cold water will warm faster in sunlight in a group of answer choices silver-colored pot. black-colored pot. red-colored pot.
If the pot is exposed to light such as the sun then the black pot will heat slightly faster.
What is heat?
With the increase in a body’s temperature, molecules or atoms’ vibrations growth. These vibrations are then transferred from one part of the body to some other. The measure of power with which the molecules vibrate in a gadget is called as warmness stored in that object.As in line with the definition of heat, it's far defined as the drift of power from a warm to a cooler object. The route of waft of the heat strength takes from the substance of better temperature to the substance of lower temperature. This is because the molecules are vibrating faster and transfer their power to the molecules vibrating slower.The vibrational electricity is likewise termed as its warmness content.To know more about heat, click the link given below:
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pf6− does not obey the octet rule. draw its lewis structure and state the type of octet-rule exception. indicate the values of nonzero formal charges. be sure to include lone pair electrons on all atoms.
PF₆⁻ does not obey the octet rule due to the electron deficiency is present in PF₆⁻.
Why PF₆ Not obey octet rule?In the PF₆⁻ molecule P not follows the octet here, it expands its valency and violates the octet. From the octet calculation, it requires 56 electrons but the valence electrons are 48, so the remaining 8 electrons are accumulated by 8/2 = 4 bonds, but here P makes six bonds which is a violation of octet.
What is formal charge ?To find formal charges in a Lewis structure, for each atom, you should count how many electrons it "owns". Count all of its lone pair electrons, and half of its bonding electrons. The difference between the atom's number of valence electrons and the number it owns is the formal charge.
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2. Scientists learn this from fossils EXCEPT:
O How old the organism could be
O the climate of the area from the time
O What future fossils will look like
O the structure of the creature
All fossils can teach scientists something, but What fossils of the future will look like. They can discover information on the structure of the organism, its age potential, and the local climate.
What distinguishes an organic structure from an inorganic one?The main distinction between these inorganic compounds molecules is that organic molecules always contain an atom of carbon, whereas the majority of inorganic compounds do not. A simple C-H bond or carbon-hydrogen are present in almost all organic molecules.
What elements make up an organic structure?The primary ingredients of the majority of organic compounds are four elements: hydrogen, carbon, oxygen, and nitrogen.
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reagent test strip pads for ketones primarily measure a. acetone b. acetoacetic acid c. cholesterol d. beta-hydroxybutyric acid
The correct answer is Option b
b. acetoacetic acid
What is Acetoacetic acid ?
A butyric acid with a 3-oxo group, acetoacetic acid is a 3-oxo monocarboxylic acid. As a metabolite, it serves a purpose. It is a 3-oxo fatty acid and a ketone substance. It is comparable to a butyric acid in terms of function. It is an acetoacetate's conjugate acid. It is a 3-hydroxy-3-butenoic acid tautomer.
Also known as diacetic acid, this unstable acid C4H6O3 is one of the ketone bodies that can appear in abnormally high concentrations in the blood and urine under certain metabolically compromised situations, such as those associated with famine and diabetes mellitus.
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what does it mean to say that an enzyme-catalyzed reaction is either enzyme-limited or substrate-limited?
Nothing changes; it stays the same.
What does it imply to claim that a reaction is being catalysed by an enzyme?
Enzymatic catalysis of a reaction involving two substrates. The two substrates are brought together in the correct direction and location to react with one another using the template provided by the enzyme.
How do enzymes decide what to eat for fuel?
Finding the peptide sequences that proteases cleave in vitro—or, more specifically, which amino acids span the cleavage site and are recognised by the enzyme's active site—is one method of identifying prospective protease substrates. The proteome is then searched for substrates using these sequences, much like partial licence plate numbers
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mg(oh)2, also known as milk of magnesia, is sometimes used as an antacid. determine the volume of stomach acid (2.90 m hcl) in milliliters that can be neutralized by a 25.0 g mg(oh)2 tablet.
Mg(oh)2, also known as milk of magnesia, is sometimes used as an antacid. The volume of stomach acid (2.90 m Hcl) in milliliters that can be neutralized by a 25.0 g mg(oh)2 tablet is 0.07 .
The key here is to remember that 1 mole of magnesium hydroxide requires 2 moles of hydrochloric acid to neutralise it.
Mg (OH)2 (s) + 2 HCl (aq) MgCl2 (aq) + 2 H2O (l)
You can state that your sample has 0.10 moles of hydrochloric acid because you are aware that 1 L = 103 mL of the hydrochloric acid solution contains 0.10 moles of hydrochloric acid.
25 mL, 0.10 moles HCl/10 mL = 0.0025 moles HCl
This implies that a full neutralisation will call for
1 mole Mg = 0.0025 moles HCl (OH)
Mg(OH)2 = 0.00125 moles per 2moles of HCl.
Lastly, utilise the compound's molar mass to convert this to grammes.
58.32 g for 0.00125 moles Mg(OH)2 and 0.07 g for moles of Mg(OH)2
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A solid being added to a liquid to make a mixture. What is the name of this process?.
The process of adding a solid to a liquid to make a mixture is called Dispersion. The mixture can be a solution or a suspension.
For the mixture to be totally in a state of equilibrium, the mixture has to be a solution, which means that the solid particles have fully dissolved in the liquid, otherwise known as a solvent.
Dispersions could result in different mixtures which are named according to how they appear. An example is a suspension, which appears to be partly dissolved in the liquid to form a semi-solid mixture.
Dispersions could also result in emulsions and colloids, all of which have large particles and are non-crystalline in nature.
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What will happen to the value of emf of the cell Zn Zn2+ 0.1 M cu2+ 0.1 m )/ Cu if the concentration of the electrolyte in the anode compartment is increased?
If the concentration of the electrolyte in Zn2+ is increased, emf of the cell will decrease.
A medium that contains ions and conducts electricity due to the movement of those ions but not due to the movement of electrons is called an electrolyte. Most soluble salts, acids, and bases that have been dissolved in a polar solvent, like water, fall under this category. The material divides into cations and anions during the dissolution process, and both are evenly distributed throughout the solvent. Electrolytes in solid state are also a thing. The term electrolyte in medicine and occasionally in chemistry refers to the substance that is dissolved.
Such a mixture has no electrical charge. When an electric potential is introduced to such a solution, the anions are pulled to the electrode with a shortage of electrons while the cations are drawn to the electrode with an abundance of electrons.
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The tank is heated until the pressure of the gas in the tank doubles. What is the temperature of the gas?.
The temperature of the gas will be 800k.
The initial temperature of the ideal gas in the tank is: T1 =400 K
The initial pressure of ideal gas in the tank is: P1 = 1 atm
The final pressure of the ideal gas is: P2 = 2 atm
To get the temperature T2, we must apply the equation and concepts from the ideal gas law.
It may be described mathematically as :
PV = nRT
where,
P = Pressure
V = Volume
n = Number of moles
R = Gas constant
T = Temperature
When the number of moles and volume remains constant, the expression can be written as:
P1/T1 = P2/T2
T2 = (P2×T1) / P1
On putting the given values, we get:
T2 = 2 × 400 / 1
T2 = 800 / 1
T2 = 800K
Therefore, the temperature of the gas will be 800K.
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Even though your question is incomplete, I've believed that you were referring to this specific question:
➤A tank is filled with an ideal gas at 400 K and a pressure of 1.00 atm. The tank is heated until the pressure of the gas in the tank doubles. What is the temperature of the gas?
please answer this for me do not copy off others please and ty
g which of the following is a physical property?question 4 options:ozone reacts with silver to give silver oxidesulfur burns in oxygen to form sulfur trioxidethe density of leadplatinum metal does not react with hydrochloric acid
The following shows the physical property,
A) ozone reacts with silver to give silver oxide
B) platinum metal does not react with hydrochloric acid.
How do chemical reactions occur?
In a chemical reaction, reactants undergo a chemical reaction and transform into products through a chemical process.
Since silver has no charge and is not linked to any other atoms, its oxidation state would be zero. Silver oxide is formed when ozone and silver combine. This reaction can be expressed as follows.2Ag+O3→Ag2O+O2When metals and acids react, hydrogen gas is released. Noble metals include gold (Au) and platinum (Pt). These metals are naturally non-reactive and have no reaction with hydrochloric acid.Therefore, the following shows the physical property,
A) ozone reacts with silver to give silver oxide
B) platinum metal does not react with hydrochloric acid.
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a triacylglycerol is reacted with water and a strong acid to yield glycerol and three fatty acid molecules. identify the reaction type.
The process you described, known as hydrolysis, produces three fatty acid molecules and glycerol when a triacylglycerol (a form of fat) combines with water and a strong acid.
Thus, In a chemical reaction known as hydrolysis, a chemical bond is broken by the presence of water.
When it comes to triacylglycerols, the ester bonds between the fatty acid chains and the glycerol molecule are broken, causing the creation of glycerol and the release of three fatty acid molecules. Strong acids are frequently used to catalyze this reaction, which speeds up the hydrolysis process.
Triacylglycerol hydrolysis is a crucial step in the digestion and metabolism of lipids in living things because it enables the breakdown of ingested fats into smaller, more manageable molecules.
Thus, The process you described, known as hydrolysis, produces three fatty acid molecules and glycerol when a triacylglycerol (a form of fat) combines with water and a strong acid.
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In the past 150 years, co2 emissions have risen by nearly 50%. what has dramatically increased during this time that has led to this increase in CO2?
Carbon dioxide (CO2) concentrations have increased from 280 to about 380 parts per million during the past 150 years (ppm). the reality that human activity is mostly to blame for this.
what is carbon dioxide?
One carbon atom is covalently doubly linked to two oxygen atoms to produce the chemical substance known as carbon dioxide, with the formula CO2. When the temperature is ambient, it exists as a gas. Although it is invisible to visible light when present in the air, carbon dioxide acts as a greenhouse gas by absorbing infrared radiation.
Looking at historical records of human activity reveals that human activity is the cause of the elevated CO2 levels. Since the industrial revolution, we have used fossil fuels and cleared and burned forest area at a rate that has never been seen before, which turns organic carbon into CO2. A careful analysis of the amount of fossil fuel that has been taken and burned, as well as the amount of land cleared, reveals that we have produced significantly more CO2 than is currently found in the atmosphere.
Our estimated 500 billion metric tons of carbon emissions are sufficient to have increased the atmospheric CO2 concentration to just around 500 parts per million.
Since part of the CO2, we produce can be absorbed by the ocean and terrestrial biosphere, the concentrations have not yet reached that level. The apparent increase is, however, explained by the fact that we produce CO2 more quickly than the ocean and biosphere can absorb it.
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