what are 2 physical changes in the carbon cycle?
Answers
Answer:
Today, the carbon cycle is changing. humans are moving more carbon into the atmosphere from other part of the earth system. more carbon is moving to the atmosphere where fossil fuels, like coal and oil, are burned.more carbon is moving to the atmosphere as you may get rid of forest by burning the tree
Explanation:
hope this give you a hint
Related Questions
PLEASE HELP ASAP!!!
What is the mass of the element above?
-1
-2
-3
-4
-5
Answers
Answer:
its 1 not negative
the atom shown below was hydrogen, known as H.
The heat to drive Earth's convection cells comes from...
A. the Earth's crust.
B. the Earth's mantle.
C. the Earth's core.
D. the sun.
Answers
Answer:
the sun im not 100% sure but yes
Answer:
B. The Mantle
Explanation:
The mantle is the part of the earth that has convection currents.
Present in a state where it molecules are far apart during a change of state it's molecules slow down which change of state has most likely taken place from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma
Answers
Answer:
The change of state that has occurred is from a gas to a liquid
Note: The question is incomplete. The complete question is given blow.
H₂O is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?
from a gas to a liquid
from a liquid to a gas
from a solid to a liquid
from a gas to a plasma
Explanation:
Water can exists in three states: as gaseous water vapor, as liquid water, and as solid ice. Each of these states of water can be interconverted from one to another by the addition or removal of heat in a process known as change of state.
Liquid water can be converted to solid ice by the removal of heat, while solid ice ice can be converted to liquid water by the addition of heat. Also, liquid water can be converted to water vapor by the addition of heat, while water vapor can be converted to liquid water by the removal of heat.
Of the three states of water, the one in which the molecules are farthest apart is in the gaseous state. The molecules have high kinetic energy and move randomly while colliding with one another. When a heat is removed from these highly energetic molecules, the molecules slow down and lose some of their kinetic energy and a change of occurs from gaseous to liquid state.
Therefore, the change of state that occurred as described, is from gas to liquid.
When you have added as much solute as can dissolve in solvent the solution is called
Answers
Solubility limit. that's the answer
Seleccione una actividad humana y el impacto generado debe realizar un resumen sobre la actividad seleccionada y dos medidas de prevención para evitar la alteración de los ciclos.
Answers
Answer:
Industrial activity increases the emission of greenhouse gases in the atmosphere, especially carbon dioxide (CO2), and it negatively affects climate by increasing global warming.
Two actions to face the global warming:
1- To substitute the use of fossil fuels by alternative clean energy sources such as, for example, hydroelectric, geothermal, solar and wind energy resources.
2- The government's policies decided to develop electric cars and to stimulate healthy habits such as walking instead of the use of conventional fossil-fueled transport modes.
A 1.00-L flask is filled with 1.00 moles of H2 and 2.00 moles of I2. The value of the equilibrium constant for the reaction of hydrogen and iodine reacting to form hydrogen iodide is 50.5 under the given conditions. What are the equilibrium concentrations of H2 , I2 , and HI in moles/L? H2 (g) + I2 (g) ⇌ 2HI(g)
Answers
Answer:
\( C_{H_{2}} = 0.07 M \)
\( C_{I_{2}} = 1.07 M \)
\( C_{HI} = 1.86 M \)
Explanation:
The reaction is:
H₂(g) + I₂(g) ⇄ 2HI(g)
Initially, we have the following concentrations of H₂ and I₂:
\( C_{H_{2}} = \frac{n}{V} = \frac{1 mol}{1.00 L} = 1 mol/L \)
\( C_{I_{2}} = \frac{n}{V} = \frac{2 mol}{1.00 L} = 2 mol/L \)
Then, in the equilibrium we have:
H₂(g) + I₂(g) ⇄ 2HI(g)
1-x 2-x 2x
\( Kc = \frac{[HI]^{2}}{[H_{2}][I_{2}]} = \frac{(2x)^{2}}{(1-x)(2-x)} \)
\( 50.5*(1-x)(2-x) - (2x)^{2} = 0 \)
By solving the above equation for x we have:
x₁ = 2.32 and x₂= 0.93
Hence, the concentrations of H₂, I₂ and HI are:
\( C_{H_{2}} = 1-x = 1 - 0.93 M = 0.07 M \)
\( C_{I_{2}} = 2-x = 2 - 0.93 M = 1.07 M \)
\( C_{HI} = 2*x = 2*0.93 M = 1.86 M \)
I hope it helps you!
who earned the nobel prize twice for their work with radioactivity
Answers
Answer:
Marie Curie, née Maria Salomea Skłodowska, (born November 7, 1867, Warsaw, Congress Kingdom of Poland, Russian Empire—died July 4, 1934, near Sallanches, France), Polish-born French physicist, famous for her work on radioactivity and twice a winner of the Nobel Prize.
Explanation:
pls give brainlest almost lvled up.
Answer:
Marie Curie is the one who earned the nobel prize twice for her work with radioactivity
In the Haber Process, ammonia is synthesized from nitrogen andhydrogen:
N2 (g) + 3H2 -----> 2NH3(g)
ΔG at 298K for this reaction is -33.3 kj/mol. the valuef ΔG at 298 K for a reaction mixture that consists of 1.9 atmN2, 1.6 atm H2 and 0.65 atm NH3 is________.
a.) -3.86 x 103
b.) -1.8
c.) -7.25 x 103
d.) -40.5
e.) -104.5
Answers
The value of ΔG at 298 K for a reaction mixture containing 1.9 atm N2, 1.6 atm H2, and 0.65 atm, the answer is (a) -3.86 × 10^3.
NH3 can be calculated using the equation:
ΔG = ΔG° + RT ln(Q)
where ΔG is the standard Gibbs free energy change, ΔG° is the standard Gibbs free energy change at standard conditions, R is the gas constant, T is the temperature in Kelvin, and Q is the reaction quotient.
In this case, we are given ΔG° as -33.3 kJ/mol. To calculate Q, we need to use the partial pressures of the gases in the reaction mixture. The reaction stoichiometry tells us that the ratio of the partial pressures of N2, H2, and NH3 is 1:3:2. Therefore, we can write:
Q = (P(NH3))^2 / (P(N2) * P(H2)^3)
Plugging in the given values of P(N2) = 1.9 atm, P(H2) = 1.6 atm, and P(NH3) = 0.65 atm, we can calculate Q. Then, using the value of R = 8.314 J/(mol·K) and the temperature T = 298 K, we can substitute these values into the equation and solve for ΔG.
The calculated value of ΔG at 298 K for the given reaction mixture is approximately -3.86 × 10^3 J/mol. This value is equivalent to -3.86 kJ/mol. Therefore, the answer is (a) -3.86 × 10^3.
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density ________ as temperature ________ because the molecules lose energy and slow down, so the same number of molecules occupy less space.
Answers
This increased energy causes the molecules to move more rapidly, which in turn increases the volume of the substance. As the volume of the substance increases, its density decreases because the same amount of matter is spread out over a larger volume.
The density decreases as the temperature increases because the molecules lose energy and slow down, so the same number of molecules occupy less space. This happens because the increase in temperature causes the molecules to move more rapidly, increasing the space between them. The density of a substance is defined as its mass per unit volume. The density of a substance depends on its temperature, as well as its pressure and composition. As the temperature of a substance increases, the kinetic energy of its molecules also increases. This increased energy causes the molecules to move more rapidly, which in turn increases the volume of the substance. As the volume of the substance increases, its density decreases because the same amount of matter is spread out over a larger volume.
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A car's catalytic converter combines carbon monoxide, a poisonous gas, with oxygen to form carbon dioxide gas. A balanced equation indicates the mole ratios of reactants and products. If all the reactants and products are gases, then the equation can also be read in terms of volume ratios.
1. Write the balanced equation for this reaction.
2. What volume of oxygen is required so that 630 mL of carbon monoxide gas is completely converted to carbon dioxide?
3. How many liters of carbon dioxide are produced if the catalvtic converter processes 6.25 L of carbon monoxide?
4. How much oxygen does a catalytic converter require to produce 2.50 L of carbon dioxide?
5. Assume that 425 mL of carbon monoxide and 180mL of oxygen are being processed by a catalytic
Converter. Will all of the carbon monoxide be converted to carbon dioxide? Explain your answer
Answers
1) The balanced reaction is \(2CO + O_{2} ---- > 2CO_{2}\)
2) 313.6 mL is required so that 630 mL of carbon monoxide gas is completely converted to carbon dioxide.
3) 3.136 L are produced if the catalytic converter processes 6.25 L of carbon monoxide.
4) The volume of oxygen is 1.23L.
What is the balanced reaction?If 1 mole of CO occupies 22400 mL
x moles of CO occupies 630 mL
x = 0.028 moles
If 2 moles of CO reacts with 1 mole of oxygen
0.028 moles of CO reacts with 0.028 moles * 1/2
= 0.014 moles
Volume of oxygen required = 0.014 moles * 22400 mL
= 313.6 mL
If 1 mole of CO occupies 22.4 L
x moles of CO occupies 6.25 L
x = 0.28 moles
If 2 moles of CO produces 1 mole of carbon dioxide
0.28 moles of CO produces 0.28 * 1/2
= 0.14 moles
Volume of the carbon dioxide = 0.14 moles * 22.4 L
= 3.136 L
If 1 mole of carbon dioxide occupies 22.4 L
x moles of carbon dioxide occupies 2.5 L
x = 2.5 L * 1/22.4 L
x = 0.11 moles
If 1 mole of oxygen produces 2 moles of carbon dioxide
x moles of oxygen produces 0.11 moles of carbon dioxide
x = 0.055 moles
Volume of oxygen = 0.055 moles * 22.4 L
= 1.23L
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The table below lists the properties of a metallic element. Shiny, Silver colored, Forms +1 and +2 ions, compound with sulfur is bright red. Where on the periodic table would this element most likely be found?
Group 1
Group 2
Group 12
Group 13
Answers
Answer:
The correct option is;
Group 12
Explanation:
A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and which forms a bright red compound with sulfur is mercury, Hg
The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.
Answer:
12
Explanation:
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2
What are the reactants and products also add why
MARKING BRAINLIEST
Answers
Choose the products that complete the reaction. The chemical equation may not be balanced.
NaHCO3 + HC2H3O2
Answer: NaC2H3O2 + CO2 + H2O
Do you or anyone you know follow more than one calendar system? Which ones?
Answers
Some people do follow more than one calendar system to know some particular days, month or something based on their rituals and religions.
What is world accepted calendar system ?The world accepted calendar system is Christian calendar. There are different calendar systems in use in the present era such as Chinese calendar, Ethiopian calendar, Jewish calendar etc.
Each calendars have their own peculiarities in use and in the determination of days, months or the identifying any special day. There are some people using more than one calendar system.
For example, some are using religious calendars such as 'hijra ', 'Saka Varsha ' etc. to know some special days based on their cultural rituals.
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the ka for hydrofluric acid is 7.2 x 10-4. this means that hf is
Answers
a weak acid. The Ka (acid dissociation constant) is a measure of the strength of an hydrofluoric acid in solution. It is defined as the equilibrium constant for the dissociation reaction of the acid in water,.
which is usually written as:
HA + H2O → H3O+ + A-
A lower Ka value indicates that the acid is a weak acid, meaning that it does not dissociate very well in water and thus has a low concentration of H3O+ ions. A higher Ka value indicates that the hydrofluoric acid is a strong acid, meaning that it dissociates very well in water and thus has a high concentration of H3O+ ions. Given that the Ka for hydrofluoric acid is 7.2 x 10-4, this means that hydrofluoric acid is a weak acid. This means that it does not dissociate very well in water and thus has a low concentration of H3O+ ions. It is a weaker acid than the strong acids like Hydrochloric acid, Sulfuric acid, Nitric acid and many others.
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why are protons (h+) pumped across the inner mitochondrial membrane?
Answers
Protons (H⁺) are pumped across the inner mitochondrial membrane as part of the process called electron transport chain, which is an essential step in cellular respiration.
The electron transport chain is responsible for generating adenosine triphosphate (ATP), the main energy currency of cells.
During cellular respiration, electrons are transferred from high-energy molecules (such as glucose) through a series of electron carriers embedded in the inner mitochondrial membrane. As electrons pass through the electron transport chain, energy is released and used to pump protons (H⁺) from the mitochondrial matrix to the intermembrane space.
There are some several reasons;
Establishing an Electrochemical Gradient; The pumping of protons across the inner mitochondrial membrane creates an imbalance of protons, resulting in a higher concentration of protons in the intermembrane space compared to the matrix.
Generation of ATP; The electrochemical gradient created by the proton pumping is utilized by ATP synthase, an enzyme complex embedded in the inner mitochondrial membrane.
Coupling Electron Transport with Proton Pumping; The pumping of protons across the inner mitochondrial membrane is coupled with the flow of electrons through the electron transport chain.
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write the full electron configuration for lead (pb)
Answers
Surely, I will help you to write the full electron configuration for lead (pb).The atomic number of lead (Pb) is 82. The electron configuration of lead (Pb) is: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p².
Where the configuration tells us that Pb has four quantum numbers. The first quantum number is the principal quantum number (n) which is six (6) in this case since the 6th electron shell is where the Pb's last electron resides.
The second quantum number is the angular momentum quantum number (ℓ) which is zero (0) for s orbitals, one (1) for p orbitals, two (2) for d orbitals, and so on. For lead, the highest ℓ value is f, which is equal to 3.
The magnetic quantum number (m) determines the orientation of the electron's orbital around the nucleus, and it can range from -ℓ to +ℓ.
The spin quantum number (s) indicates the electron's spin, which can be either +1/2 or -1/2.
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Plz help on question 4
Answers
You know thy vegetable oils is going to be at the top because it is the lightest. So, there are really only two possible choices; a or b. B is incorrect because water and soap have the same volume, but soap has a larger mass meaning it would be beneath the water. Therefore, the correct answer is A.) corn syrup, dish soap, water, vegetable oil. Hope this helps!
Which statement best describes how temperature, humidity, and pressure vary within an air mass?
Answers
The boiling points of diatomic halogens are compared in the table.
Boiling Points of Diatomic
Halogens
Molecule
Boiling Point
F2
-188 °C
Cl2
-34 °C
Br2
59 °C
12
184°C
Which of the following statements best explains the trends in boiling points?
The atomic size increases down the group, and this decreases the strength of the intermolecular forces.
The total number of electrons decreases down the group, and this decreases the strength of the intermolecular forces.
The total number of electrons increases down the group, and this increases the strength of the intermolecular forces.
The chances of forming a permanent dipole increases down the group, and this increases the strength of the intermolecular forces.
Answers
Which of the following statements best explains the trends in boiling points?
A. The atomic size increases down the group, and this decreases the strength of the intermolecular forces.
A is incorrect
B. The total number of electrons decreases down the group, and this decreases the strength of the intermolecular forces.
B is incorrect
C. The total number of electrons increases down the group, and this increases the strength of the intermolecular forces.
C is correct
D. The chances of forming a permanent dipole increases down the group, and this increases the strength of the intermolecular forces.
D is incorrect
The boiling point increase down a group because the total number of electrons increases down the group, and this increases the strength of the intermolecular forces. Hence option C is correct.
What is boiling point?Boiling point of a substance is the temperature at which the substance changes from its liquid state to vapour state. Boiling point of a molecule or compounds depends on the bond type, molecular weight, temperature and pressure.
For ionic compounds, boiling point will be higher since ionic bonds are stronger than covalent compounds. There is a periodic trend for the physical properties such as boiling point for elements in periodic table.
Down a group, the number of electrons increases and the atomic size also as well as the ionic character increases down a group . These two facts leads to higher intermolecular attraction, thus more temperature have to applied to weaken the bonds.
Higher temperature to be applied means the boiling point of the substance is higher. Therefore, boiling point down a group increases because of the higher intermolecular attraction as said in option C.
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Please answer question 2.
1. What happens when you stir a spoonful of sugar into hot water?
2. When sugar or another substance is dissolved in water, it disappears from view and forms a homogeneous mixture with the water, also called a solution.
If you can’t see the sugar, how can you tell that it is there?
Answers
Answer:
The water tastes sweet, and it usually appears to be cloudy or not clear.
Explanation:
If nothing dissolves into the water, then it should be clear.
Answer:You can tell if the sugar is still there by boiling off the water and leaving the sugar behind in the container. Sugar is a solid, and therefore cannot evaporate, so when the water reaches boiling point, it will evaporate at a quicker rate than before (water evaporates at any temperature in liquid form; just not enough to be noticeable) and leave the container to become water vapour
Explanation: If you stir a spoonful of sugar into hot water, the sugar will dissolve in the hot water. When sugar or another substance is dissolved in water, it disappears from view and forms a homogeneous mixture with the water, also called a solution.
if you start with 5.5 grams of sodium fluoride how many grams of magnesium fluoride will be produced
Answers
From 5.5 grammes of sodium fluoride, 4.1 grammes of magnesium fluoride will be created. The inorganic substance MgF2 stands for magnesium fluoride.
It naturally occurs as the rare mineral sellaite and is a white crystalline salt that is transparent over a broad range of wavelengths and has commercial use in optics used in space telescopes. With the formula NaF, sodium fluoride (NaF) is an inorganic substance. It is utilised in minute quantities in toothpaste, metallurgy, and as a flux in addition to fluoridating drinking water. It is a white or colourless substance that easily dissolves in water. Pharmaceutical manufacturers frequently use it as a source of fluoride. Mass in grammes is equal to 0.06548 times 62.301 grammes of MgF2.
= 0.06548 /62.301 = 4.1grams
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How can air pollutants such as sulfur dioxide, carbon dioxide, and nitrogen oxide lead to chemical weathering
Answers
Corrosive downpour results when sulfur dioxide and nitrogen oxides are radiated into the environment and moved by wind and air flows. Sulfuric and nitric acids are produced when sulfur dioxide and nitrogen dioxide combine with water, oxygen, and other substances
Additionally, it may increase the risk of heart and lung conditions and aid in the development of respiratory illnesses. Coal and oil combustion produce sulfur dioxide. It is rotten. Power plants are the primary sources of sulfur dioxide. Nitrogen dioxide comes from the consumption of non-renewable energy sources like gas.
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156. A solid metal sphere has a volume of 4.2 ft}. The mass
of the sphere is 155 lb. Find the density of the metal
sphere in grams per cubic centimeter.
Answers
Answer:
The answer is
0.59 g/cm³Explanation:
To find the density of the sphere we use the formula
\(Density \: = \frac{mass}{volume} \)To find the density in g/cm³ first convert the mass into grams and the volume into cm³
For the mass we have
155 lb = 70306.82 g
For the volume
4.2 ft³ = 118930.76 cm³
Substitute the values into the above formula
That's
\(Density \: = \frac{70306.82 \: g}{118930.76 \: cm³} \)We have the final answer as
Density = 0.59 g/cm³Hope this helps you
why is it important not to dilute the initial sample before it has been loaded
Answers
Chromatography column in order to minimize the matrix effect and prevent detector saturation.
Why is using a little amount of solvent critical when loading a sample into a column of chromatography?It is imperative that you just use a few drops of solvent to load the sample in this situation if you choose to load the column wet. If you utilize too much solvent, the loading solvent will obstruct the elution and, as a result, the mixture's separation.
What impact does dilution have?Dilution has the following effects: I As a solution is diluted, its conductivity rises. When diluted, the specific conductivity drops (as the number of ions decreases w.r.t. to volume). With dilution, the equivalent and molar conductivities rise.
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plzzz help and thank u
Answers
Answer:
sports reporter
Explanation:
wnba
80 calories must be lost to make water change into ice at 0° C. True False
Answers
How many valence electrons are in an atom of each element in group 17 in the periodic table?.
Answers
There are seven valence electrons present in an atom of each element in group 17 of the periodic table.
Valence electrons are the electrons present in the outermost shell of an atom that are involved in chemical reactions. The number of valence electrons an atom has depends on its group number in the periodic table.Elements in group 17 are known as the halogens. They include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). These elements all have seven electrons in their outermost shell, making them have seven valence electrons. This means that they are one electron short of having a full outer shell of eight electrons, which is the ideal electron configuration known as the octet rule.
The valence electrons in an atom of group 17 elements are responsible for their reactivity. They tend to form ionic bonds with metals to achieve a full outer shell, resulting in the formation of compounds known as halides. For example, chlorine can form an ionic bond with sodium to create sodium chloride (NaCl), which is table salt.
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Question is in photo! Will give BRAINLIEST to whoever answers correctly first!
Answers
Answer:
B. Three different Isotopes
Explanation:
Hydrogen : 1 p and 1 e, as in all images, neutrons just differ
2FeO(s) ⇌ 2Fe(s) + O2(g) K eq = 1 x 10^-6 at 1000 K
CO2(g) ⇌ C(s) + O2(g) K eq = 1 x 10^-32 at 1000 K
The formation of Fe(s) and O2(g) from FeO(s) is not thermodynamically favorable at room temperature. In an effort to make the process favorable, C(s) is added to the FeO(s) at elevated temperatures. Based on the information above, which of the following gives the value of K eq and the sign of ΔG° for the reaction represented by the equation below at 1000K?
2FeO (s) + C (s) ⇌ 2Fe (s) + CO2 (g)
A. K eq: 1 x 10^-38, ΔG°: negative
B. K eq: 1 x 10^-38, ΔG°: positive
C. K eq: 1 x 10^26, ΔG°: negative
D. K eq: 1 x 10^26 ΔG°: positive
Answers
For the reaction 2FeO (s) + C (s) ⇌ 2Fe (s) + CO\(_2\) (g), equilibrium constant Keq is 1 x 10²⁶. Therefore, the correct option is option C.
The value of a chemical reaction's reaction quotient at chemical equilibrium, a condition that a dynamic chemical system approaches when enough time has passed and at which its composition has no discernible tendency to change further, is the equilibrium constant for that reaction. The equilibrium constant is independent of the initial analytical concentrations of the reactant and product species in the mixture for a given set of reaction conditions. As a result, the composition of a system at equilibrium can be calculated from its initial composition using known equilibrium constant values.
Keq = Keq1 × Keq2
= (2Fe(s) + O\(_2\)(g))/(2FeO(s)) × CO\(_2\)(g)/(C(s) × O\(_2\)(g))
= (2Fe(s) × CO\(_2\)(g))/(2FeO(s) × C(s))
Keq = (1 x 10⁻⁶)²/(1 x 10⁻³²)
= 1 x 10²⁶
ΔG° = -RTlnK_eq
ΔG° = -8.314 J/mol·K × (1000 K) × ln(1 x 10²⁶)
= -2.785 x 10⁵ J/mol
Therefore, the correct option is option C.
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I’m second guessing myself here...
