Estimates are that all natural processes (not including human activities) result in a near balance between carbon entering and leaving the atmosphere (actually slightly less entering than leaving). What is the estimate of the excess CO2 in gigatons of carbon per year added to the atmosphere from human activities (that is, the amount above that removed by natural processes)?

The term solution is synonymous with homogeneous mixture. The correct option is C

A homogeneous mixture known as a solution is one in which the solute, or substance being dissolved, is evenly distributed throughout the solvent. The solute particles in a solution are typically molecular or ionic in nature and dispersed uniformly throughout the solvent. As a result, the combination has a consistent composition and appearance throughout, defining it as a homogenous mixture.

A heterogeneous mixture is one in which the constituent parts are not equally dispersed and can be identified visually. In contrast, in a solution, the constituents are evenly combined.

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Answer:

\(d)cellulose \\ monomer \: is \: glucose \\ thank \: you\)

Answer:

cellulose

Explanation:

Answer:

the third one

Explanation:

Answer:

c

Explanation:

The number of moles of NaOH required to neutralize the KHP solution is 0.006933 moles.

To determine the number of moles of NaOH required to neutralize the solution containing KHC8H4O4 (KHP), we need to use the balanced chemical equation between NaOH and KHP.

The balanced equation is as follows:

KHP + NaOH → NaKP + H2O

From the equation, we can see that the stoichiometric ratio between KHP and NaOH is 1:1.

First, we need to calculate the number of moles of KHP in the solution. We can use the formula:

moles KHP = mass KHP / molar mass KHP

The molar mass of KHC8H4O4 (KHP) is approximately 204.22 g/mol.

moles KHP = 1.416 g / 204.22 g/mol

Next, we need to determine the volume of the solution. The given volume is 75 mL, but it's best to convert it to liters for consistency in units:

volume solution = 75 mL = 0.075 L

Now, we can calculate the number of moles of NaOH required by using the stoichiometric ratio:

moles NaOH = moles KHP

=0.006933 moles

Therefore, the number of moles of NaOH required to neutralize the KHP solution is 0.006933 moles.

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Answer:

omg

Explanation:

omg omg omg omg omg omg omg omg omg omg I can't either ehhhhhh

For getting an indication whether a chemical reaction or chemical change has taken place, if  B)Heat is given off then chemical reactions occur. So,correct option is B.

Chemical reactions are surrounding us, from the digestion of food in our body to how the light we get from the sun is the consequence of compound responses. Prior to starting with compound responses, realizing about physical and synthetic changes is significant

Option A can't be the response is dissolving is an actual change. No substance response occurred.

Option B is the response as it is an EXOTHERMIC reaction so intensity will be emitted.

Option C can't be the response as dissolving is essentially ions becoming particles, not a synthetic response by which a reactant responds with one more reactant to shape an item.

Option D can't be the response. Same explanation with respect to why An isn't the response.

Hence, correct option is B.

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(Complete question) is:

When determining whether a chemical reaction has taken place, you observe and look for several indicators. Which would be considered an indication that a chemical reaction or chemical change has taken place? A) Solid melts. B) Heat is given off. C) Substance dissolves D) Substance changes shape.

Answer:

what is the question

Explanation:

l do not see any question

Answer: Can you widened it? We can't see it.

Explanation:

A single electron is present in the valence shell of sodium shown.

What is a valence shell?

In chemistry and physics, the valence electron is an electron that is part of the outer shell of an atom. When the outer shell is open, the valence electron can participate in the formation of a chemical bond. Each atom in a bond contributes a valence electron and forms a common pair in a single covalent bond. The valence shell of an atom refers to its outermost orbit or shell. These electrons are necessary for creating bonds between atoms. It can be filled whole or in part.

So, as you can see from the diagram, we see that there is only one electron in the valence shell.

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Answer: Decomposition is the answer

Explanation: why because aluminium hydroxide would decomposes in the presence of heat and would form an oxide which is aluminium oxide and would also form water as a product.

HOPE THIS HELPS!!

The percent yield of the compound C₅H₁₂ when 3. 00 g of C₅H₁₂ were obtained in the reaction of 5. 00 g of C₃H₄ is 4.16%.

In the actual world, chemical processes do not always happen as intended. Apart from spills and other experimental failures, there are frequently losses as a result of an incomplete reaction, unwanted side reactions, and so on. Chemists require a metric that reflects the success of a reaction. This is referred to as the percent yield.

To calculate the percent yield, first establish how much of the product should be created using stoichiometry. The theoretical yield is the greatest quantity of product that can be created from the given quantities of reactants. The amount of product created when the reaction is carried out in the laboratory is referred to as the real yield.

We have equation as,

5C₃H₄ + 8H₂ → 3C₅H₁₂

We have 3 grams of C₅H₁₂

we have 5 grams of C₃H₄

Theoretical yield = C₅H₁₂ = 5 x 12 + 12 x 1 = 72

So percent yield  = actual yield / Theoretical yield x 100

= 3/ 72 x 100

= 0.04167 x 100

= 4.16 %

So percentage yield is 4.16%.

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Answer:

Strong acid

Explanation:

Answer:

Strong acid

Explanation:

Aromaticity is a property associated with certain cyclic compounds that have a specific arrangement of electrons.

To determine if [16]-, [28]-, or [22]-annulene would be aromatic if each ring is planar, we need to consider Huckel's rule.

According to Huckel's rule, a cyclic compound is aromatic if it has 4n + 2 π electrons, where n is an integer.

For [16]-annulene, there would be 16 π electrons, which satisfies Huckel's rule (n = 3), making it aromatic.

For [28]-annulene, there would be 28 π electrons, which also satisfies Huckel's rule (n = 6), making it aromatic.

However, for [22]-annulene, there would be 22 π electrons, which does not satisfy Huckel's rule. Therefore, [22]-annulene would not be aromatic if each ring is planar.

In summary, both [16]- and [28]-annulene would be aromatic if each ring is planar, while [22]-annulene would not.

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Depending on the chemical, these longer-term health effects might include:

The radioactive of the specimen will decline to 10 kbq approximately 64.7 seconds after the initial measurement of 70 kbq.t

To answer this question, we need to use the radioactive decay law, which states that the activity of a radioactive sample is proportional to the number of radioactive nuclei present and is given by the equation:

A = A0 e^(-λt)

where A is the activity at time t, A0 is the initial activity, λ is the decay constant, and e is the mathematical constant equal to approximately 2.718.

We are given the decay constant of the nuclide, which is λ = 3.1 x 10^-3 s^-1, and the initial activity of the specimen, which is A0 = 70 kbq. We want to find the time it takes for the activity to decline to 10 kbq, which we will call t.

So we can rearrange the equation to solve for t:

t = (ln(A0/A)) / λ

Plugging in the values we have:

t = (ln(70/10)) / 3.1 x 10^-3
t = 64.7 seconds (to three significant figures)

Therefore, the activity of the specimen will decline to 10 kbq approximately 64.7 seconds after the initial measurement of 70 kbq.

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Answer:

Atoms are the smallest particle that an element can be divided in to. When atoms come together, they form molecules and molecules start to create everything around you.

Atoms are the smallest particles of matter which on combining with atoms of the same type give rise to molecules.

Matter is a substance which is made up of various types of particles  which occupy space and have inertia . All living things and objects  are made up of various types of particles  that occupy space and have inertia .

Depending on temperature and other factors matter is able to exist in different phases. Most common of which are solid, liquid and gas. Matter can exist in more than one state depending on the temperature  and pressure .

State of matter can be changed  by heating or cooling and even by changing the applied pressure.When a state changes matter does not break rather its state changes though its chemical composition remains same.

Physical characteristics of matter are shape, color, size and temperature. Every matter is made up of elements which  cannot be broken down further by ordinary chemical reactions.

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The number of ionic bond in copper is zero.

Pure copper or any pure metal for that matter are examples of metallic bonds, which are neither ionic nor covalent. The copper atoms are stacked very tightly in a solid lattice. In fact it has a face centered cubic lattice which is the closed packing of atoms possible. Each atom has twelve nearest neighbors which allows their 4s orbitals (mostly) to have the optimal overlap. All of these orbitals therefore combine in one gigantic band of delocalized orbitals that spans the entire crystal with its myriad atoms. This band is only partly filled and the difference in energy between one state and the next is puny, which explains copper’s outstanding conductive properties.

Therefore, the bonding in copper has a metallic character.

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The correct answer is E) SO₄²⁻. The conjugate base of HSO₄⁻ is E) SO₄²⁻. To determine the conjugate base of HSO₄⁻ , we need to understand that a conjugate base is formed when an acid donates a proton (H⁺). In this case, the acid is  HSO₄⁻ . When HSO₄⁻ donates a proton, it loses one H⁺ and becomes SO₄²⁻. Thus, the conjugate base of HSO₄⁻ is SO₄²⁻.

A conjugate base is the species that remains after a proton (H⁺) is removed from an acid. In the case of HSO₄⁻ , it is a weak acid that can donate one proton to a base. Once it loses a proton, it becomes its conjugate base, which is SO₄²⁻. This is because the hydrogen ion that was removed from HSO₄⁻ leaves behind the sulfate ion (SO₄²⁻) with a negative charge.

It is essential to understand the concept of conjugate acid-base pairs as they are fundamental to acid-base chemistry. The conjugate acid-base pair has the same chemical formula but differs in the presence or absence of an extra proton. Understanding these concepts will help you solve problems related to acid-base equilibria, pH calculations, and buffer systems.

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Answer:

b.location in the sky (If the question is saying:The H-R diagram is useful in

studying all of these about a star except for)

Explanation:

The theoretical HR diagram plots the temperature of the star vs their luminosity (brightness) and the observational HR diagram plots color of the stars vs the absolute magnitude. Depending on mass, stars will also go through specific evolutionary stages that can be seen through the location of the star on the HR diagram. However, the HR diagram will not have data on the location of the star in the sky.

Beta particle (β) is the product of radioactive decay 0-1e.

Beta particles (β) are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei such as potassium-40, carbon-14, and strontium-90, among others. Beta particles, like alpha particles and gamma rays, are one of the three forms of ionizing radiation produced by radioactive materials.

Unlike alpha particles, which are helium-4 nuclei, beta particles are fast-moving electrons. They may be positively charged (positrons) or negatively charged (negatrons), depending on the isotope. The charge on a beta particle is 1.6 x 10^-19 Coulombs, the same as that of an electron. Beta particles may travel hundreds of feet in air and several millimeters in tissue, and they can penetrate clothing and skin.

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Answer

they atract

Explanation:

The following are the predictions if whether each of the substances will conduct an electric current: a) Conducts b) Does not conduct c) Does not conduct hence the correct option is b.

a) Potassium hydroxide (KOH) is an ionic compound that dissolves in water to form potassium ions (K+) and hydroxide ions (OH-), which allows the solution to conduct an electric current.

b) Glucose (C6H12O6) is a covalent compound and does not dissociate into ions when dissolved in water, so the solution does not conduct an electric current.

c) Ethanol (C2H5OH) is also a covalent compound and does not dissociate into ions when dissolved in water, so the solution does not conduct an electric current.

The correct options are therefore a)conducts, b) does not conduct and c) does not conduct which corresponds to choice b.

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Ionization of beryllium (Be) produces a +2 charge. Be now has a net positive charge of +2 after losing two electrons and gaining two fewer negative charges in its ionized state.

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Explanation:

here's the answer to your question

Answer:

The person is Dmitri Mendeleev

Answer:

6.14x10^24

Explanation:

convert the given 47.0g to mols then to molecules.

\(\frac{47.0g}{} x\frac{1mol}{46.07g}x\frac{6.022x10^{23} }{1 mol}\)

46.07 is the molar mass of ethanol

6.022x10^23 is avogadros number

i. Ionic bond: bond between an anion and a cation. ii. Polar covalent: bond between atoms of the same element but different electronegativities. iii. Non-polar covalent: weak intramolecular bond. iv. Hydrogen: bond between the hydrogen atom in one molecule and a more electronegative atom in another molecule

Based on their properties, chemical bonds are classified into four major types. These include Ionic bonds, covalent bonds, polar covalent bonds, and hydrogen bonds. Some characteristics of the four types of chemical bonds are as follows:

i. Ionic bond: An ionic bond is formed when electrons are transferred from one atom to another atom. The resulting ions are attracted to each other and form an ionic bond. Ionic bonds are typically between metals and nonmetals.

ii. Polar covalent bond: Polar covalent bonds occur when atoms of the same element but different electronegativities bond. The atoms share the electrons unequally in a polar covalent bond, creating a partial positive charge on the less electronegative atom and a partial negative charge on the more electronegative atom. Polar covalent bonds typically occur between nonmetals.

iii. Non-polar covalent bond: Non-polar covalent bonds occur between two atoms of the same element or between different elements with the same electronegativity. The sharing of electrons between the atoms in a nonpolar covalent bond is equal. As a result, there is no net charge distribution across the molecule, and the bond is nonpolar. Nonpolar covalent bonds typically occur between nonmetals.

iv. Hydrogen bond: Hydrogen bonds are weak intramolecular bonds that occur between the hydrogen atom in one molecule and a more electronegative atom in another molecule. Hydrogen bonds are important in the secondary and tertiary structures of proteins and the structure of water.

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