2. Leaves turning brown in the fall

Chemical or Physical or Both

What Evidences show that it’s Chemical, Physical, or Both:

the acid and base in the starting materials, and place the conjugate acid and conjugate base products.

When compared to the base from which it was produced, conjugate acid have one more H atom and one more + charge. Conjugate acid is created when a base accepts a proton from an acid. In comparison to the acid that it was produced from, a conjugate base has one extra - charge and one fewer H atom. It is an acidic residue left over after the hydrogen ion has been removed. In comparison to the acid that it was produced from, a conjugate base has one extra - charge and one fewer H atom. conjugate base is an acidic residue left over after the hydrogen ion has been removed. Consider the reaction between bicarbonate ions and water to produce carbonic acid and hydronium ions. HCO3 + H2O becomes H2CO3 + OH base + acid and then becomes Conj A + Conj B.

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Answer:

nucleus

Explanation:

Answer:

The nucleus

Explanation:

The nucleus can be thought of as the brains of a cell.

-CancerQuest

Answer:

5 million million atoms can fit at the end of a needle

Answer:

Let's just say 5 million million hydrogen atoms could fit at the end of a needle.

Explanation:

Atoms are 100 picometers, and to compare, the amount of even 1 centimeter, a calculator can't even figure out how many picometers are in a centimeter because there is just too much picometers.

Answer: D

Explanation:

D - Decomposition of carbonates into oxide and carbon dioxide

A - Combustion reaction. Combustion of methane to form Carbon dioxide and water.

C - Reaction of reactive metal (Na) and water to form hydroxide.

B - No particular name of the reaction. Usually denoted as a synthesis redox reaction.

Answer:CaCO3  CaO + CO2

Explanation: just took it

From a single fossil, scientists can directly gather information about the physical characteristics and morphology of the organism that left the fossil.Option B. What the organism looked like is the correct nswer.

Fossils can preserve various parts of an organism, such as bones, teeth, shells, or even imprints of soft tissues. By studying the fossil's structure, shape, and features, scientists can infer the appearance and anatomical details of the organism, including its size, shape, skeletal structure, and sometimes even its coloration or texture.

While scientists can make educated guesses about other aspects, such as how the organism is related to present-day organisms (A), its reproductive behavior (C), or the exact lifespan (D), these details are typically inferred through comparative studies, analysis of multiple fossils, and other lines of evidence.

However, directly from a single fossil, the most immediate and concrete information that can be obtained is about the physical characteristics and appearance of the organism (B).Option B is correct.

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Answer:

specular reflection reflects all light which arrives from a given direction at the same angles where diffus reflection reflects light in a broad range of direction

Comparing the density values for the liquid in Part whose actual density is 1.50 g/mL:

Precision and accuracy are two important concepts in the field of measurement.

Precision refers to how consistent or reproducible a set of measurements is under the same conditions. In other words, precision describes the degree to which repeated measurements of the same quantity give similar results.

Accuracy, on the other hand, refers to how close a measured value is to the true or accepted value of the quantity being measured. In other words, accuracy describes the degree to which a measurement is free from systematic errors or biases.

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Complete question:

The density values for the liquid in Part I are found in the table in the attached picture.

The correct matches are:

(i) Acid chlorides and esters experience primarily dipole-dipole interactions between their molecules.

(ii) 1º and 2º amides experience primarily hydrogen bonding between their molecules.

(iii) Acid chlorides, esters, and 3º amides have lower boiling points than other carboxylic acid derivatives of similar size and shape.

(iv) 1º and 2º amides have the highest boiling points among other carboxylic acid derivatives of similar size and shape.

i.

Acid chlorides and esters experience primarily dipole-dipole interactions between their molecules due to the presence of polar bonds within the molecules.

ii.

1º and 2º amides experience primarily hydrogen bonding between their molecules, as they contain the necessary hydrogen and oxygen or nitrogen atoms for hydrogen bonding.

iii.

Acid chlorides, esters, and 3º amides have lower boiling points than other carboxylic acid derivatives of similar size and shape. This is due to the absence of hydrogen bonding in these compounds, resulting in weaker intermolecular forces.

iv.

1º and 2º amides have the highest boiling points among other carboxylic acid derivatives of similar size and shape. This is because they can form extensive hydrogen bonding between their molecules, leading to stronger intermolecular forces and higher boiling points.

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Answer:

the answer is in the image

Explanation:

Aristotle claims that the function of human life is rational activity.

He believed that humans have a unique capacity for reason and that the ultimate goal of human existence is to use this reason to achieve eudaimonia or a state of flourishing and happiness. While survival and reproduction may be necessary for human existence, Aristotle believed that they are not the ultimate purpose of life.

Similarly, while serving the gods may be important for some individuals or cultures, Aristotle's philosophy focuses on individual human flourishing through rational activity. Pursuing pleasure may be one aspect of a fulfilling life, but it is not the ultimate goal. Instead, Aristotle argued that rational activity, including virtues such as wisdom and courage, is necessary for achieving eudaimonia and living a fulfilling life.

The complete question can be as follows:

Aristotle claims that the function of human life is?

a. survival and reproduction.

b. service to the gods.

c. rational activity.

d. to pursue pleasure

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Answer:

the difference is fumaric acid the carboxylic acid groups are trans (E) and in maleic acid they are cis (Z)

Explanation:

and  Fumarate is an intermediate in the citric acid cycle used by cells to produce energy in the form of adenosine triphosphate (ATP) from food

Explaination :

Negative ion -

Electrons may be taken out of or added to an atom with far more ease than protons or neutrons. The process of adding or removing electrons from an atom results in the formation of ions. An atom obtains one electron and becomes an anion when the number of electrons in the atom is greater than the number of protons.

A cation is a positively charged ion that resulted from electron loss; these ions have fewer electrons than protons. Atoms do this to increase their energy stability by filling their outer electron shell.

The negatively charged ions that balance the net positive charge from metal ions such as k, na, and ca2 are anions.

The most abundant anion outside the cell is Chloride (Cl-) and it neutralizes sodium ions (Na+) most often.

Chloride (Cl-) is one of the major anions in the extracellular fluid, responsible for maintaining the osmotic balance and electrical neutrality of the extracellular fluid.

Sodium ions (Na+) are one of the most common positively charged metal ions, that are balanced by negatively charged ions like Cl-.

Chloride ions are important in the body for helping maintain the acid-base balance in the body and regulating the pH of the blood.

They are also involved in the production of stomach acid by the parietal cells in the stomach.

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Answer:

18

Explanation:

Element   Symbol   no of Atoms

Copper           Cu                3

Sulfur            S                3

Oxygen           O                  12

                                              18 = total

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, there are total 18 electrons in the given compound.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Element     Symbol               no of Atoms

Copper           Cu                      3

Sulfur                S                      3

Oxygen            O                      12

S, there are total 18 electrons in the given compound.

Therefore, there are total 18 electrons in the given compound.

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Among the options provided, the substance that acts at a long distance from the site at which it is secreted is a hormone.

Hormones are chemical messengers produced by endocrine glands and released into the bloodstream. They travel throughout the body and exert their effects on target cells that may be far away from the site of secretion.

Hormones play a crucial role in regulating various physiological processes and maintaining homeostasis in the body. They act by binding to specific receptors on target cells, initiating a cascade of events that ultimately lead to a specific response. Due to their ability to travel through the bloodstream, hormones can reach distant target cells, even in different organs or tissues, allowing for widespread and systemic coordination of bodily functions.

In contrast, synaptic signals and neurotransmitters primarily function in neural communication within the nervous system. Synaptic signals occur at the synapses, which are junctions between neurons, allowing for rapid and localized transmission of signals. Neurotransmitters are chemical messengers that are released from the presynaptic neuron and bind to receptors on the postsynaptic neuron, transmitting the signal across the synapse.

Local regulators and paracrine signals, on the other hand, act over shorter distances within the immediate vicinity of their secretion. Local regulators are involved in cell-cell communication within a specific tissue or organ, while paracrine signals are secreted by one cell and act on nearby target cells.

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The pH of the solution prepared by diluting 250.0 mL of 0.045 M Sr(OH)2 to a total volume of 625.0 mL is approximately 12.56.

To calculate the pH of a solution prepared by diluting 250.0 mL of 0.045 M Sr(OH)2 with enough water to make a total volume of 625.0 mL, we need to consider the dissociation of Sr(OH)2 and the resulting concentration of hydroxide ions (OH-). The pH can be determined by taking the negative logarithm (base 10) of the hydroxide ion concentration.

The initial concentration of Sr(OH)2 is 0.045 M, and after dilution, the final volume becomes 625.0 mL. To find the final concentration of hydroxide ions, we can use the fact that Sr(OH)2 dissociates completely in water to produce two hydroxide ions for every mole of Sr(OH)2.

Given that the final volume is 625.0 mL, we can calculate the moles of Sr(OH)2 initially present:

Moles of Sr(OH)2 = initial concentration * initial volume

Moles of Sr(OH)2 = 0.045 M * 0.250 L (converting mL to L) = 0.01125 moles

Since each mole of Sr(OH)2 produces two moles of hydroxide ions, the moles of hydroxide ions in the solution will be twice the moles of Sr(OH)2:

Moles of OH- = 2 * 0.01125 moles = 0.0225 moles

To find the final concentration of hydroxide ions:

Final concentration of OH- = moles of OH- / final volume

Final concentration of OH- = 0.0225 moles / 0.625 L (converting mL to L) = 0.036 M

Finally, we can calculate the pH using the negative logarithm (base 10) of the hydroxide ion concentration:

pOH = -log10(OH- concentration) = -log10(0.036) ≈ 1.44

pH = 14 - pOH = 14 - 1.44 ≈ 12.56

Therefore, the pH of the solution prepared by diluting 250.0 mL of 0.045 M Sr(OH)2 to a total volume of 625.0 mL is approximately 12.56.


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Answer:

Examples of complex compound include potassium ferrocyanide K4[Fe(CN)6] and potassium ferricyanide K3[Fe(CN)6]. Other examples include pentaamine chloro cobalt(III) chloride [Co(NH)5Cl]Cl2 and dichlorobis platinum(IV) nitrate [Pt(en)2Cl2](NO3)2.

Answer:

2c 1s

Expination: it came by there are 2carbon and 1sulphur

Answer:

2c1s

Explanation:

2c1s make me brainlist

a. dinitrogen oxide (N2O)

O=16.00g

N=14.00g * 2 = 28.00g

So NO2 = 44.00g

You have 100g of NO2, you need moles.

So:

100g of NO2 x 1 mol NO2/44g of NO2 = your answer

b. All right. So let's go ahead and convert our 100 grams of stuff. Two moles. So starting with, we have 100 grams, uh, and 20 times we know we're gonna have one more on the top. We need the molar mass. So if we look at our periodic table, nitrogen has a molar mass of 14 point. Oh, sevens will multiply that by two. Since we have two nitrogen in our compound plus 15.999 your period table might be slightly different. That's okay. Just stay consistent with your numbers. If we add those together, we should get 44 point no. 13 grams for everyone. Mole. That's why it's ah conversion factor of the inner calculator and get 2.27 moles into right. And then, um, we have 100 grams of other substance teach your each times we know our one mole from the conversion factor will be on the tops. Wouldn't do that now and then. Carbon 12.1 Um, options. 15.99 and then hydrogen is one point 08 So I had all those together multiply by our sub scripts and get 32 point go for two calculate. That would be 3.12 moles of C H 30 H for the same mass. What this means is that CH. 30 H husband It contains more moles than in 20

There are 12.044 × 10^23 oxygen molecule present in 2mole of oxygen molecule.

According to the context, the word may as well as may not encompass ions that meet this requirement. A molecule is a collection of two as well as more atoms linked together by the attractive forces described as chemical bonds.

The lowest unit into which a substance could be divided while still being the same substance would be a molecule. It is composed of two as well as more atoms which are chemically bonded to one another.

1 mole of oxygen = 1 O2 molecule

2 mole = 2 O2 molecule = 2 × 6.022 × 10^23 molecule = 12.044 × 10^23 molecule

Thus, 2 mole of oxygen will have 12.044 × 10^23 molecule

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Answer:

Element is a pure substance that cannot split up into simpler form by chemical means while compound is a substance that is made up by two or more elements in a chemical combination

Periods are horizontal columns of the periodic table which have same number of shell

Groups are vertical columns with the same number of outer most shell

Halogens react with metals to form salts

5b. He arranged elements in order of their increasing atomic masses and by similarities of properties

6. Calcium Ca

Barium Ba

Helium He

Neon Ne

7a. 2NaOH + O2

7c. alkali Will observed

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 5 × 200

We have the final answer as

Hope this helps you

To solve this question we have to convert the given mass of litium hydroxide to moles using the molecular mass of this compound:

Now, use the stoichiometric ratio given by the chemical equation:

Finally, convert the moles of CO₂ to g using the molecular mass of CO₂:

The mass of carbon dioxide required to react with 80.5g of LiOH is 73.92g.

Answer:

You solve that dividing beach term by -8 and simplifying which for this answers will give you r=-30

Explanation:

Pls correct me if I’m wrong.

Hope this helps :)

Answer:

Liquid

Explanation:

The concentration of A after 30 seconds when the given reaction obeys the rate law rate = k[A]²[B].

We use the initial concentration of A and B and the rate constant of the reaction to find the rates at these concentrations. Using the integrated rate law for a second-order reaction, we find the concentration of A after 30 seconds to be 0.0934 M.

Given reaction obeys the rate law, rate=k[A]²[B].

Here, the initial concentration of A= 0.10 M,

initial concentration of B = 0.05 M, and

rate constant, k = 2.0 × 10⁻⁴ M⁻¹s⁻¹

We have to find the concentration of A, after 30 seconds.

To find the concentration of A, we need to know the rate at 0.10 M and 0.05 M. Therefore, we have to calculate the rates at these concentrations.

rate1 = k[A]²[B]

= (2.0 × 10⁻⁴ M⁻¹s⁻¹)(0.10 M)²(0.05 M)

= 1.0 × 10⁻⁷ M/srate2

= k[A]²[B] = (2.0 × 10⁻⁴ M⁻¹s⁻¹)(0.09 M)²(0.04 M)

= 6.48 × 10⁻⁸ M/s

Using the integrated rate law for a second-order reaction: [A] = [A]₀ - kt where [A]₀ = initial concentration of A, k = rate constant, and t = time in seconds.

We know [A]₀ = 0.10 M and k = 2.0 × 10⁻⁴ M⁻¹s⁻¹.

Substituting the values in the above equation, we get: [A] = [A]₀ - kt= 0.10 M - (2.0 × 10⁻⁴ M⁻¹s⁻¹)(30 s)≈ 0.0934 M

Therefore, the concentration of A in the vessel after 30 seconds is 0.0934 M.

This question requires us to calculate the concentration of A after 30 seconds when the given reaction obeys the rate law rate = k[A]²[B].

We are given the initial concentration of A and B and the rate constant of the reaction. To find the concentration of A after 30 seconds, we need to calculate the rates at the initial concentrations of A and B.

Using the integrated rate law for a second-order reaction, we can find the concentration of A at any given time. We substitute the given values in the formula and solve for [A]. We get the concentration of A as 0.0934 M after 30 seconds. This calculation is based on the assumption that no other reaction is important.

The concentration of A after 30 seconds when the given reaction obeys the rate law rate = k[A]²[B]. We use the initial concentration of A and B and the rate constant of the reaction to find the rates at these concentrations. Using the integrated rate law for a second-order reaction, we find the concentration of A after 30 seconds to be 0.0934 M. This calculation assumes that no other reaction is important.

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The spot with the lowest Rf value would be the most polar one and, thus, the one that is least soluble in the stationary phase.

Does more polarity indicate a higher or lower Rf value?

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Answer:

Good morning!!!

Explanation: