Pigments absorbed weakly move fast or slow?

Answer:

A) It increases when the concentration of reactants increases.

Explanation:

When you increase the concentration, there is more of a substance, and therefore more opportunities for the reactants to collide together with enough energy to create a product.

Answer:

A) It increases when the concentration of reactants increases.

Explanation:

It's just right!!!

Answer:Graduated Cylinder

Explanation:

You use the water displacement test to find the volume of irregular shaped objects.

Answer:

Graduated Cylinder

The predominant form of CH3CH2NH3 at pH = 14 will be the ionized form.

This is because at high pH, the solution is basic, and there are excess hydroxide ions. The hydroxide ions remove a proton from the ammonium ion, forming ammonia and water. The chemical equation for this reaction is as follows:CH3CH2NH3+ OH- → CH3CH2NH2 + H2O

The predominant form of CH3CH2NH3 at pH = 14 is CH3CH2NH2. This is the ionized form of the compound, which has lost a proton to become an amine. The structure of the predominant form of CH3CH2NH3 at pH = 14 is shown below:CH3CH2NH2

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The molar volume is calculated dividing molar mass of compound by it's density.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.Molar mass gives the molecular weight of a substance required for making the solutions.

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Answer:

Answer:

c. The rusting of the joints of a metal children’s swing set.

Explanation:

By definition, chemical property describes the ability of a substance to undergo a specific chemical change.

In the definition above, the key words are; "Chemical change".

Generally, chemical changes are irreversible. This means we just have t observe the options and pick the one that contains an irreversible change.

Upon doing ths, the correct option is;

c. The rusting of the joints of a metal children’s swing set.

This is because rusting is a chemical change and is irreversible.

Water molecules have a stronger attraction than helium due to the presence of dipole-dipole interactions resulting from the polarity of the water molecule.

Water molecules have a stronger attraction than helium due to the difference in their intermolecular forces. Intermolecular forces are the attractive forces that exist between molecules and play a crucial role in determining the physical properties of substances.

Water molecules have a polar nature, meaning they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom.

This polarity arises from the unequal sharing of electrons in the O-H bonds due to oxygen's higher electronegativity compared to hydrogen. The presence of polar bonds within the water molecule gives rise to a dipole-dipole interaction.

In contrast, helium is a noble gas and exists as individual atoms. Helium atoms are electrically neutral and do not possess a permanent dipole moment.

As a result, helium exhibits weak intermolecular forces known as London dispersion forces or Van der Waals forces. These forces arise due to temporary fluctuations in electron distribution, causing temporary dipoles that induce dipoles in neighboring atoms or molecules.

The dipole-dipole interaction in water is stronger than the London dispersion forces in helium. This is because dipole-dipole forces are more significant when there are permanent dipoles in the molecules.

The stronger attraction between water molecules leads to higher boiling and melting points compared to helium.

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In modern proteomic analysis, the amino acid sequence of a protein can be determined by methods such as mass spectrometry and Edman degradation.

Proteomics is the large-scale study of proteins, particularly their structures and functions. Determining the amino acid sequence of a protein is a fundamental aspect of proteomics, as it provides important information about the structure and function of the protein. Modern proteomic analysis has several methods for determining the amino acid sequence of a protein.

One such method is mass spectrometry, which involves the ionization and fragmentation of the protein into smaller peptide fragments, and the measurement of the mass-to-charge ratios of these fragments. By analyzing the mass-to-charge ratios of these fragments, the amino acid sequence of the original protein can be reconstructed.

Another method is Edman degradation, which involves the sequential removal of amino acids from the N-terminus of the protein and their identification through chemical reactions. These methods are both widely used in modern proteomic analysis and have greatly advanced our understanding of the structure and function of proteins.

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Explanation:

Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom

Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms.

I hope you got it..... ♥️

Answer:

1) 1Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. **

2) Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. ^^

Explanation:

The alkaline earth metals are six chemical elements. They belong to the group 2 of the periodic table. They are: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)

Answer: d. calcium

8. The number of molecules in 745 grams of C₁₄H₁₈N₂O₅ is 1.53×10²⁴ molecules

9. The mass of 5×10²⁵ molecules of Fe₂(SO₃)₃ is 29201.26 g

10. The mass of 6.30 moles of Ba₃(PO₄)₂ is 3786.3 g

The number of molecules present in 745 grams of C₁₄H₁₈N₂O₅ can be obtained as follow:

From Avogadro's hypothesis,

1 mole of C₁₄H₁₈N₂O₅ = 6.022×10²³ molecules

But

1 mole of C₁₄H₁₈N₂O₅ = 294 g

Therefore, we can say that

294 g of C₁₄H₁₈N₂O₅ = 6.022×10²³ molecules

Thus,

745 g of C₁₄H₁₈N₂O₅ = (745 × 6.022×10²³) / 294

745 g of C₁₄H₁₈N₂O₅ = 1.53×10²⁴ molecules

Thus, the number of molecules is 1.53×10²⁴ molecules

The mass of 5×10²⁵ molecules of Fe₂(SO₃)₃ can be obtained as follow:

6.022×10²³ molecules = 1 mole of Fe₂(SO₃)₃

But

1 mole of Fe₂(SO₃)₃ = 351.7

Therefore, we can say that

6.022×10²³ molecules = 351.7 g of Fe₂(SO₃)₃

Thus,

5×10²⁵ molecules = (5×10²⁵ × 351.7) / 6.022×10²³

5×10²⁵ molecules = 29201.26 g of Fe₂(SO₃)₃

Thus, we can conclude that the mass is 29201.26 g

The mass of 6.30 moles of Ba₃(PO₄)₂ can be obtained as follow:

Mole = mass / molar mass

6.3 = Mass of Ba₃(PO₄)₂ / 601

Cross multiply

Mass of Ba₃(PO₄)₂= 6.3 × 601

Mass of Ba₃(PO₄)₂= 3786.3 g

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Answer:

cool boy

Explanation:

The spectroscopy has been an analytical technique used for the qualitative and quantitative determination of the sample.

\(A=\epsilon \;cl\)

Where A= absorbance

The molar absorptivity, \(\epsilon\)

The concentration of the sample, c

The path length of the sample, l

The absorbance of the sample has been given as:

A=cl

Where, the absorbance of sample, A=1AU

The path length of the sample, l=.46 cm

The concentration of sample has been given by substituting the values as:

\(1=1.46\;\times\;c\\c=\dfrac{1}{1.46} \text{M}\\c=0.68\;\text M\)

The concentration of the sample with molar absorptivity 1 has been 0.68 M.

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The Rutherford experiment was used to prove the existence of a positively charged nucleus containing the protons.

The Rutherford experiment was used to prove the existence of a positively charged nucleus..

Alpha particles passed mostly undeflected through a aluminum foil.

The part of the foil where the alpha particles were deflected  was the positively charged nucleus where most of the mass of the atom was concentrated.

In conclusion, the Rutherford experiment proved the existence of a positively charged nucleus.

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(a) Myristate (14:0) has a higher melting point than stearate (18:0).

(b) Palmitate (16:0) has a higher melting point than palmitoleate [cis 16:1(Δ9)].

(c) α-Linolenate [cis 18:3(Δ9,12,15)] has a lower melting point than oleate [cis 18:1(Δ9)].

In general, the melting point of a fatty acid is influenced by its chain length, degree of unsaturation, and the cis/trans configuration of the double bonds. Shorter chain lengths tend to have lower melting points than longer chain lengths due to decreased intermolecular forces. Saturated fatty acids (without double bonds) generally have higher melting points than unsaturated fatty acids due to increased intermolecular interactions. Within unsaturated fatty acids, increasing the degree of unsaturation (more double bonds) tends to decrease the melting point. Additionally, cis double bonds introduce kinks in the fatty acid chain, preventing close packing and further lowering the melting point.

Using this information, we can make the following conclusions:

(a) Myristate (14:0) has a higher melting point than stearate (18:0). This is because stearate has a longer chain length than myristate, resulting in stronger intermolecular forces and a higher melting point.

(b) Palmitate (16:0) has a higher melting point than palmitoleate [cis 16:1(Δ9)]. The presence of a cis double bond in palmitoleate introduces a kink in the chain, reducing intermolecular interactions and lowering the melting point compared to the saturated palmitate.

(c) α-Linolenate [cis 18:3(Δ9,12,15)] has a lower melting point than oleate [cis 18:1(Δ9)]. α-Linolenate has more double bonds (three) compared to oleate (one), introducing more kinks in the chain and reducing intermolecular interactions. This leads to a lower melting point for α-linolenate.

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Answer:

Answer is 2nd

Explanation:

some energy is transformed into mass

Answer:

A picture .There is high reactions in progression still the energy reaction reduced to indicate complete reaction.

Answer:

pic 3

Explanation:

(A) ON EDG2021

Answer:

light

Explanation:

i did the quiz

To determine the number of grams of NH4Br needed to prepare an aqueous solution at a specific pH,

follow these steps:

1. Write the balanced chemical equation for the dissociation of NH4Br in water:
  NH4Br (aq) ⇌ NH4+ (aq) + Br- (aq)

2. Construct an ICE table:
  Initial:
     [NH4Br] = x
     [NH4+] = 0
     [Br-] = 0

  Change:
     [NH4Br] = -x
     [NH4+] = +x
     [Br-] = +x

  Equilibrium:
     [NH4Br] = 0
     [NH4+] = x
     [Br-] = x

3. Write the equilibrium constant expression for Ka, the acid dissociation constant of NH4+:
  Ka = [H+][NH3] / [NH4+]

4. Calculate the initial concentration of NH4+ based on the desired pH (use the formula pH = -log10[H+]):
  [H+] = 10^(-pH)
  [NH4+] = x

5. Substitute the equilibrium concentrations into the Ka expression and solve for x:
  Ka = [H+][NH3] / [NH4+]

6. Calculate the initial moles of NH4Br using the value of x:
  moles NH4Br = x * total volume of the solution

7. Determine the mass of NH4Br by multiplying the moles by its molar mass (NH4Br = 97.94 g/mol):
  mass NH4Br = moles NH4Br * molar mass of NH4Br

The number of grams of NH4Br needed to prepare the aqueous solution at the specific pH is equal to the calculated mass of NH4Br in step 7.

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The ideal gas law, which relates the pressure, volume, temperature, and number of moles of an ideal gas, can be applied to real-world situations. By considering a specific scenario and applying the ideal gas law, we can analyze the behavior of gases and make predictions about their properties.

Let's consider a situation where a scuba diver is exploring underwater at a depth of 30 meters. We can apply the ideal gas law, specifically the form known as Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Question: How does the pressure of the gas in the scuba tank change as the diver descends to a depth of 30 meters, assuming the temperature remains constant?

To answer this question, we can use the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. By keeping the temperature constant, we can observe the relationship between pressure and volume as the diver descends and calculate the change in pressure based on the change in volume.

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Answer:

Just think of whats in a forest ecosystem

for example

Water

sunlight

tempreture

The abiotic factor that has been capable of contributing to the energy cycle of the mangroves has been climate.

Mangrove trees are the shrubs that have been found in the coastal regions. The trees have been capable of tolerating the harsh climatic conditions such as salty water, the flow of tides, etc.

The abiotic are the nonliving factors that has been capable of changing get resulting in the formulation of the ecosystem.

The mangroves have been capable to thrive in hard conditions. The abiotic factor that has been capable to affect the growth of the mangroves has been climate.

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[A]t versus t gives first order reaction, ln[A]t versus t gives second order reaction and 1/[A]t versus t  gives third order reaction.

The order of reaction has been defined as the rate's power dependency on reactant concentration. That once rate law of something like a reaction has been identified, the same rule may be utilized to fully comprehend the content of the reaction mixture.

In plenty of other words, this reaction order is indeed the exponent through which the concentration of a given species is increased, and it indicates how the concentrations of the species impacts the rate of reaction.

[A]t versus t gives first order reaction

ln[A]t versus t gives second order reaction

1/[A]t versus t  gives third order reaction

Therefore, [A]t versus t gives first order reaction, ln[A]t versus t gives second order reaction and 1/[A]t versus t  gives third order reaction.

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Answer:

It's a double displacement reaction.

Answer:

1. Zinc

Zinc also plays a vital role in our body because it is the main component of all cells and also provides protection against microbes. It is also needed for the production of DNA and protein. Zinc is good to take when you are feeling sick with a cold or even a sore throat. But Zinc in excess amount can cause copper deficiency, upset stomach aches, and diarrhea

2.Iron

Iron is a major component of hemoglobin which is responsible for the transportation of oxygen from the lungs to all cells of the body. Women take to iron a lot to give them energy after childbirth because they become iron deficient. Iron in excess can have a negative effect on our body such as it causes liver disease (cirrhosis, cancer), heart attack, diabetes and sometimes it causes death.

Explanation:

Answer: Tendons.

Explanation: A tendon is a fibrous connective tissue which attaches muscle to bone.

The conclusion about the rates of the rotting reaction from the table would be that the reaction occurs more quickly when the concentration of salt is higher—option B.

The rate of reaction, or reaction rate, is the time it takes for a reaction to occur. In other words, it is the time it takes for the reactants of a reaction to become products.

In this case, the reactant is the rope and the product is the rotten product of the rope. From the table, it took 10 years for the rope to decay in a lake. On the other hand, it took the same rope just 4 years to decay in an ocean.

The difference between the two water bodies is the presence of salt. The lake has almost zero salt while the conentration of salt in the ocean water is high.

Thus, the conclusion about the rate of rotting reaction would be that the reaction is hastened by the presence of salt in the ocean water.

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Answer: 3.6 ml

Hope this helps!